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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-19 00:47:55 +0000
commit26a029d407be480d791972afb5975cf62c9360a6 (patch)
treef435a8308119effd964b339f76abb83a57c29483 /js/xpconnect/tests/unit/test_xpcwn_instanceof.js
parentInitial commit. (diff)
downloadfirefox-upstream/124.0.1.tar.xz
firefox-upstream/124.0.1.zip
Adding upstream version 124.0.1.upstream/124.0.1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'js/xpconnect/tests/unit/test_xpcwn_instanceof.js')
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1 files changed, 23 insertions, 0 deletions
diff --git a/js/xpconnect/tests/unit/test_xpcwn_instanceof.js b/js/xpconnect/tests/unit/test_xpcwn_instanceof.js
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+// Tests for custom `instanceof` behavior via XPC_SCRIPTABLE_WANT_HASINSTANCE.
+
+add_task(function id_instanceof() {
+ // ID objects are instances of Components.ID.
+ let id = Components.ID("{f2f5c784-7f6c-43f5-81b0-45ff32c312b1}");
+ Assert.equal(id instanceof Components.ID, true);
+ Assert.equal({} instanceof Components.ID, false);
+ Assert.equal(null instanceof Components.ID, false);
+
+ // Components.ID has a Symbol.hasInstance function.
+ let desc = Object.getOwnPropertyDescriptor(Components.ID, Symbol.hasInstance);
+ Assert.equal(typeof desc, "object");
+ Assert.equal(typeof desc.value, "function");
+
+ // Test error handling when calling this function with unexpected values.
+ Assert.throws(() => desc.value.call(null), /At least 1 argument required/);
+ Assert.throws(() => desc.value.call(null, 1), /unexpected this value/);
+ Assert.throws(() => desc.value.call({}, {}), /NS_ERROR_XPC_BAD_OP_ON_WN_PROTO/);
+});