[quickview] Add openQuickViewViaContextMenuSingleSelection test

Add a test checking that Quick View opens from the context menu
when in single selection mode.

Test: browser_tests --gtest_filter="*openQuickViewViaContextMenuSingleSelection"
Bug: 1038799
Change-Id: I569cea5e0ade7f1c9d4a614cfad3bc17d8b88a81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2015903
Commit-Queue: Noel Gordon <noel@chromium.org>
Reviewed-by: Noel Gordon <noel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#734489}

chrome/browser/chromeos/file_manager/file_manager_browsertest.cc

@@ -442,6 +442,7 @@ WRAPPED_INSTANTIATE_TEST_SUITE_P(
         TestCase("openQuickViewAndEscape"),
         TestCase("openQuickView").InGuestMode(),
         TestCase("openQuickView").TabletMode(),
+        TestCase("openQuickViewViaContextMenuSingleSelection"),
         TestCase("openQuickViewAudio"),
         TestCase("openQuickViewAudioWithImageMetadata"),
         TestCase("openQuickViewImage"),

ui/file_manager/integration_tests/file_manager/quick_view.js

@@ -208,6 +208,42 @@
         appId, ['#quick-view', '#open-button[hidden]']);
   };
 
+  /**
+   * Tests that Quick View opens via the context menu with a single selection.
+   */
+  testcase.openQuickViewViaContextMenuSingleSelection = async () => {
+    // Open Files app on Downloads containing ENTRIES.hello.
+    const appId =
+        await setupAndWaitUntilReady(RootPath.DOWNLOADS, [ENTRIES.hello], []);
+
+    // Right-click the file in the file-list.
+    const query = '#file-list [file-name="hello.txt"]';
+    chrome.test.assertTrue(!!await remoteCall.callRemoteTestUtil(
+        'fakeMouseRightClick', appId, [query]));
+
+    // Wait because WebUI Menu ignores the following click if it happens in
+    // <200ms from the previous click.
+    await wait(300);
+
+    // Click the file-list context menu "Get info" command.
+    const getInfoMenuItem = '#file-context-menu:not([hidden]) ' +
+        ' [command="#get-info"]:not([hidden])';
+    await remoteCall.simulateUiClick(appId, getInfoMenuItem);
+
+    // Check: the Quick View dialog should be shown.
+    const caller = getCaller();
+    await repeatUntil(async () => {
+      const query = ['#quick-view', '#dialog[open]'];
+      const elements = await remoteCall.callRemoteTestUtil(
+          'deepQueryAllElements', appId, [query, ['display']]);
+      const haveElements = Array.isArray(elements) && elements.length !== 0;
+      if (!haveElements || elements[0].styles.display !== 'block') {
+        return pending(caller, 'Waiting for Quick View to open.');
+      }
+      return true;
+    });
+  };
+
   /**
    * Tests opening then closing Quick View on a local downloads file.
    */