From 3d02aeae368408d595fcf23e7d10e623c97ac6e4 Mon Sep 17 00:00:00 2001
From: Barney Carroll <barney.carroll@gmail.com>
Date: Thu, 14 Jul 2016 13:19:31 +0100
Subject: [PATCH 1/4] prop.toString method

---
 util/stream.js | 12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

diff --git a/util/stream.js b/util/stream.js
index 1897f72b..3abffcc8 100644
--- a/util/stream.js
+++ b/util/stream.js
@@ -7,18 +7,18 @@ function createStream() {
 		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.toJSON = toJSON
+	stream.valueOf = valueOf, stream.toJSON = toJSON, stream.toString = valueOf
 	stream.run = run, stream.catch = doCatch
-	
+
 	Object.defineProperties(stream, {
 		error: {get: function() {
 			if (!stream._state.errorStream) {
@@ -132,10 +132,10 @@ function initDependency(dep, streams, derive, recover) {
 	state.derive = derive
 	state.recover = recover
 	state.parents = streams.filter(notEnded)
-	
+
 	registerDependency(dep, state.parents)
 	updateDependency(dep, true)
-	
+
 	return dep
 }
 function registerDependency(stream, parents) {

From e6029a9a5c254e34e185e8dfe6000f7e2e16c0e5 Mon Sep 17 00:00:00 2001
From: Barney Carroll <barney.carroll@gmail.com>
Date: Thu, 14 Jul 2016 13:27:48 +0100
Subject: [PATCH 2/4] Compile results for test purposes

---
 mithril.js     |  8 +-------
 mithril.min.js | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 7 deletions(-)
 create mode 100644 mithril.min.js

diff --git a/mithril.js b/mithril.js
index ee63e707..a82f9524 100644
--- a/mithril.js
+++ b/mithril.js
@@ -7,18 +7,15 @@ function createStream() {
 		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.toJSON = toJSON
+	stream.valueOf = valueOf, stream.toJSON = toJSON, stream.toString = valueOf
 	stream.run = run, stream.catch = doCatch
-	
 	Object.defineProperties(stream, {
 		error: {get: function() {
 			if (!stream._state.errorStream) {
@@ -130,10 +127,8 @@ function initDependency(dep, streams, derive, recover) {
 	state.derive = derive
 	state.recover = recover
 	state.parents = streams.filter(notEnded)
-	
 	registerDependency(dep, state.parents)
 	updateDependency(dep, true)
-	
 	return dep
 }
 function registerDependency(stream, parents) {
@@ -1066,7 +1061,6 @@ m.route = function($window, renderer, pubsub) {
 	route.prefix = router.setPrefix
 	route.set = router.setPath
 	route.get = router.getPath
-	
 	return route
 }(window, renderService, redrawService)
 m.mount = function(renderer, pubsub) {
diff --git a/mithril.min.js b/mithril.min.js
new file mode 100644
index 00000000..7bb133aa
--- /dev/null
+++ b/mithril.min.js
@@ -0,0 +1,38 @@
+(function(){function y(){function a(){0<arguments.length&&G(a,arguments[0],void 0);return a._state.value}M(a,arguments);0<arguments.length&&G(a,arguments[0],void 0);return a}function M(a,b){a.constructor=y;a._state={id:Y++,value:void 0,error:void 0,state:0,derive:void 0,recover:void 0,deps:{},parents:[],errorStream:void 0,endStream:void 0};a.map=Z;a.ap=aa;a.of=y;a.valueOf=N;a.toJSON=ba;a.toString=N;a.run=ca;a["catch"]=da;Object.defineProperties(a,{error:{get:function(){if(!a._state.errorStream){var b=
+function(){0<arguments.length&&G(a,void 0,arguments[0]);return a._state.error};M(b,[]);C(b,[a],O,O);a._state.errorStream=b}return a._state.errorStream}},end:{get:function(){if(!a._state.endStream){var b=y();b.map(function(e){!0===e&&(P(a),P(b));return e});a._state.endStream=b}return a._state.endStream}}})}function G(a,b,h){D(a,b,h);for(var e in a._state.deps)Q(a._state.deps[e],!1);a._state.changed=!1;for(var f in a._state.deps)a._state.deps[f]._state.changed=!1}function D(a,b,h){h=R(b,h);if(void 0!==
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+return function(f){var k=(new Date).getTime();!0===f||0===b||16<=k-b?(b=k,a()):null===h&&(h=e(function(){h=null;a();b=(new Date).getTime()},16-(k-b)))}},X=function(a,b,h,e){var f=ja(e);null!=b&&b.setEventCallback(function(a){!1!==a.redraw&&f()});null!=h&&(a.redraw&&h.unsubscribe(a.redraw),h.subscribe(f));return a.redraw=f};n.route=function(a,b,h){var e=ia(a);a=function(a,k,l){var d=null,m=null;l=e.defineRoutes(l,function(e,h,k,l){if("function"!==typeof e.view){"function"!==typeof e.render&&(e.render=
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From f3a4a7e1eb0b06ee71de0891194ed9c802b68aeb Mon Sep 17 00:00:00 2001
From: Barney Carroll <barney.carroll@gmail.com>
Date: Thu, 14 Jul 2016 13:27:48 +0100
Subject: [PATCH 3/4] compile prop.toString method

---
 mithril.js     |  8 +-------
 mithril.min.js | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+), 7 deletions(-)
 create mode 100644 mithril.min.js

diff --git a/mithril.js b/mithril.js
index ee63e707..a82f9524 100644
--- a/mithril.js
+++ b/mithril.js
@@ -7,18 +7,15 @@ function createStream() {
 		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.toJSON = toJSON
+	stream.valueOf = valueOf, stream.toJSON = toJSON, stream.toString = valueOf
 	stream.run = run, stream.catch = doCatch
-	
 	Object.defineProperties(stream, {
 		error: {get: function() {
 			if (!stream._state.errorStream) {
@@ -130,10 +127,8 @@ function initDependency(dep, streams, derive, recover) {
 	state.derive = derive
 	state.recover = recover
 	state.parents = streams.filter(notEnded)
-	
 	registerDependency(dep, state.parents)
 	updateDependency(dep, true)
-	
 	return dep
 }
 function registerDependency(stream, parents) {
@@ -1066,7 +1061,6 @@ m.route = function($window, renderer, pubsub) {
 	route.prefix = router.setPrefix
 	route.set = router.setPath
 	route.get = router.getPath
-	
 	return route
 }(window, renderService, redrawService)
 m.mount = function(renderer, pubsub) {
diff --git a/mithril.min.js b/mithril.min.js
new file mode 100644
index 00000000..7bb133aa
--- /dev/null
+++ b/mithril.min.js
@@ -0,0 +1,38 @@
+(function(){function y(){function a(){0<arguments.length&&G(a,arguments[0],void 0);return a._state.value}M(a,arguments);0<arguments.length&&G(a,arguments[0],void 0);return a}function M(a,b){a.constructor=y;a._state={id:Y++,value:void 0,error:void 0,state:0,derive:void 0,recover:void 0,deps:{},parents:[],errorStream:void 0,endStream:void 0};a.map=Z;a.ap=aa;a.of=y;a.valueOf=N;a.toJSON=ba;a.toString=N;a.run=ca;a["catch"]=da;Object.defineProperties(a,{error:{get:function(){if(!a._state.errorStream){var b=
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+void 0,k)}}function R(a,b){null!=a&&a.constructor===y&&(b=void 0!==a._state.error?a._state.error:R(a._state.value,a._state.error));return b}function ca(a){var b=y(),h=this;return C(b,[h],function(){return U(b,a(h()))},void 0)}function da(a){var b=y(),h=this;return C(b,[h],function(){return h._state.value},function(){return U(b,a(h._state.error))})}function H(a,b){return C(y(),b,function(){var h=b.filter(T);if(0<h.length)throw h[0]._state.error;return a.apply(this,b.concat([b.filter(S)]))},void 0)}
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+a.history.replaceState(null,null,d+b):a.history.pushState(null,null,d+b),a.onpopstate()):a.location.href=d+b}var k="function"===typeof a.history.pushState&&"file:"!==a.location.protocol,l="function"===typeof setImmediate?setImmediate:setTimeout,d="#!";return{setPrefix:function(a){d=a},getPath:e,setPath:f,defineRoutes:function(b,f,p){function n(){var a=e(),d={},k=h(a,d,d);l(function(){for(var e in b){var h=new RegExp("^"+e.replace(/:[^\/]+?\.{3}/g,"(.*?)").replace(/:[^\/]+/g,"([^\\/]+)")+"/?$");if(h.test(k)){k.replace(h,
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+return function(f){var k=(new Date).getTime();!0===f||0===b||16<=k-b?(b=k,a()):null===h&&(h=e(function(){h=null;a();b=(new Date).getTime()},16-(k-b)))}},X=function(a,b,h,e){var f=ja(e);null!=b&&b.setEventCallback(function(a){!1!==a.redraw&&f()});null!=h&&(a.redraw&&h.unsubscribe(a.redraw),h.subscribe(f));return a.redraw=f};n.route=function(a,b,h){var e=ia(a);a=function(a,k,l){var d=null,m=null;l=e.defineRoutes(l,function(e,h,k,l){if("function"!==typeof e.view){"function"!==typeof e.render&&(e.render=
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From adaef70729f3b64dc046245eac55af283b8c4eb2 Mon Sep 17 00:00:00 2001
From: Barney Carroll <barney.carroll@gmail.com>
Date: Thu, 14 Jul 2016 14:23:01 +0100
Subject: [PATCH 4/4] Test use cases for prop valueOf & toString

---
 util/tests/test-stream.js | 269 ++++++++++++++++++++------------------
 1 file changed, 141 insertions(+), 128 deletions(-)

diff --git a/util/tests/test-stream.js b/util/tests/test-stream.js
index fabbf771..f7a2cacb 100644
--- a/util/tests/test-stream.js
+++ b/util/tests/test-stream.js
@@ -11,24 +11,24 @@ o.spec("stream", function() {
 			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("can be stream of streams", function() {
 			var stream = Stream.stream(Stream.stream(1))
-			
+
 			o(stream()()).equals(1)
 		})
 	})
@@ -36,41 +36,41 @@ o.spec("stream", 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() {
@@ -82,9 +82,9 @@ o.spec("stream", function() {
 				count++
 				return b() + c()
 			}, [b, c])
-			
+
 			a(3)
-			
+
 			o(d()).equals(15)
 			o(count).equals(1)
 		})
@@ -97,7 +97,7 @@ o.spec("stream", function() {
 				count++
 				return b() + c()
 			}, [b, c])
-			
+
 			o(d()).equals(15)
 			o(count).equals(1)
 		})
@@ -108,10 +108,10 @@ o.spec("stream", function() {
 			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)
 		})
@@ -122,9 +122,9 @@ o.spec("stream", function() {
 			var c = Stream.combine(function(a, b, changed) {
 				streams = changed
 			}, [a, b])
-			
+
 			a(7)
-			
+
 			o(streams.length).equals(1)
 			o(streams[0]).equals(a)
 		})
@@ -133,7 +133,7 @@ o.spec("stream", function() {
 			var b = Stream.combine(function(a) {
 				return undefined
 			}, [a])
-			
+
 			o(b()).equals(undefined)
 		})
 		o("combine can return stream", function() {
@@ -141,7 +141,7 @@ o.spec("stream", function() {
 			var b = Stream.combine(function(a) {
 				return Stream.stream(2)
 			}, [a])
-			
+
 			o(b()()).equals(2)
 		})
 		o("combine can return pending stream", function() {
@@ -149,7 +149,7 @@ o.spec("stream", function() {
 			var b = Stream.combine(function(a) {
 				return Stream.stream()
 			}, [a])
-			
+
 			o(b()()).equals(undefined)
 		})
 		o("combine can halt", function() {
@@ -162,7 +162,7 @@ o.spec("stream", function() {
 				count++
 				return 1
 			})
-			
+
 			o(b()).equals(undefined)
 		})
 	})
@@ -170,40 +170,40 @@ o.spec("stream", 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("upstream does not affect ended stream", function() {
 			var stream = Stream.stream(2)
 			var doubled = Stream.combine(function(stream) {return stream() * 2}, [stream])
-			
+
 			doubled.end(true)
-			
+
 			stream(4)
-			
+
 			o(doubled()).equals(4)
 		})
 	})
@@ -211,16 +211,16 @@ o.spec("stream", 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")
 		})
@@ -230,9 +230,9 @@ o.spec("stream", function() {
 				if (typeof stream() !== "number") throw new Error("error")
 				else return stream() * 2
 			}, [stream])
-			
+
 			stream(3)
-			
+
 			o(doubled()).equals(6)
 			o(doubled.error()).equals(undefined)
 		})
@@ -243,9 +243,9 @@ o.spec("stream", function() {
 				count++
 				return 2
 			})
-			
+
 			stream.error(new Error("error"))
-			
+
 			o(handled()).equals(2)
 			o(handled.error()).equals(undefined)
 			o(count).equals(1)
@@ -262,7 +262,7 @@ o.spec("stream", function() {
 					count++
 					return value * 3
 				})
-			
+
 			o(stream()).equals(undefined)
 			o(stream.error().message).equals("error")
 			o(count).equals(0)
@@ -279,7 +279,7 @@ o.spec("stream", function() {
 				return value * 3
 			})
 			stream.error(new Error("error"))
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("error")
 			o(count).equals(0)
@@ -289,11 +289,11 @@ o.spec("stream", function() {
 			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() {
@@ -304,11 +304,11 @@ o.spec("stream", function() {
 			.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() {
@@ -317,15 +317,15 @@ o.spec("stream", function() {
 			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)
@@ -341,7 +341,7 @@ o.spec("stream", function() {
 				count++
 				return 1
 			})
-			
+
 			o(stream()).equals(undefined)
 			o(count).equals(0)
 		})
@@ -350,7 +350,7 @@ o.spec("stream", function() {
 			var error = stream.error.map(function(value) {
 				return Stream.stream(1)
 			})
-			
+
 			o(error()()).equals(1)
 		})
 		o("combined stream of two errored streams adopts error from first", function() {
@@ -358,7 +358,7 @@ o.spec("stream", function() {
 			var b = Stream.combine(function(a) {throw new Error("error from b")}, [a])
 			var c = Stream.combine(function(a) {throw new Error("error from c")}, [a])
 			var d = Stream.combine(function(a, b) {return 2}, [a, b])
-			
+
 			o(d()).equals(undefined)
 			o(d.error().message).equals("error from b")
 		})
@@ -366,7 +366,7 @@ o.spec("stream", function() {
 	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")
 		})
@@ -381,7 +381,7 @@ o.spec("stream", function() {
 					count++
 					return value * 3
 				})
-			
+
 			o(stream()).equals(undefined)
 			o(stream.error().message).equals("error")
 		})
@@ -390,9 +390,9 @@ o.spec("stream", function() {
 			var doubled = stream.map(function(value) {
 				return value * 2
 			})
-			
+
 			stream(1)
-			
+
 			o(doubled()).equals(2)
 			o(stream.error()).equals(undefined)
 		})
@@ -404,7 +404,7 @@ o.spec("stream", function() {
 				count++
 				return a() + b()
 			}, [a, b])
-			
+
 			o(combined()).equals(undefined)
 			o(combined.error().message).equals("a")
 			o(count).equals(0)
@@ -414,29 +414,29 @@ o.spec("stream", function() {
 		o("works", function() {
 			var stream = Stream.stream()
 			var doubled = stream.run(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.run(function(value) {return value * 2})
-			
+
 			o(doubled()).equals(6)
 		})
 		o("works with undefined value", function() {
 			var stream = Stream.stream()
 			var mapped = stream.run(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.run(function(value) {return String(value)})
-			
+
 			o(mapped()).equals("undefined")
 		})
 		o("works with stream that throws", function() {
@@ -447,7 +447,7 @@ o.spec("stream", function() {
 				count++
 				return value
 			})
-			
+
 			o(errored()).equals(undefined)
 			o(errored.error().message).equals("error")
 			o(mapped()).equals(undefined)
@@ -462,20 +462,20 @@ o.spec("stream", function() {
 				count++
 				return value
 			})
-			
+
 			o(mapped()).equals(undefined)
 			o(count).equals(0)
 		})
 		o("works with active stream", function() {
 			var stream = Stream.stream(undefined)
 			var mapped = stream.run(function(value) {return Stream.stream(1)})
-			
+
 			o(mapped()).equals(1)
 		})
 		o("works with errored stream", function() {
 			var stream = Stream.stream(undefined)
 			var mapped = stream.run(function(value) {return Stream.reject(new Error("error"))})
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("error")
 		})
@@ -486,36 +486,36 @@ o.spec("stream", function() {
 				ended.end(true)
 				return ended
 			})
-			
+
 			stream(3)
-			
+
 			o(mapped()).equals(2)
 		})
 		o("works when active stream updates", function() {
 			var stream = Stream.stream(undefined)
 			var absorbed = Stream.stream(1)
 			var mapped = stream.run(function(value) {return absorbed})
-			
+
 			absorbed(2)
-			
+
 			o(mapped()).equals(2)
-			
+
 			absorbed(3)
-			
+
 			o(mapped()).equals(3)
 		})
 		o("works when updating stream to errored state", function() {
 			var stream = Stream.stream(undefined)
 			var absorbed = Stream.stream(1)
 			var mapped = stream.run(function(value) {return absorbed})
-			
+
 			absorbed.error(new Error("error"))
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("error")
-			
+
 			absorbed.error(new Error("another error"))
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("another error")
 		})
@@ -523,18 +523,18 @@ o.spec("stream", function() {
 			var stream = Stream.stream(undefined)
 			var absorbed = Stream.stream()
 			var mapped = stream.run(function(value) {return absorbed})
-			
+
 			absorbed(2)
-			
+
 			o(mapped()).equals(2)
 		})
 		o("works when updating pending stream to errored state", function() {
 			var stream = Stream.stream(undefined)
 			var absorbed = Stream.stream()
 			var mapped = stream.run(function(value) {return absorbed})
-			
+
 			absorbed.error(new Error("error"))
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("error")
 		})
@@ -542,14 +542,14 @@ o.spec("stream", function() {
 			var stream = Stream.stream(undefined)
 			var absorbed = Stream.stream(1)
 			var mapped = stream.run(function(value) {return absorbed})
-			
+
 			absorbed.error(new Error("error"))
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("error")
-			
+
 			absorbed(2)
-			
+
 			o(mapped()).equals(2)
 			o(mapped.error()).equals(undefined)
 		})
@@ -564,7 +564,7 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			o(count).equals(1)
 			o(stream()).equals("noerrormapped")
 			o(stream.error()).equals(undefined)
@@ -578,7 +578,7 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			o(count).equals(1)
 			o(stream()).equals("noerrormapped")
 			o(stream.error()).equals(undefined)
@@ -593,9 +593,9 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			stream("a")
-			
+
 			o(count).equals(0)
 			o(handled()).equals("aamapped")
 			o(handled.error()).equals(undefined)
@@ -609,7 +609,7 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			o(count).equals(0)
 			o(stream()).equals("aamapped")
 			o(stream.error()).equals(undefined)
@@ -619,7 +619,7 @@ o.spec("stream", function() {
 				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)
@@ -627,7 +627,7 @@ o.spec("stream", function() {
 		})
 		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)
 		})
@@ -641,7 +641,7 @@ o.spec("stream", function() {
 				count++
 				return String(value)
 			})
-			
+
 			o(mapped()).equals(undefined)
 			o(count).equals(0)
 		})
@@ -651,7 +651,7 @@ o.spec("stream", function() {
 				return stream
 			})
 			.map(function(value) {return String(value)})
-			
+
 			o(mapped()).equals("1")
 		})
 		o("catch absorbs errored stream", function() {
@@ -660,7 +660,7 @@ o.spec("stream", function() {
 				return stream
 			})
 			.map(function(value) {return String(value)})
-			
+
 			o(mapped()).equals(undefined)
 			o(mapped.error().message).equals("a")
 		})
@@ -669,7 +669,7 @@ o.spec("stream", function() {
 			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")
 		})
@@ -685,7 +685,7 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			o(stream()).equals("noerrormapped")
 		})
 		o("catches nested wrapped rejected stream", function() {
@@ -702,7 +702,7 @@ o.spec("stream", function() {
 			.map(function(value) {
 				return value + "mapped"
 			})
-			
+
 			o(stream()).equals("noerrormapped")
 		})
 	})
@@ -717,6 +717,19 @@ o.spec("stream", function() {
 			o(Stream.stream([1, 2, 3]).valueOf()).deepEquals([1, 2, 3])
 			o(Stream.stream().valueOf()).equals(undefined)
 		})
+		o("allows implicit value access in mathematical operations", function() {
+			o(Stream.stream(1) + Stream.stream(1)).equals(2)
+		})
+	})
+	o.spec("toString", function() {
+		o("aliases valueOf", function() {
+			var stream = Stream.stream(1)
+
+			o(stream.toString).equals(stream.valueOf)
+		})
+		o("allows implicit value access in string operations", function() {
+			o(Stream.stream("a") + Stream.stream("b")).equals("ab")
+		})
 	})
 	o.spec("toJSON", function() {
 		o("works", function() {
@@ -734,35 +747,35 @@ o.spec("stream", 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("works with pending stream", function() {
 			var stream = Stream.stream(undefined)
 			var mapped = stream.map(function(value) {return Stream.stream()})
-			
+
 			o(mapped()()).equals(undefined)
 		})
 	})
@@ -771,26 +784,26 @@ o.spec("stream", 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")
 		})
 	})
@@ -799,18 +812,18 @@ o.spec("stream", 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())
 			})
@@ -820,7 +833,7 @@ o.spec("stream", 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) {
@@ -828,9 +841,9 @@ o.spec("stream", function() {
 						}
 					}
 				}).ap(u).ap(v)
-				
+
 				var composed = a.ap(u.ap(v))
-				
+
 				o(mapped()).equals(30)
 				o(mapped()).equals(composed())
 			})
@@ -839,7 +852,7 @@ o.spec("stream", 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())
 			})
@@ -847,7 +860,7 @@ o.spec("stream", 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))())
 			})
@@ -855,10 +868,10 @@ o.spec("stream", 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)())
 			})
 		})
 	})
-})
\ No newline at end of file
+})