[TTS] Add a test for dictionary definitions.

Adds a test to exercise the UI when a dictionary definition is
returned by the server.

BUG=936695

Change-Id: I1b18ab395a402948377d541e828e14f51f170fe4
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1573862
Commit-Queue: Donn Denman <donnd@chromium.org>
Reviewed-by: Theresa <twellington@chromium.org>
Cr-Commit-Position: refs/heads/master@{#652673}

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -2983,6 +2983,28 @@ public class ContextualSearchManagerTest {
                 mActivityTestRule.getActivity().getActivityTab(), testUrl);
     }
 
+    /**
+     * Tests that the flow for showing a dictionary definition works, and that tapping in the
+     * bar just opens the panel instead of taking some action.
+     */
+    @Test
+    @SmallTest
+    @Feature({"ContextualSearch"})
+    public void testDictionaryDefinition() throws InterruptedException, TimeoutException {
+        // Simulate a tap to show the Bar, then set the quick action data.
+        simulateTapSearch("search");
+        TestThreadUtils.runOnUiThreadBlocking(
+                ()
+                        -> mPanel.onSearchTermResolved("obscure · əbˈskyo͝or", null, null,
+                                QuickActionCategory.NONE, CardTag.CT_DEFINITION));
+
+        // Tap on the main portion of the bar.
+        clickPanelBar();
+
+        // The panel should just expand open.
+        waitForPanelToExpand();
+    }
+
     /**
      * Tests accessibility mode: Tap and Long-press don't activate CS.
      */