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-rw-r--r--addon-sdk/source/test/addons/e10s-tabs/lib/test-tab-observer.js46
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diff --git a/addon-sdk/source/test/addons/e10s-tabs/lib/test-tab-observer.js b/addon-sdk/source/test/addons/e10s-tabs/lib/test-tab-observer.js
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+++ b/addon-sdk/source/test/addons/e10s-tabs/lib/test-tab-observer.js
@@ -0,0 +1,46 @@
+/* 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/. */
+
+"use strict";
+
+// TODO Fennec support in Bug #894525
+module.metadata = {
+ "engines": {
+ "Firefox": "*"
+ }
+}
+
+const { openTab, closeTab } = require("sdk/tabs/utils");
+const { Loader } = require("sdk/test/loader");
+const { setTimeout } = require("sdk/timers");
+
+exports["test unload tab observer"] = function(assert, done) {
+ let loader = Loader(module);
+
+ let window = loader.require("sdk/deprecated/window-utils").activeBrowserWindow;
+ let observer = loader.require("sdk/tabs/observer").observer;
+ let opened = 0;
+ let closed = 0;
+
+ observer.on("open", function onOpen(window) { opened++; });
+ observer.on("close", function onClose(window) { closed++; });
+
+ // Open and close tab to trigger observers.
+ closeTab(openTab(window, "data:text/html;charset=utf-8,tab-1"));
+
+ // Unload the module so that all listeners set by observer are removed.
+ loader.unload();
+
+ // Open and close tab once again.
+ closeTab(openTab(window, "data:text/html;charset=utf-8,tab-2"));
+
+ // Enqueuing asserts to make sure that assertion is not performed early.
+ setTimeout(function () {
+ assert.equal(1, opened, "observer open was called before unload only");
+ assert.equal(1, closed, "observer close was called before unload only");
+ done();
+ }, 0);
+};
+
+// require("test").run(exports);