Bug 1457355 test that primary selection is unaffected by opening new tab r=dao

Differential Revision: https://phabricator.services.mozilla.com/D37354

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

browser/components/urlbar/tests/browser/browser.ini

@@ -72,6 +72,7 @@ skip-if = (os == 'mac' && os_version == '10.14') # bug 1554807
 tags = clipboard
 [browser_percent_encoded.js]
 [browser_populateAfterPushState.js]
+[browser_primary_selection_safe_on_new_tab.js]
 [browser_privateBrowsingWindowChange.js]
 [browser_raceWithTabs.js]
 skip-if = os == "linux" # Bug 1533807

browser/components/urlbar/tests/browser/browser_primary_selection_safe_on_new_tab.js

@@ -0,0 +1,74 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Verify that the primary selection is unaffected by opening a new tab.
+ *
+ * The steps here follow STR for regression
+ * https://bugzilla.mozilla.org/show_bug.cgi?id=1457355.
+ */
+
+"use strict";
+
+let tabs = [];
+let supportsPrimary = Services.clipboard.supportsSelectionClipboard();
+let ClipboardHelper = Cc["@mozilla.org/widget/clipboardhelper;1"].getService(
+  Ci.nsIClipboardHelper
+);
+const NON_EMPTY_URL = "data:text/html,Hello";
+const TEXT_FOR_PRIMARY = "Text for PRIMARY selection";
+
+add_task(async function() {
+  tabs.push(
+    await BrowserTestUtils.openNewForegroundTab(gBrowser, NON_EMPTY_URL)
+  );
+
+  // Bug 1457355 reproduced only when the url had a non-empty selection.
+  gURLBar.select();
+  Assert.equal(gURLBar.inputField.selectionStart, 0);
+  Assert.equal(
+    gURLBar.inputField.selectionEnd,
+    gURLBar.inputField.value.length
+  );
+
+  if (supportsPrimary) {
+    ClipboardHelper.copyStringToClipboard(
+      TEXT_FOR_PRIMARY,
+      Services.clipboard.kSelectionClipboard
+    );
+  }
+
+  tabs.push(
+    await BrowserTestUtils.openNewForegroundTab({
+      gBrowser,
+      opening: () => {
+        // Simulate tab open from user input such as keyboard shortcut or new
+        // tab button.
+        let userInput = window.windowUtils.setHandlingUserInput(true);
+        try {
+          BrowserOpenTab();
+        } finally {
+          userInput.destruct();
+        }
+      },
+      waitForLoad: false,
+    })
+  );
+
+  if (!supportsPrimary) {
+    info("Primary selection not supported. Skipping assertion.");
+    return;
+  }
+
+  let primaryAsText = SpecialPowers.getClipboardData(
+    "text/unicode",
+    SpecialPowers.Ci.nsIClipboard.kSelectionClipboard
+  );
+  Assert.equal(primaryAsText, TEXT_FOR_PRIMARY);
+});
+
+registerCleanupFunction(() => {
+  for (let tab of tabs) {
+    BrowserTestUtils.removeTab(tab);
+  }
+});