add test for #200

tests/mithril-tests.js

@@ -720,6 +720,30 @@ function testMithril(mock) {
 		m.render(root, m("div", [m("div")]))
 		return root.childNodes[0].childNodes.length == 1
 	})
+	test(function() {
+		//https://github.com/lhorie/mithril.js/issues/200
+		var root = mock.document.createElement("div")
+		
+		var unloaded1 = false
+		function unloadable1(element, isInit, context) {
+			context.onunload = function() {
+				unloaded1 = true
+			}
+		}
+		m.render(root, [ m("div", {config: unloadable1}) ])
+		m.render(root, [ ])
+		
+		var unloaded2 = false
+		function unloadable2(element, isInit, context) {
+			context.onunload = function() {
+				unloaded2 = true
+			}
+		}
+		m.render(root, [ m("div", {config: unloadable2}) ])
+		m.render(root, [ ])
+		
+		return unloaded1 === true && unloaded2 === true
+	})
 	//end m.render
 
 	//m.redraw