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Diffstat (limited to 'testing/web-platform/tests/html/webappapis/scripting/events/eventhandler-cancellation.html')
-rw-r--r-- | testing/web-platform/tests/html/webappapis/scripting/events/eventhandler-cancellation.html | 76 |
1 files changed, 76 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/webappapis/scripting/events/eventhandler-cancellation.html b/testing/web-platform/tests/html/webappapis/scripting/events/eventhandler-cancellation.html new file mode 100644 index 0000000000..6be581fa24 --- /dev/null +++ b/testing/web-platform/tests/html/webappapis/scripting/events/eventhandler-cancellation.html @@ -0,0 +1,76 @@ +<!doctype html> +<meta charset=utf-8> +<title></title> +<script src=/resources/testharness.js></script> +<script src=/resources/testharnessreport.js></script> +<!-- A window to work with that won't trigger the harness exception detection + when we fire "error" events at it --> +<iframe style="display: none"></iframe> +<script> + test(function() { + var blob = new Blob([""]); + // Most targets disabled for now until + // https://github.com/whatwg/html/issues/2296 is sorted out. + var targets = [ frames[0] /*, document, document.documentElement, + new Worker(URL.createObjectURL(blob) */ ]; + // Event constructors also mostly disabled until + // https://github.com/whatwg/html/issues/2296 is sorted out. + var eventCtors = [ /* Event, */ ErrorEvent /*, MouseEvent */ ]; + var values = [true, false, "", "abc", {}, 0, 1, -1, null, undefined, + 2.5, NaN, Infinity, Symbol.toStringTag ]; + // Event types also mostly disabled pending + // https://github.com/whatwg/html/issues/2296 + var eventTypes = [ "error"/*, "click", "load"*/ ]; + + // Variables that keep track of which subtest we're running. + var curTarget; + var curValue; + var curCtor; + var curType; + + function defaultPreventedTester(event) { + var expectedValue; + if (curTarget === frames[0] && + curCtor === ErrorEvent && + curValue === true && + curType == "error") { + expectedValue = true; + } else { + // This will need adjusting once we allow more targets and event + // constructors above! + expectedValue = false; + } + var valueRepr; + if (typeof curValue == "string") { + valueRepr = '"' + curValue + '"'; + } else { + valueRepr = String(curValue); + } + test(function() { + assert_equals(event.defaultPrevented, expectedValue); + }, "Returning " + valueRepr + + " from " + String(curTarget) + "'s on" + curType + + " event handler while " + curCtor.name + + " is firing should" + + (expectedValue ? "" : " not") + + " cancel the event"); + } + + for (curCtor of eventCtors) { + for (curTarget of targets) { + for (curType of eventTypes) { + for (curValue of values) { + // We have to make sure that defaultPreventedTester is added after + // our event handler. + curTarget["on" + curType] = function() { return curValue; } + curTarget.addEventListener(curType, defaultPreventedTester); + var e = new curCtor(curType, { cancelable: true }); + curTarget.dispatchEvent(e); + curTarget["on" + curType] = null; + curTarget.removeEventListener(curType, defaultPreventedTester); + } + } + } + } + }, "event handler cancellation behavior"); +</script> |