| <!DOCTYPE html> |
| <meta charset=utf-8> |
| <title>EventListener::handleEvent()</title> |
| <script src="/resources/testharness.js"></script> |
| <script src="/resources/testharnessreport.js"></script> |
| <link rel="help" href="https://dom.spec.whatwg.org/#callbackdef-eventlistener"> |
| <div id=log></div> |
| <script> |
| setup({ allow_uncaught_exception: true }); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var eventListener = { |
| handleEvent: function(evt) { |
| var that = this; |
| t.step(function() { |
| assert_equals(evt.type, type); |
| assert_equals(evt.target, target); |
| assert_equals(evt.srcElement, target); |
| assert_equals(that, eventListener); |
| }); |
| }, |
| }; |
| |
| target.addEventListener(type, eventListener); |
| target.dispatchEvent(new Event(type)); |
| }, "calls `handleEvent` method of `EventListener`"); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var thrownError = { name: "test" }; |
| var uncaughtError; |
| var errorHandler = function(event) { |
| uncaughtError = event.error; |
| }; |
| |
| window.addEventListener("error", errorHandler); |
| t.add_cleanup(function() { |
| window.removeEventListener("error", errorHandler); |
| }); |
| |
| target.addEventListener(type, { |
| get handleEvent() { |
| throw thrownError; |
| }, |
| }); |
| |
| target.dispatchEvent(new Event(type)); |
| assert_equals(thrownError, uncaughtError); |
| }, "rethrows errors when getting `handleEvent`"); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var calls = 0; |
| |
| target.addEventListener(type, { |
| get handleEvent() { |
| calls++; |
| return function() {}; |
| }, |
| }); |
| |
| assert_equals(calls, 0); |
| target.dispatchEvent(new Event(type)); |
| target.dispatchEvent(new Event(type)); |
| assert_equals(calls, 2); |
| }, "performs `Get` every time event is dispatched"); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var calls = 0; |
| var eventListener = function() { calls++; }; |
| eventListener.handleEvent = t.unreached_func("`handleEvent` method should not be called on functions"); |
| |
| target.addEventListener(type, eventListener); |
| target.dispatchEvent(new Event(type)); |
| assert_equals(calls, 1); |
| }, "doesn't call `handleEvent` method on callable `EventListener`"); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var uncaughtError; |
| var errorHandler = function(event) { |
| uncaughtError = event.error; |
| }; |
| |
| window.addEventListener("error", errorHandler); |
| t.add_cleanup(function() { |
| window.removeEventListener("error", errorHandler); |
| }); |
| |
| target.addEventListener(type, { |
| handleEvent: null, |
| }); |
| |
| target.dispatchEvent(new Event(type)); |
| assert_true(uncaughtError instanceof TypeError); |
| }, "throws if `handleEvent` is falsy and not callable"); |
| |
| test(function(t) { |
| var type = "foo"; |
| var target = document.createElement("div"); |
| var uncaughtError; |
| var errorHandler = function(event) { |
| uncaughtError = event.error; |
| }; |
| |
| window.addEventListener("error", errorHandler); |
| t.add_cleanup(function() { |
| window.removeEventListener("error", errorHandler); |
| }); |
| |
| target.addEventListener(type, { |
| handleEvent: 1, |
| }); |
| |
| target.dispatchEvent(new Event(type)); |
| assert_true(uncaughtError instanceof TypeError); |
| }, "throws if `handleEvent` is thruthy and not callable"); |
| </script> |
