Bug 1543071 - Test remote Target.closeTarget and targetDestroyed event r=ochameau

Depends on D35107

Differential Revision: https://phabricator.services.mozilla.com/D35108

--HG--
extra : moz-landing-system : lando

remote/test/browser/browser.ini

@@ -20,3 +20,4 @@ skip-if = os == "mac" || (verify && os == 'win') # bug 1547961
 [browser_session.js]
 [browser_tabs.js]
 [browser_target.js]
+[browser_target_close.js]

remote/test/browser/browser_target_close.js

@@ -0,0 +1,42 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+"use strict";
+
+const TEST_URI = "data:text/html;charset=utf-8,default-test-page";
+
+// Test the Target closeTarget method and the targetDestroyed event.
+add_task(async function() {
+  info("Start the CDP server");
+  RemoteAgent.listen(Services.io.newURI("http://localhost:9222"));
+  const CDP = await getCDP();
+  const client = await CDP({});
+
+  info("Setup Target domain");
+  const { Target } = client;
+  const targetCreated = Target.targetCreated();
+  Target.setDiscoverTargets({ discover: true });
+  await targetCreated;
+
+  info("Create a new tab and wait for the target to be created");
+  const otherTargetCreated = Target.targetCreated();
+  const tab = await BrowserTestUtils.openNewForegroundTab(gBrowser, TEST_URI);
+  const {targetInfo} = await otherTargetCreated;
+
+  const onTabClose = BrowserTestUtils.waitForEvent(tab, "TabClose");
+  const targetDestroyed = Target.targetDestroyed();
+
+  info("Close the target");
+  Target.closeTarget({ targetId: targetInfo.targetId });
+
+  await onTabClose;
+  ok(true, "Tab was closed");
+
+  await targetDestroyed;
+  ok(true, "Received the expected Target.targetDestroyed event");
+
+  await client.close();
+  ok(true, "The client is closed");
+
+  await RemoteAgent.close();
+});