streams implementation
This commit is contained in:
Leo Horie
parent
94a8be4fca
commit
b9ce90765d
12 changed files with 1104 additions and 167 deletions
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@ -1,11 +1,15 @@
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T.time("Setup");
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var request = require("../../request/request")(window, Promise).ajax
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var Stream = require("../../util/stream")
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var requestService = require("../../request/request")(window, Stream)
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var request = requestService.xhr
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var m = require("../../render/hyperscript")
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var trust = require("../../render/trust")
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var renderer = require("../../render/render")(window)
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var router = require("../../router/router")(window)
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requestService.setCompletionCallback(run)
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//API calls
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var api = {
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home : function() {
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@ -14,7 +18,7 @@ var api = {
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},
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thread : function(id) {
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T.timeEnd("Setup")
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return request({method: "GET", url: T.apiUrl + "/comments/" + id}).then(T.transformResponse)
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return request({method: "GET", url: T.apiUrl + "/comments/" + id}).map(T.transformResponse)
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},
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newThread : function(text) {
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return request({method: "POST", url: T.apiUrl + "/threads/create",data: {text: text}})
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@ -27,29 +31,27 @@ var api = {
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var threads = [], current = null, loaded = false, error = false, notFound = false
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function loadThreads() {
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loaded = false
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api.home().then(function(response) {
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api.home().map(function(response) {
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document.title = "ThreaditJS: Mithril | Home"
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threads = response.data
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loaded = true
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}, function() {
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}).catch(function() {
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loaded = error = true
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})
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.then(run)
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}
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function loadThread(id) {
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loaded = false
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notFound = false
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api.thread(id).then(function(response) {
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api.thread(id).map(function(response) {
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document.title = "ThreaditJS: Mithril | " + T.trimTitle(response.root.text);
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loaded = true
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current = response
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}, function(response) {
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}).catch(function(response) {
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loaded = true
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if (response.status === 404) notFound = true
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else error = true
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})
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.then(run)
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}
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function unloadThread() {
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current = null
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@ -57,11 +59,10 @@ function unloadThread() {
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function createThread() {
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var threadText = document.getElementById("threadText")
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api.newThread(threadText.value).then(function(response) {
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api.newThread(threadText.value).map(function(response) {
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threadText.value = "";
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threads.push(response.data);
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})
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.then(run)
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return false
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}
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@ -72,12 +73,11 @@ function showReplying(vnode) {
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}
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function submitComment(vnode) {
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api.newComment(vnode.state.newComment, vnode.attrs.node.id).then(function(response) {
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api.newComment(vnode.state.newComment, vnode.attrs.node.id).map(function(response) {
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vnode.state.newComment = ""
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vnode.state.replying = false
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vnode.attrs.node.children.push(response.data)
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})
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.then(run)
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return false
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}
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@ -18,6 +18,7 @@
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<script src="../../querystring/build.js"></script>
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<script src="../../querystring/parse.js"></script>
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<script src="../../router/router.js"></script>
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<script src="../../util/stream.js"></script>
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<script src="../../request/request.js"></script>
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<script src="app.js"></script>
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</body>
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41
index.js
41
index.js
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@ -1,21 +1,30 @@
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"use strict"
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;(function () {
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var Promise = require("./promise/promise")
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var m = require("./render/hyperscript")
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var renderService = require("./render/render")(window)
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var redrawService = require("./api/pubsub")()
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var requestService = require("./request/request")(window, Promise)
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m.request = requestService.xhr
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m.jsonp = requestService.jsonp
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m.route = require("./api/router")(window, renderService, redrawService)
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m.mount = require("./api/mount")(renderService, redrawService)
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m.trust = require("./render/trust")
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m.prop = require("./util/prop")
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m.withAttr = require("./util/withAttr")
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m.render = renderService.render
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m.redraw = redrawService.publish
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var Stream = require("./util/stream")
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var m = require("./render/hyperscript")
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var renderService = require("./render/render")(window)
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var redrawService = require("./api/pubsub")()
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var requestService = require("./request/request")(window)
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requestService.setCompletionCallback(redrawService.publish)
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m.version = "bleeding-edge"
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m.request = requestService.xhr
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m.jsonp = requestService.jsonp
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m.route = require("./api/router")(window, renderService, redrawService)
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m.mount = require("./api/mount")(renderService, redrawService)
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m.trust = require("./render/trust")
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m.prop = Stream.stream
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m.prop.combine = Stream.combine
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m.prop.reject = Stream.reject
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m.prop.HALT = Stream.HALT
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m.withAttr = require("./util/withAttr")
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m.render = renderService.render
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m.redraw = redrawService.publish
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if (typeof module === "object") module.exports = m
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else window.m = m
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if (typeof module === "object") module.exports = m
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else window.m = m
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})()
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@ -1,83 +1,94 @@
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"use strict"
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var buildQueryString = require("../querystring/build")
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var Stream = require("../util/stream")
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module.exports = function($window, Promise) {
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module.exports = function($window) {
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var callbackCount = 0
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var oncompletion
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function setCompletionCallback(callback) {oncompletion = callback}
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function xhr(args) {
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return new Promise(function(resolve, reject) {
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var useBody = typeof args.useBody === "boolean" ? args.useBody : args.method !== "GET" && args.method !== "TRACE"
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if (typeof args.serialize !== "function") args.serialize = JSON.stringify
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if (typeof args.deserialize !== "function") args.deserialize = deserialize
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if (typeof args.extract !== "function") args.extract = extract
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args.url = interpolate(args.url, args.data)
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if (useBody) args.data = args.serialize(args.data)
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else args.url = assemble(args.url, args.data)
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var xhr = new $window.XMLHttpRequest()
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xhr.open(args.method, args.url, typeof args.async === "boolean" ? args.async : true, typeof args.user === "string" ? args.user : undefined, typeof args.password === "string" ? args.password : undefined)
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if (args.serialize === JSON.stringify && useBody) {
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xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8")
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}
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if (args.deserialize === deserialize) {
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xhr.setRequestHeader("Accept", "application/json, text/*")
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}
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if (typeof args.config === "function") xhr = args.config(xhr, args) || xhr
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xhr.onreadystatechange = function() {
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if (xhr.readyState === 4) {
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try {
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var response = args.deserialize(args.extract(xhr, args))
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if (xhr.status >= 200 && xhr.status < 300) {
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if (typeof args.type === "function") {
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if (response instanceof Array) {
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for (var i = 0; i < response.length; i++) {
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response[i] = new args.type(response[i])
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}
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var stream = Stream.stream()
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var useBody = typeof args.useBody === "boolean" ? args.useBody : args.method !== "GET" && args.method !== "TRACE"
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if (typeof args.serialize !== "function") args.serialize = JSON.stringify
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if (typeof args.deserialize !== "function") args.deserialize = deserialize
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if (typeof args.extract !== "function") args.extract = extract
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args.url = interpolate(args.url, args.data)
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if (useBody) args.data = args.serialize(args.data)
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else args.url = assemble(args.url, args.data)
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var xhr = new $window.XMLHttpRequest()
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xhr.open(args.method, args.url, typeof args.async === "boolean" ? args.async : true, typeof args.user === "string" ? args.user : undefined, typeof args.password === "string" ? args.password : undefined)
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if (args.serialize === JSON.stringify && useBody) {
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xhr.setRequestHeader("Content-Type", "application/json; charset=utf-8")
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}
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if (args.deserialize === deserialize) {
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xhr.setRequestHeader("Accept", "application/json, text/*")
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}
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if (typeof args.config === "function") xhr = args.config(xhr, args) || xhr
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xhr.onreadystatechange = function() {
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if (xhr.readyState === 4) {
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try {
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var response = args.deserialize(args.extract(xhr, args))
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if (xhr.status >= 200 && xhr.status < 300) {
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if (typeof args.type === "function") {
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if (response instanceof Array) {
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for (var i = 0; i < response.length; i++) {
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response[i] = new args.type(response[i])
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}
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else response = new args.type(response)
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}
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resolve(response)
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else response = new args.type(response)
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}
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else reject(new Error(xhr.responseText))
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}
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catch (e) {
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reject(e)
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stream(response)
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}
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else stream.error(new Error(xhr.responseText))
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}
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catch (e) {
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stream.error(e)
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}
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if (typeof oncompletion === "function") oncompletion()
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}
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if (useBody) xhr.send(args.data)
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else xhr.send()
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})
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}
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if (useBody) xhr.send(args.data)
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else xhr.send()
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return stream
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}
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function jsonp(args) {
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return new Promise(function(resolve, reject) {
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var callbackName = args.callbackName || "_mithril_" + Math.round(Math.random() * 1e16) + "_" + callbackCount++
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var script = $window.document.createElement("script")
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$window[callbackName] = function(data) {
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script.parentNode.removeChild(script)
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resolve(data)
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delete $window[callbackName]
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}
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script.onerror = function() {
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script.parentNode.removeChild(script)
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reject(new Error("JSONP request failed"))
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delete $window[callbackName]
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}
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if (args.data == null) args.data = {}
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args.url = interpolate(args.url, args.data)
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args.data[args.callbackKey || "callback"] = callbackName
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script.src = assemble(args.url, args.data)
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$window.document.documentElement.appendChild(script)
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})
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var stream = Stream.stream()
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var callbackName = args.callbackName || "_mithril_" + Math.round(Math.random() * 1e16) + "_" + callbackCount++
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var script = $window.document.createElement("script")
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$window[callbackName] = function(data) {
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script.parentNode.removeChild(script)
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stream(data)
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if (typeof oncompletion === "function") oncompletion()
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delete $window[callbackName]
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}
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script.onerror = function() {
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script.parentNode.removeChild(script)
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stream.error(new Error("JSONP request failed"))
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if (typeof oncompletion === "function") oncompletion()
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delete $window[callbackName]
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}
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if (args.data == null) args.data = {}
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args.url = interpolate(args.url, args.data)
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args.data[args.callbackKey || "callback"] = callbackName
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script.src = assemble(args.url, args.data)
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$window.document.documentElement.appendChild(script)
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return stream
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}
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function interpolate(url, data) {
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@ -110,5 +121,5 @@ module.exports = function($window, Promise) {
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function extract(xhr) {return xhr.responseText}
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return {xhr: xhr, jsonp: jsonp}
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return {xhr: xhr, jsonp: jsonp, setCompletionCallback: setCompletionCallback}
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}
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@ -9,9 +9,10 @@
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<script src="../../querystring/parse.js"></script>
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<script src="../../test-utils/parseURL.js"></script>
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<script src="../../test-utils/callAsync.js"></script>
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<script src="../../test-utils/ajaxMock.js"></script>
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<script src="../../test-utils/xhrMock.js"></script>
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<script src="../../querystring/build.js"></script>
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<script src="../../util/stream.js"></script>
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<script src="../../request/request.js"></script>
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<script src="test-xhr.js"></script>
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<script src="test-jsonp.js"></script>
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@ -9,7 +9,7 @@ o.spec("jsonp", function() {
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var mock, jsonp
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o.beforeEach(function() {
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mock = xhrMock()
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jsonp = new Request(mock, Promise).jsonp
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jsonp = new Request(mock).jsonp
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})
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o("works", function(done) {
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@ -19,9 +19,9 @@ o.spec("jsonp", function() {
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return {status: 200, responseText: queryData["callback"] + "(" + JSON.stringify({a: 1}) + ")"}
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}
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})
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jsonp({url: "/item"}).then(function(data) {
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jsonp({url: "/item"}).map(function(data) {
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o(data).deepEquals({a: 1})
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}).then(done)
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}).map(done)
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})
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o("works w/ other querystring params", function(done) {
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mock.$defineRoutes({
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@ -30,10 +30,10 @@ o.spec("jsonp", function() {
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return {status: 200, responseText: queryData["callback"] + "(" + JSON.stringify(queryData) + ")"}
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}
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})
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jsonp({url: "/item", data: {a: "b", c: "d"}}).then(function(data) {
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jsonp({url: "/item", data: {a: "b", c: "d"}}).map(function(data) {
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delete data["callback"]
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o(data).deepEquals({a: "b", c: "d"})
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}).then(done)
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}).map(done)
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})
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o("works w/ custom callbackKey", function(done) {
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mock.$defineRoutes({
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@ -42,9 +42,9 @@ o.spec("jsonp", function() {
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return {status: 200, responseText: queryData["cb"] + "(" + JSON.stringify({a: 2}) + ")"}
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}
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})
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jsonp({url: "/item", callbackKey: "cb"}).then(function(data) {
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jsonp({url: "/item", callbackKey: "cb"}).map(function(data) {
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o(data).deepEquals({a: 2})
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}).then(done)
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}).map(done)
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})
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o("handles error", function(done) {
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jsonp({url: "/item", callbackKey: "cb"}).catch(function(e) {
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@ -8,7 +8,7 @@ o.spec("xhr", function() {
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var mock, xhr
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o.beforeEach(function() {
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mock = xhrMock()
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xhr = new Request(mock, Promise).xhr
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xhr = new Request(mock).xhr
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})
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o.spec("success", function() {
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@ -19,9 +19,9 @@ o.spec("xhr", function() {
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return {status: 200, responseText: JSON.stringify({a: 1})}
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}
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})
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xhr({method: "GET", url: "/item"}).then(function(data) {
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xhr({method: "GET", url: "/item"}).map(function(data) {
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o(data).deepEquals({a: 1})
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}).then(function() {
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}).map(function() {
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done()
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})
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})
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@ -31,9 +31,9 @@ o.spec("xhr", function() {
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return {status: 200, responseText: JSON.stringify({a: 1})}
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}
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})
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xhr({method: "GET", url: "/item"}).then(function(data) {
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xhr({method: "GET", url: "/item"}).map(function(data) {
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o(data).deepEquals({a: 1})
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}).then(done)
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}).map(done)
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})
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o("works w/ parameterized data via GET", function(done) {
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mock.$defineRoutes({
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@ -41,9 +41,9 @@ o.spec("xhr", function() {
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return {status: 200, responseText: JSON.stringify({a: request.query})}
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}
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})
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xhr({method: "GET", url: "/item", data: {x: "y"}}).then(function(data) {
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xhr({method: "GET", url: "/item", data: {x: "y"}}).map(function(data) {
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o(data).deepEquals({a: "?x=y"})
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}).then(done)
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}).map(done)
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})
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o("works w/ parameterized data via POST", function(done) {
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mock.$defineRoutes({
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@ -51,9 +51,9 @@ o.spec("xhr", function() {
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return {status: 200, responseText: JSON.stringify({a: JSON.parse(request.body)})}
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}
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})
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xhr({method: "POST", url: "/item", data: {x: "y"}}).then(function(data) {
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xhr({method: "POST", url: "/item", data: {x: "y"}}).map(function(data) {
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o(data).deepEquals({a: {x: "y"}})
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}).then(done)
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}).map(done)
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})
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o("works w/ parameterized data containing colon via GET", function(done) {
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mock.$defineRoutes({
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@ -61,9 +61,9 @@ o.spec("xhr", function() {
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return {status: 200, responseText: JSON.stringify({a: request.query})}
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}
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})
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xhr({method: "GET", url: "/item", data: {x: ":y"}}).then(function(data) {
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xhr({method: "GET", url: "/item", data: {x: ":y"}}).map(function(data) {
|
||||
o(data).deepEquals({a: "?x=%3Ay"})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("works w/ parameterized data containing colon via POST", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -71,9 +71,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({a: JSON.parse(request.body)})}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item", data: {x: ":y"}}).then(function(data) {
|
||||
xhr({method: "POST", url: "/item", data: {x: ":y"}}).map(function(data) {
|
||||
o(data).deepEquals({a: {x: ":y"}})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("works w/ parameterized url via GET", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -81,9 +81,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({a: request.url, b: request.query})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item/:x", data: {x: "y"}}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item/:x", data: {x: "y"}}).map(function(data) {
|
||||
o(data).deepEquals({a: "/item/y", b: {}})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("works w/ parameterized url via POST", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -91,9 +91,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({a: request.url, b: JSON.parse(request.body)})}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item/:x", data: {x: "y"}}).then(function(data) {
|
||||
xhr({method: "POST", url: "/item/:x", data: {x: "y"}}).map(function(data) {
|
||||
o(data).deepEquals({a: "/item/y", b: {}})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("ignores unresolved parameter via GET", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -101,9 +101,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({a: request.url})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item/:x"}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item/:x"}).map(function(data) {
|
||||
o(data).deepEquals({a: "/item/:x"})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("ignores unresolved parameter via POST", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -111,9 +111,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({a: request.url})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item/:x"}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item/:x"}).map(function(data) {
|
||||
o(data).deepEquals({a: "/item/:x"})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("type parameter works for Array responses", function(done) {
|
||||
var Entity = function(args) {
|
||||
|
|
@ -125,9 +125,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify([{id: 1}, {id: 2}, {id: 3}])}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item", type: Entity}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item", type: Entity}).map(function(data) {
|
||||
o(data).deepEquals([{_id: 1}, {_id: 2}, {_id: 3}])
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("type parameter works for Object responses", function(done) {
|
||||
var Entity = function(args) {
|
||||
|
|
@ -139,9 +139,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({id: 1})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item", type: Entity}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item", type: Entity}).map(function(data) {
|
||||
o(data).deepEquals({_id: 1})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("serialize parameter works in GET", function(done) {
|
||||
var serialize = function(data) {
|
||||
|
|
@ -153,9 +153,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({body: request.query})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item", serialize: serialize, data: {id: 1}}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item", serialize: serialize, data: {id: 1}}).map(function(data) {
|
||||
o(data.body).equals("?id=1")
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("serialize parameter works in POST", function(done) {
|
||||
var serialize = function(data) {
|
||||
|
|
@ -167,9 +167,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({body: request.body})}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item", serialize: serialize, data: {id: 1}}).then(function(data) {
|
||||
xhr({method: "POST", url: "/item", serialize: serialize, data: {id: 1}}).map(function(data) {
|
||||
o(data.body).equals("id=1")
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("deserialize parameter works in GET", function(done) {
|
||||
var deserialize = function(data) {
|
||||
|
|
@ -181,9 +181,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({test: 123})}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item", deserialize: deserialize}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item", deserialize: deserialize}).map(function(data) {
|
||||
o(data).equals("{\"test\":123}")
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("deserialize parameter works in POST", function(done) {
|
||||
var deserialize = function(data) {
|
||||
|
|
@ -195,9 +195,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: JSON.stringify({test: 123})}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item", deserialize: deserialize}).then(function(data) {
|
||||
xhr({method: "POST", url: "/item", deserialize: deserialize}).map(function(data) {
|
||||
o(data).equals("{\"test\":123}")
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("extract parameter works in GET", function(done) {
|
||||
var extract = function(data) {
|
||||
|
|
@ -209,9 +209,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: ""}
|
||||
}
|
||||
})
|
||||
xhr({method: "GET", url: "/item", extract: extract}).then(function(data) {
|
||||
xhr({method: "GET", url: "/item", extract: extract}).map(function(data) {
|
||||
o(data).deepEquals({test: 123})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("extract parameter works in POST", function(done) {
|
||||
var extract = function(data) {
|
||||
|
|
@ -223,9 +223,9 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: ""}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item", extract: extract}).then(function(data) {
|
||||
xhr({method: "POST", url: "/item", extract: extract}).map(function(data) {
|
||||
o(data).deepEquals({test: 123})
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("config parameter works", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -233,7 +233,7 @@ o.spec("xhr", function() {
|
|||
return {status: 200, responseText: ""}
|
||||
}
|
||||
})
|
||||
xhr({method: "POST", url: "/item", config: config}).then(done)
|
||||
xhr({method: "POST", url: "/item", config: config}).map(done)
|
||||
|
||||
function config(xhr) {
|
||||
o(typeof xhr.setRequestHeader).equals("function")
|
||||
|
|
@ -251,7 +251,7 @@ o.spec("xhr", function() {
|
|||
})
|
||||
xhr({method: "GET", url: "/item"}).catch(function(e) {
|
||||
o(e.message).equals(JSON.stringify({error: "error"}))
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
o("rejects on non-JSON server error", function(done) {
|
||||
mock.$defineRoutes({
|
||||
|
|
@ -261,7 +261,7 @@ o.spec("xhr", function() {
|
|||
})
|
||||
xhr({method: "GET", url: "/item"}).catch(function(e) {
|
||||
o(e.message).equals("error")
|
||||
}).then(done)
|
||||
}).map(done)
|
||||
})
|
||||
})
|
||||
})
|
||||
|
|
@ -1,8 +0,0 @@
|
|||
"use strict"
|
||||
|
||||
module.exports = function(store) {
|
||||
return function() {
|
||||
if (arguments.length > 0) store = arguments[0]
|
||||
return store
|
||||
}
|
||||
}
|
||||
159
util/stream.js
Normal file
159
util/stream.js
Normal file
|
|
@ -0,0 +1,159 @@
|
|||
"use strict"
|
||||
|
||||
var guid = 0, noop = function() {}, HALT = {}
|
||||
function createStream() {
|
||||
function stream() {
|
||||
if (arguments.length > 0) updateStream(stream, arguments[0], undefined)
|
||||
return stream._state.value
|
||||
}
|
||||
initStream(stream, arguments)
|
||||
|
||||
if (arguments.length > 0) updateStream(stream, arguments[0], undefined)
|
||||
|
||||
return stream
|
||||
}
|
||||
function initStream(stream, args) {
|
||||
stream.constructor = createStream
|
||||
stream._state = {id: guid++, value: undefined, error: undefined, state: 0, derive: undefined, recover: undefined, deps: {}, parents: [], errorStream: undefined, endStream: undefined}
|
||||
stream.map = map, stream.ap = ap, stream.of = createStream
|
||||
stream.valueOf = valueOf
|
||||
stream.catch = doCatch
|
||||
|
||||
Object.defineProperties(stream, {
|
||||
error: {get: function() {
|
||||
if (!stream._state.errorStream) {
|
||||
var errorStream = function() {
|
||||
if (arguments.length > 0) updateStream(stream, undefined, arguments[0])
|
||||
return stream._state.error
|
||||
}
|
||||
initStream(errorStream, [])
|
||||
initDependency(errorStream, [stream], noop, noop)
|
||||
stream._state.errorStream = errorStream
|
||||
}
|
||||
return stream._state.errorStream
|
||||
}},
|
||||
end: {get: function() {
|
||||
if (!stream._state.endStream) {
|
||||
var endStream = createStream()
|
||||
endStream.map(function(value) {
|
||||
if (value === true) unregisterStream(stream), unregisterStream(endStream)
|
||||
return value
|
||||
})
|
||||
stream._state.endStream = endStream
|
||||
}
|
||||
return stream._state.endStream
|
||||
}}
|
||||
})
|
||||
}
|
||||
function updateStream(stream, value, error) {
|
||||
if (!absorbStream(stream, value, false) && !absorbStream(stream, error, true)) {
|
||||
updateState(stream, value, error)
|
||||
for (var id in stream._state.deps) updateDependency(stream._state.deps[id], false)
|
||||
finalize(stream)
|
||||
}
|
||||
}
|
||||
function updateState(stream, value, error) {
|
||||
if (error !== undefined && typeof stream._state.recover === "function") {
|
||||
try {updateValues(stream, stream._state.recover(), undefined)}
|
||||
catch (e) {updateValues(stream, undefined, e)}
|
||||
}
|
||||
else updateValues(stream, value, error)
|
||||
stream._state.changed = true
|
||||
if (stream._state.state !== 2) stream._state.state = 1
|
||||
}
|
||||
function updateValues(stream, value, error) {
|
||||
stream._state.value = value
|
||||
stream._state.error = error
|
||||
}
|
||||
function updateDependency(stream, mustSync) {
|
||||
var state = stream._state, parents = state.parents
|
||||
if (parents.length > 0 && parents.filter(active).length === parents.length && (mustSync || parents.filter(changed).length > 0)) {
|
||||
var failed = parents.filter(errored)
|
||||
if (failed.length > 0) updateState(stream, undefined, failed[0]._state.error)
|
||||
else {
|
||||
try {
|
||||
var value = state.derive()
|
||||
if (!absorbStream(stream, value)) updateState(stream, value, undefined)
|
||||
}
|
||||
catch (e) {
|
||||
updateState(stream, undefined, e)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
function absorbStream(stream, value, isError) {
|
||||
if (value != null && value.constructor === createStream) {
|
||||
if (value._state.state === 2) {
|
||||
stream.end(true)
|
||||
stream(value())
|
||||
}
|
||||
else if (value._state.error) stream.error(value.error())
|
||||
else if (value._state.state === 0) return true
|
||||
else if (!isError) stream(value())
|
||||
else stream.error(value())
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
function finalize(stream) {
|
||||
stream._state.changed = false
|
||||
for (var id in stream._state.deps) stream._state.deps[id]._state.changed = false
|
||||
}
|
||||
|
||||
function doCatch(fn) {
|
||||
var stream = this
|
||||
var derive = function() {return stream._state.value}
|
||||
var recover = function() {return fn(stream._state.error)}
|
||||
return initDependency(createStream(), [stream], derive, recover)
|
||||
}
|
||||
function combine(fn, streams) {
|
||||
return initDependency(createStream(), streams, function() {
|
||||
var failed = streams.filter(errored)
|
||||
if (failed.length > 0) throw failed[0]._state.error
|
||||
return fn.apply(this, streams.concat([streams.filter(changed)]))
|
||||
}, undefined)
|
||||
}
|
||||
|
||||
function initDependency(dep, streams, derive, recover) {
|
||||
var state = dep._state
|
||||
state.derive = derive
|
||||
state.recover = recover
|
||||
state.parents = streams.filter(notEnded)
|
||||
|
||||
registerDependency(dep, state.parents)
|
||||
updateDependency(dep, true)
|
||||
|
||||
return dep
|
||||
}
|
||||
function registerDependency(stream, parents) {
|
||||
for (var i = 0; i < parents.length; i++) {
|
||||
parents[i]._state.deps[stream._state.id] = stream
|
||||
registerDependency(stream, parents[i]._state.parents)
|
||||
}
|
||||
}
|
||||
function unregisterStream(stream) {
|
||||
for (var id in stream._state.deps) {
|
||||
var dependent = stream._state.deps[id]
|
||||
var index = dependent._state.parents.indexOf(stream)
|
||||
if (index > -1) dependent._state.parents.splice(index, 1)
|
||||
}
|
||||
stream._state.state = 2 //ended
|
||||
stream._state.deps = {}
|
||||
}
|
||||
|
||||
function map(fn) {return combine(function(stream) {return fn(stream())}, [this])}
|
||||
function ap(stream) {return combine(function(s1, s2) {return s1()(s2())}, [this, stream])}
|
||||
function valueOf() {return this._state.value}
|
||||
|
||||
function active(stream) {return stream._state.state === 1}
|
||||
function changed(stream) {return stream._state.changed}
|
||||
function notEnded(stream) {return stream._state.state !== 2}
|
||||
function errored(stream) {return stream._state.error}
|
||||
|
||||
function reject(e) {
|
||||
var stream = createStream()
|
||||
stream.error(e)
|
||||
return stream
|
||||
}
|
||||
|
||||
module.exports = {stream: createStream, combine: combine, reject: reject}
|
||||
|
|
@ -6,11 +6,12 @@
|
|||
<body>
|
||||
<script src="../../module/module.js"></script>
|
||||
<script src="../../ospec/ospec.js"></script>
|
||||
<script src="../../test-utils/callAsync.js"></script>
|
||||
|
||||
<script src="../../util/prop.js"></script>
|
||||
<script src="../../util/withAttr.js"></script>
|
||||
<script src="test-prop.js"></script>
|
||||
<script src="../../util/stream.js"></script>
|
||||
<script src="test-withAttr.js"></script>
|
||||
<script src="test-stream.js"></script>
|
||||
|
||||
<script>require("../../ospec/ospec").run()</script>
|
||||
</body>
|
||||
|
|
|
|||
|
|
@ -1,16 +0,0 @@
|
|||
"use strict"
|
||||
|
||||
var o = require("../../ospec/ospec")
|
||||
var prop = require("../../util/prop")
|
||||
|
||||
o.spec("prop", function() {
|
||||
o("works", function() {
|
||||
var store = prop(1)
|
||||
var initialValue = store()
|
||||
store(2)
|
||||
var newValue = store()
|
||||
|
||||
o(initialValue).equals(1)
|
||||
o(newValue).equals(2)
|
||||
})
|
||||
})
|
||||
779
util/tests/test-stream.js
Normal file
779
util/tests/test-stream.js
Normal file
|
|
@ -0,0 +1,779 @@
|
|||
"use strict"
|
||||
|
||||
var o = require("../../ospec/ospec")
|
||||
var callAsync = require("../../test-utils/callAsync")
|
||||
var Stream = require("../../util/stream")
|
||||
|
||||
o.spec("stream", function() {
|
||||
o.spec("stream", function() {
|
||||
o("works as getter/setter", function() {
|
||||
var stream = Stream.stream(1)
|
||||
var initialValue = stream()
|
||||
stream(2)
|
||||
var newValue = stream()
|
||||
|
||||
o(initialValue).equals(1)
|
||||
o(newValue).equals(2)
|
||||
})
|
||||
o("has undefined value by default", function() {
|
||||
var stream = Stream.stream()
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
})
|
||||
o("can update to undefined", function() {
|
||||
var stream = Stream.stream(1)
|
||||
stream(undefined)
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
})
|
||||
})
|
||||
o.spec("combine", function() {
|
||||
o("transforms value", function() {
|
||||
var stream = Stream.stream()
|
||||
var doubled = Stream.combine(function(s) {return s() * 2}, [stream])
|
||||
|
||||
stream(2)
|
||||
|
||||
o(doubled()).equals(4)
|
||||
})
|
||||
o("transforms default value", function() {
|
||||
var stream = Stream.stream(2)
|
||||
var doubled = Stream.combine(function(s) {return s() * 2}, [stream])
|
||||
|
||||
o(doubled()).equals(4)
|
||||
})
|
||||
o("transforms multiple values", function() {
|
||||
var s1 = Stream.stream()
|
||||
var s2 = Stream.stream()
|
||||
var added = Stream.combine(function(s1, s2) {return s1() + s2()}, [s1, s2])
|
||||
|
||||
s1(2)
|
||||
s2(3)
|
||||
|
||||
o(added()).equals(5)
|
||||
})
|
||||
o("transforms multiple default values", function() {
|
||||
var s1 = Stream.stream(2)
|
||||
var s2 = Stream.stream(3)
|
||||
var added = Stream.combine(function(s1, s2) {return s1() + s2()}, [s1, s2])
|
||||
|
||||
o(added()).equals(5)
|
||||
})
|
||||
o("transforms mixed default and late-bound values", function() {
|
||||
var s1 = Stream.stream(2)
|
||||
var s2 = Stream.stream()
|
||||
var added = Stream.combine(function(s1, s2) {return s1() + s2()}, [s1, s2])
|
||||
|
||||
s2(3)
|
||||
|
||||
o(added()).equals(5)
|
||||
})
|
||||
o("combines atomically", function() {
|
||||
var count = 0
|
||||
var a = Stream.stream()
|
||||
var b = Stream.combine(function(a) {return a() * 2}, [a])
|
||||
var c = Stream.combine(function(a) {return a() * a()}, [a])
|
||||
var d = Stream.combine(function(b, c) {
|
||||
count++
|
||||
return b() + c()
|
||||
}, [b, c])
|
||||
|
||||
a(3)
|
||||
|
||||
o(d()).equals(15)
|
||||
o(count).equals(1)
|
||||
})
|
||||
o("combines default value atomically", function() {
|
||||
var count = 0
|
||||
var a = Stream.stream(3)
|
||||
var b = Stream.combine(function(a) {return a() * 2}, [a])
|
||||
var c = Stream.combine(function(a) {return a() * a()}, [a])
|
||||
var d = Stream.combine(function(b, c) {
|
||||
count++
|
||||
return b() + c()
|
||||
}, [b, c])
|
||||
|
||||
o(d()).equals(15)
|
||||
o(count).equals(1)
|
||||
})
|
||||
o("combine lists only changed upstreams in last arg", function() {
|
||||
var streams = []
|
||||
var a = Stream.stream()
|
||||
var b = Stream.stream()
|
||||
var c = Stream.combine(function(a, b, changed) {
|
||||
streams = changed
|
||||
}, [a, b])
|
||||
|
||||
a(3)
|
||||
b(5)
|
||||
|
||||
o(streams.length).equals(1)
|
||||
o(streams[0]).equals(b)
|
||||
})
|
||||
o("combine lists only changed upstreams in last arg with default value", function() {
|
||||
var streams = []
|
||||
var a = Stream.stream(3)
|
||||
var b = Stream.stream(5)
|
||||
var c = Stream.combine(function(a, b, changed) {
|
||||
streams = changed
|
||||
}, [a, b])
|
||||
|
||||
a(7)
|
||||
|
||||
o(streams.length).equals(1)
|
||||
o(streams[0]).equals(a)
|
||||
})
|
||||
o("combine can return undefined", function() {
|
||||
var a = Stream.stream(1)
|
||||
var b = Stream.combine(function(a) {
|
||||
return undefined
|
||||
}, [a])
|
||||
|
||||
o(b()).equals(undefined)
|
||||
})
|
||||
o("combine absorbs streams", function() {
|
||||
var a = Stream.stream(1)
|
||||
var b = Stream.combine(function(a) {
|
||||
return Stream.stream(2)
|
||||
}, [a])
|
||||
|
||||
o(b()).equals(2)
|
||||
})
|
||||
o("combine absorbs errored streams", function() {
|
||||
var a = Stream.stream(1)
|
||||
var b = Stream.combine(function(a) {
|
||||
return Stream.reject(new Error("error"))
|
||||
}, [a])
|
||||
|
||||
o(b()).equals(undefined)
|
||||
o(b.error().message).equals("error")
|
||||
})
|
||||
o("combine absorbs ready streams", function() {
|
||||
var count = 0
|
||||
var a = Stream.stream(1)
|
||||
var b = Stream.combine(function(a) {
|
||||
return Stream.stream()
|
||||
}, [a])
|
||||
var c = Stream.combine(function(b) {
|
||||
count++
|
||||
return 2
|
||||
}, [b])
|
||||
|
||||
o(c()).equals(undefined)
|
||||
o(count).equals(0)
|
||||
})
|
||||
})
|
||||
o.spec("end", function() {
|
||||
o("end stream works", function() {
|
||||
var stream = Stream.stream()
|
||||
var doubled = Stream.combine(function(stream) {return stream() * 2}, [stream])
|
||||
|
||||
stream.end(true)
|
||||
|
||||
stream(3)
|
||||
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
o("end stream works with default value", function() {
|
||||
var stream = Stream.stream(2)
|
||||
var doubled = Stream.combine(function(stream) {return stream() * 2}, [stream])
|
||||
|
||||
stream.end(true)
|
||||
|
||||
stream(3)
|
||||
|
||||
o(doubled()).equals(4)
|
||||
})
|
||||
o("cannot add downstream to ended stream", function() {
|
||||
var stream = Stream.stream(2)
|
||||
stream.end(true)
|
||||
|
||||
var doubled = Stream.combine(function(stream) {return stream() * 2}, [stream])
|
||||
stream(3)
|
||||
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
})
|
||||
o.spec("error", function() {
|
||||
o("error() works", function() {
|
||||
var stream = Stream.stream()
|
||||
var errored = Stream.combine(function(stream) {throw new Error("error")}, [stream])
|
||||
|
||||
stream(3)
|
||||
|
||||
o(errored()).equals(undefined)
|
||||
o(errored.error().message).equals("error")
|
||||
})
|
||||
o("error() works with default value", function() {
|
||||
var stream = Stream.stream(3)
|
||||
var errored = Stream.combine(function(stream) {throw new Error("error")}, [stream])
|
||||
|
||||
o(errored()).equals(undefined)
|
||||
o(errored.error().message).equals("error")
|
||||
})
|
||||
o("error() removes error on valid value", function() {
|
||||
var stream = Stream.stream("a")
|
||||
var doubled = Stream.combine(function(stream) {
|
||||
if (typeof stream() !== "number") throw new Error("error")
|
||||
else return stream() * 2
|
||||
}, [stream])
|
||||
|
||||
stream(3)
|
||||
|
||||
o(doubled()).equals(6)
|
||||
o(doubled.error()).equals(undefined)
|
||||
})
|
||||
o("error() triggers catch", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(1)
|
||||
var handled = stream.catch(function() {
|
||||
count++
|
||||
return 2
|
||||
})
|
||||
|
||||
stream.error(new Error("error"))
|
||||
|
||||
o(handled()).equals(2)
|
||||
o(handled.error()).equals(undefined)
|
||||
o(count).equals(1)
|
||||
})
|
||||
o("thrown error propagates downstream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(1)
|
||||
.map(function() {throw new Error("error")})
|
||||
.map(function(value) {
|
||||
count++
|
||||
return value * 2
|
||||
})
|
||||
.map(function(value) {
|
||||
count++
|
||||
return value * 3
|
||||
})
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(stream.error().message).equals("error")
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("set error propagates downstream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream()
|
||||
var mapped = stream.map(function(value) {
|
||||
count++
|
||||
return value * 2
|
||||
})
|
||||
.map(function(value) {
|
||||
count++
|
||||
return value * 3
|
||||
})
|
||||
stream.error(new Error("error"))
|
||||
|
||||
o(mapped()).equals(undefined)
|
||||
o(mapped.error().message).equals("error")
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("error.map works", function() {
|
||||
var stream = Stream.stream(1)
|
||||
var mappedFromError = stream.error.map(function(value) {
|
||||
return "from" + value.message
|
||||
})
|
||||
|
||||
o(mappedFromError()).equals(undefined)
|
||||
|
||||
stream.error(new Error("error"))
|
||||
|
||||
o(mappedFromError()).equals("fromerror")
|
||||
})
|
||||
o("error from error.map propagates", function() {
|
||||
var stream = Stream.stream(1)
|
||||
var mappedFromError = stream.error.map(function(value) {
|
||||
return "from" + value.message
|
||||
}).map(function(value) {
|
||||
return "a" + value
|
||||
})
|
||||
|
||||
o(mappedFromError()).equals(undefined)
|
||||
|
||||
stream.error(new Error("error"))
|
||||
|
||||
o(mappedFromError()).equals("afromerror")
|
||||
})
|
||||
o("error thrown from error.map propagates downstream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(1)
|
||||
var mappedFromError = stream.error.map(function(value) {
|
||||
throw new Error("b")
|
||||
})
|
||||
|
||||
var downstream = mappedFromError.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(mappedFromError()).equals(undefined)
|
||||
|
||||
stream.error(new Error("a"))
|
||||
|
||||
o(mappedFromError()).equals(undefined)
|
||||
o(mappedFromError.error().message).equals("b")
|
||||
o(downstream()).equals(undefined)
|
||||
o(downstream.error().message).equals("b")
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("error.map absorbs streams", function() {
|
||||
var stream = Stream.reject(new Error("error"))
|
||||
var error = stream.error.map(function(value) {
|
||||
return Stream.stream(1)
|
||||
})
|
||||
|
||||
o(error()).equals(1)
|
||||
})
|
||||
})
|
||||
o.spec("reject", function() {
|
||||
o("reject works", function() {
|
||||
var stream = Stream.reject(new Error("error"))
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(stream.error().message).equals("error")
|
||||
})
|
||||
o("rejected propagates downstream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.reject(new Error("error"))
|
||||
.map(function(value) {
|
||||
count++
|
||||
return value * 2
|
||||
})
|
||||
.map(function(value) {
|
||||
count++
|
||||
return value * 3
|
||||
})
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(stream.error().message).equals("error")
|
||||
})
|
||||
o("rejected removes error on value", function() {
|
||||
var stream = Stream.reject(new Error("error"))
|
||||
var doubled = stream.map(function(value) {
|
||||
return value * 2
|
||||
})
|
||||
|
||||
stream(1)
|
||||
|
||||
o(doubled()).equals(2)
|
||||
o(stream.error()).equals(undefined)
|
||||
})
|
||||
o("combined rejected yields first error", function() {
|
||||
var count = 0
|
||||
var a = Stream.reject(new Error("a"))
|
||||
var b = Stream.reject(new Error("b"))
|
||||
var combined = Stream.combine(function(a, b) {
|
||||
count++
|
||||
return a() + b()
|
||||
}, [a, b])
|
||||
|
||||
o(combined()).equals(undefined)
|
||||
o(combined.error().message).equals("a")
|
||||
o(count).equals(0)
|
||||
})
|
||||
})
|
||||
o.spec("catch", function() {
|
||||
o("catch works from reject", function() {
|
||||
var count = 0
|
||||
var stream = Stream.reject(new Error("error")).catch(function(e) {
|
||||
count++
|
||||
return "no" + e.message
|
||||
}).map(function(value) {
|
||||
return value + "mapped"
|
||||
})
|
||||
|
||||
o(count).equals(1)
|
||||
o(stream()).equals("noerrormapped")
|
||||
o(stream.error()).equals(undefined)
|
||||
})
|
||||
o("catch works from combine", function() {
|
||||
var count = 0
|
||||
var stream = Stream.combine(function() {throw new Error("error")}, [Stream.stream(1)]).catch(function(e) {
|
||||
count++
|
||||
return "no" + e.message
|
||||
}).map(function(value) {
|
||||
return value + "mapped"
|
||||
})
|
||||
|
||||
o(count).equals(1)
|
||||
o(stream()).equals("noerrormapped")
|
||||
o(stream.error()).equals(undefined)
|
||||
})
|
||||
o("catch is not called if no error", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream()
|
||||
var handled = stream.map(function(value) {return value + value}).catch(function(e) {
|
||||
count++
|
||||
return "no" + e.message
|
||||
}).map(function(value) {
|
||||
return value + "mapped"
|
||||
})
|
||||
|
||||
stream("a")
|
||||
|
||||
o(count).equals(0)
|
||||
o(handled()).equals("aamapped")
|
||||
o(handled.error()).equals(undefined)
|
||||
})
|
||||
o("catch is not called if no error with default value", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream("a").map(function(value) {return value + value}).catch(function(e) {
|
||||
count++
|
||||
return "no" + e.message
|
||||
}).map(function(value) {
|
||||
return value + "mapped"
|
||||
})
|
||||
|
||||
o(count).equals(0)
|
||||
o(stream()).equals("aamapped")
|
||||
o(stream.error()).equals(undefined)
|
||||
})
|
||||
o("throwing from catch rejects", function() {
|
||||
var stream = Stream.reject(new Error("a")).catch(function(e) {
|
||||
throw new Error("b")
|
||||
})
|
||||
var mapped = stream.map(function(value) {return value + "ok"})
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(stream.error().message).equals("b")
|
||||
o(mapped()).equals(undefined)
|
||||
o(mapped.error().message).equals("b")
|
||||
})
|
||||
o("catch can return undefined", function() {
|
||||
var stream = Stream.reject(new Error("b")).catch(function(e) {}).map(function(value) {return String(value)})
|
||||
|
||||
o(stream()).equals("undefined")
|
||||
o(stream.error()).equals(undefined)
|
||||
})
|
||||
o("catch does not prevent sibling error propagation", function() {
|
||||
var a = Stream.reject(new Error("a"))
|
||||
var b = a.map(function(value) {return value + "b"}).catch(function(e) {})
|
||||
var c = a.map(function(value) {return value + "c"})
|
||||
var d = Stream.combine(function(b, c) {return b() + c()}, [b, c])
|
||||
|
||||
o(d()).equals(undefined)
|
||||
o(d.error().message).equals("a")
|
||||
})
|
||||
o("catches absorbed rejected stream", function() {
|
||||
var caught
|
||||
var stream = Stream.stream(1).map(function() {
|
||||
return Stream.reject(new Error("error"))
|
||||
}).catch(function(value) {
|
||||
caught = value
|
||||
return "no" + value.message
|
||||
}).map(function(value) {
|
||||
return value + "mapped"
|
||||
})
|
||||
|
||||
o(stream()).equals("noerrormapped")
|
||||
})
|
||||
})
|
||||
o.spec("map", function() {
|
||||
o("works", function() {
|
||||
var stream = Stream.stream()
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
|
||||
stream(3)
|
||||
|
||||
o(doubled()).equals(6)
|
||||
})
|
||||
o("works with default value", function() {
|
||||
var stream = Stream.stream(3)
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
|
||||
o(doubled()).equals(6)
|
||||
})
|
||||
o("works with undefined value", function() {
|
||||
var stream = Stream.stream()
|
||||
var mapped = stream.map(function(value) {return String(value)})
|
||||
|
||||
stream(undefined)
|
||||
|
||||
o(mapped()).equals("undefined")
|
||||
})
|
||||
o("works with default undefined value", function() {
|
||||
var stream = Stream.stream(undefined)
|
||||
var mapped = stream.map(function(value) {return String(value)})
|
||||
|
||||
o(mapped()).equals("undefined")
|
||||
})
|
||||
})
|
||||
o.spec("ap", function() {
|
||||
o("works", function() {
|
||||
var apply = Stream.stream(function(value) {return value * 2})
|
||||
var stream = Stream.stream(3)
|
||||
var applied = apply.ap(stream)
|
||||
|
||||
o(applied()).equals(6)
|
||||
|
||||
apply(function(value) {return value / 3})
|
||||
|
||||
o(applied()).equals(1)
|
||||
|
||||
stream(9)
|
||||
|
||||
o(applied()).equals(3)
|
||||
})
|
||||
o("works with undefined value", function() {
|
||||
var apply = Stream.stream(function(value) {return String(value)})
|
||||
var stream = Stream.stream(undefined)
|
||||
var applied = apply.ap(stream)
|
||||
|
||||
o(applied()).equals("undefined")
|
||||
|
||||
apply(function(value) {return String(value) + "a"})
|
||||
|
||||
o(applied()).equals("undefineda")
|
||||
})
|
||||
})
|
||||
o.spec("absorbing semantics", function() {
|
||||
o("absorbs stream", function() {
|
||||
var stream = Stream.stream(Stream.stream(1))
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
|
||||
o(stream()).equals(1)
|
||||
o(doubled()).equals(2)
|
||||
})
|
||||
o("absorbs stream on update", function() {
|
||||
var stream = Stream.stream()
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
|
||||
stream(Stream.stream(1))
|
||||
|
||||
o(stream()).equals(1)
|
||||
o(doubled()).equals(2)
|
||||
})
|
||||
o("absorbs errored stream", function() {
|
||||
var stream = Stream.stream(Stream.reject(1))
|
||||
var doubled = stream.error.map(function(value) {return value * 2})
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(stream.error()).equals(1)
|
||||
o(doubled()).equals(2)
|
||||
})
|
||||
o("absorbs pending stream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(Stream.stream())
|
||||
var mapped = stream.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("absorbs ended stream", function() {
|
||||
var count = 0
|
||||
var ended = Stream.stream()
|
||||
ended.end(true)
|
||||
|
||||
var stream = Stream.stream(ended)
|
||||
var mapped = stream.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
stream(1)
|
||||
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("combine absorbs stream", function() {
|
||||
var stream = Stream.stream(1)
|
||||
var combined = Stream.combine(function(stream) {
|
||||
return Stream.stream(2)
|
||||
}, [stream])
|
||||
var doubled = combined.map(function(value) {return value * 2})
|
||||
|
||||
o(combined()).equals(2)
|
||||
o(doubled()).equals(4)
|
||||
})
|
||||
o("combine absorbs errored stream", function() {
|
||||
var stream = Stream.stream(1)
|
||||
var combined = Stream.combine(function(stream) {
|
||||
return Stream.reject(2)
|
||||
}, [stream])
|
||||
var doubled = combined.error.map(function(value) {return value * 2})
|
||||
|
||||
o(combined()).equals(undefined)
|
||||
o(combined.error()).equals(2)
|
||||
o(doubled()).equals(4)
|
||||
})
|
||||
o("combine absorbs pending stream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(1)
|
||||
var combined = Stream.combine(function(stream) {
|
||||
return Stream.stream()
|
||||
}, [stream])
|
||||
var mapped = combined.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(combined()).equals(undefined)
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("combine absorbs ended stream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.stream(1)
|
||||
var combined = Stream.combine(function(stream) {
|
||||
var ended = Stream.stream(2)
|
||||
ended.end(true)
|
||||
return ended
|
||||
}, [stream])
|
||||
var mapped = combined.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(combined()).equals(2)
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("reject absorbs stream", function() {
|
||||
var stream = Stream.reject(Stream.stream(1))
|
||||
var doubled = stream.error.map(function(value) {return value * 2})
|
||||
|
||||
o(stream.error()).equals(1)
|
||||
o(doubled()).equals(2)
|
||||
})
|
||||
o("reject absorbs errored stream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.reject(Stream.reject(new Error("error")))
|
||||
var mapped = stream.error.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(stream.error().message).equals("error")
|
||||
o(count).equals(1)
|
||||
})
|
||||
o("reject absorbs pending stream", function() {
|
||||
var count = 0
|
||||
var stream = Stream.reject(Stream.stream())
|
||||
var mapped = stream.error.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(stream.error()).equals(undefined)
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("reject absorbs ended stream", function() {
|
||||
var count = 0
|
||||
var ended = Stream.stream(1)
|
||||
ended.end(true)
|
||||
|
||||
var stream = Stream.reject(ended)
|
||||
var mapped = stream.error.map(function() {
|
||||
count++
|
||||
})
|
||||
|
||||
o(count).equals(0)
|
||||
})
|
||||
o("ended stream absorbs stream", function() {
|
||||
var stream = Stream.stream()
|
||||
stream.end(true)
|
||||
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
stream(Stream.stream(1))
|
||||
|
||||
o(stream()).equals(1)
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
o("ended stream absorbs pending stream", function() {
|
||||
var stream = Stream.stream()
|
||||
stream.end(true)
|
||||
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
stream(Stream.stream())
|
||||
|
||||
o(stream()).equals(undefined)
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
o("ended stream absorbs errored stream", function() {
|
||||
var stream = Stream.stream()
|
||||
stream.end(true)
|
||||
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
stream(Stream.reject(new Error("error")))
|
||||
|
||||
o(stream.error().message).equals("error")
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
o("ended stream absorbs ended stream", function() {
|
||||
var stream = Stream.stream(1)
|
||||
stream.end(true)
|
||||
|
||||
var ended = Stream.stream(2)
|
||||
ended.end(true)
|
||||
|
||||
var doubled = stream.map(function(value) {return value * 2})
|
||||
stream(ended)
|
||||
|
||||
o(stream()).equals(2)
|
||||
o(doubled()).equals(undefined)
|
||||
})
|
||||
})
|
||||
o.spec("fantasy-land", function() {
|
||||
o.spec("functor", function() {
|
||||
o("identity", function() {
|
||||
var stream = Stream.stream(3)
|
||||
var mapped = stream.map(function(value) {return value})
|
||||
|
||||
o(stream()).equals(mapped())
|
||||
})
|
||||
o("composition", function() {
|
||||
function f(x) {return x * 2}
|
||||
function g(x) {return x * x}
|
||||
|
||||
var stream = Stream.stream(3)
|
||||
|
||||
var mapped = stream.map(function(value) {return f(g(value))})
|
||||
var composed = stream.map(g).map(f)
|
||||
|
||||
o(mapped()).equals(18)
|
||||
o(mapped()).equals(composed())
|
||||
})
|
||||
})
|
||||
o.spec("apply", function() {
|
||||
o("composition", function() {
|
||||
var a = Stream.stream(function(value) {return value * 2})
|
||||
var u = Stream.stream(function(value) {return value * 3})
|
||||
var v = Stream.stream(5)
|
||||
|
||||
var mapped = a.map(function(f) {
|
||||
return function(g) {
|
||||
return function(x) {
|
||||
return f(g(x))
|
||||
}
|
||||
}
|
||||
}).ap(u).ap(v)
|
||||
|
||||
var composed = a.ap(u.ap(v))
|
||||
|
||||
o(mapped()).equals(30)
|
||||
o(mapped()).equals(composed())
|
||||
})
|
||||
})
|
||||
o.spec("applicative", function() {
|
||||
o("identity", function() {
|
||||
var a = Stream.stream().of(function(value) {return value})
|
||||
var v = Stream.stream(5)
|
||||
|
||||
o(a.ap(v)()).equals(5)
|
||||
o(a.ap(v)()).equals(v())
|
||||
})
|
||||
o("homomorphism", function() {
|
||||
var a = Stream.stream(0)
|
||||
var f = function(value) {return value * 2}
|
||||
var x = 3
|
||||
|
||||
o(a.of(f).ap(a.of(x))()).equals(6)
|
||||
o(a.of(f).ap(a.of(x))()).equals(a.of(f(x))())
|
||||
})
|
||||
o("interchange", function() {
|
||||
var u = Stream.stream(function(value) {return value * 2})
|
||||
var a = Stream.stream()
|
||||
var y = 3
|
||||
|
||||
o(u.ap(a.of(y))()).equals(6)
|
||||
o(u.ap(a.of(y))()).equals(a.of(function(f) {return f(y)}).ap(u)())
|
||||
})
|
||||
})
|
||||
})
|
||||
})
|
||||
Loading…
Add table
Add a link
Reference in a new issue