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-rw-r--r--dom/tests/mochitest/webcomponents/mochitest.ini2
-rw-r--r--dom/tests/mochitest/webcomponents/test_custom_element_uncatchable_exception.html37
2 files changed, 39 insertions, 0 deletions
diff --git a/dom/tests/mochitest/webcomponents/mochitest.ini b/dom/tests/mochitest/webcomponents/mochitest.ini
index 3559f33c1..f5d0f84ea 100644
--- a/dom/tests/mochitest/webcomponents/mochitest.ini
+++ b/dom/tests/mochitest/webcomponents/mochitest.ini
@@ -21,6 +21,8 @@ skip-if = true || stylo # disabled - See bug 1390396 and 1293844
[test_custom_element_throw_on_dynamic_markup_insertion.html]
[test_custom_element_get.html]
[test_custom_element_when_defined.html]
+[test_custom_element_uncatchable_exception.html]
+skip-if = !debug # TestFunctions only applied in debug builds
[test_nested_content_element.html]
[test_dest_insertion_points.html]
[test_dest_insertion_points_shadow.html]
diff --git a/dom/tests/mochitest/webcomponents/test_custom_element_uncatchable_exception.html b/dom/tests/mochitest/webcomponents/test_custom_element_uncatchable_exception.html
new file mode 100644
index 000000000..f60bf1674
--- /dev/null
+++ b/dom/tests/mochitest/webcomponents/test_custom_element_uncatchable_exception.html
@@ -0,0 +1,37 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=1407669
+-->
+<head>
+ <title>Test custom elements runtime exception</title>
+ <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1407669">Bug 1407669</a>
+<script type="text/javascript">
+
+SimpleTest.waitForExplicitFinish();
+SpecialPowers.pushPrefEnv({set: [['dom.expose_test_interfaces', true]]}, function() {
+ window.onerror = function (e) {
+ ok(false, "How did we get here!?");
+ }
+
+ class Foo extends HTMLElement {
+ constructor() {
+ super()
+ TestFunctions.throwUncatchableException();
+ }
+ }
+
+ customElements.define("test-custom-element", Foo);
+ let element = document.createElement("test-custom-element");
+ is(element instanceof HTMLUnknownElement, true, "It should be a HTMLUnknownElement when uncatchable exception throws in constructor");
+ ok(true, "Uncatchable exception should not report");
+ SimpleTest.finish();
+});
+
+</script>
+</body>
+</html>