1 files changed, 52 insertions, 0 deletions
diff --git a/tests/unit_tests/handler_stack_test.coffee b/tests/unit_tests/handler_stack_test.coffee
new file mode 100644
index 00000000..0ed8f4c0
--- /dev/null
+++ b/tests/unit_tests/handler_stack_test.coffee
@@ -0,0 +1,52 @@
+require "./test_helper.js"
+extend(global, require "../../lib/handler_stack.js")
+
+context "handlerStack",
+  setup ->
+    stub global, "DomUtils", {}
+    stub DomUtils, "suppressEvent", ->
+    @handlerStack = new HandlerStack
+    @handler1Called = false
+    @handler2Called = false
+
+  should "bubble events", ->
+    @handlerStack.push { keydown: => @handler1Called = true }
+    @handlerStack.push { keydown: => @handler2Called = true }
+    @handlerStack.bubbleEvent 'keydown', {}
+    assert.isTrue @handler2Called
+    assert.isTrue @handler1Called
+
+  should "terminate bubbling on falsy return value", ->
+    @handlerStack.push { keydown: => @handler1Called = true }
+    @handlerStack.push { keydown: => @handler2Called = true; false }
+    @handlerStack.bubbleEvent 'keydown', {}
+    assert.isTrue @handler2Called
+    assert.isFalse @handler1Called
+
+  should "remove handlers correctly", ->
+    @handlerStack.push { keydown: => @handler1Called = true }
+    handlerId = @handlerStack.push { keydown: => @handler2Called = true }
+    @handlerStack.remove handlerId
+    @handlerStack.bubbleEvent 'keydown', {}
+    assert.isFalse @handler2Called
+    assert.isTrue @handler1Called
+
+  should "remove handlers correctly", ->
+    handlerId = @handlerStack.push { keydown: => @handler1Called = true }
+    @handlerStack.push { keydown: => @handler2Called = true }
+    @handlerStack.remove handlerId
+    @handlerStack.bubbleEvent 'keydown', {}
+    assert.isTrue @handler2Called
+    assert.isFalse @handler1Called
+
+  should "handle self-removing handlers correctly", ->
+    ctx = @
+    @handlerStack.push { keydown: => @handler1Called = true }
+    @handlerStack.push { keydown: ->
+      ctx.handler2Called = true
+      @remove()
+    }
+    @handlerStack.bubbleEvent 'keydown', {}
+    assert.isTrue @handler2Called
+    assert.isTrue @handler1Called
+    assert.equal @handlerStack.stack.length, 1