[Offline indicator v2] Add instrumentation test for NTP

Bug: 1088069
Change-Id: I37b24a8f374d36f6d49d306748f59187b21e23d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2225552Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Sinan Sahin <sinansahin@google.com>
Cr-Commit-Position: refs/heads/master@{#774439}

chrome/android/BUILD.gn

@@ -925,6 +925,7 @@ android_library("chrome_test_java") {
     "//chrome/browser/ui/android/appmenu:java",
     "//chrome/browser/ui/android/appmenu/test:test_support_java",
     "//chrome/browser/ui/android/favicon:java",
+    "//chrome/browser/ui/android/native_page:java",
     "//chrome/browser/ui/messages/android:java",
     "//chrome/browser/util:java",
     "//chrome/test:sync_integration_test_support_java",

chrome/android/javatests/src/org/chromium/chrome/browser/status_indicator/StatusIndicatorTest.java

@@ -36,11 +36,14 @@ import org.chromium.chrome.R;
 import org.chromium.chrome.browser.flags.ChromeFeatureList;
 import org.chromium.chrome.browser.flags.ChromeSwitches;
 import org.chromium.chrome.browser.fullscreen.ChromeFullscreenManager;
+import org.chromium.chrome.browser.tab.Tab;
 import org.chromium.chrome.browser.tabbed_mode.TabbedRootUiCoordinator;
 import org.chromium.chrome.browser.tasks.tab_management.TabUiTestHelper;
 import org.chromium.chrome.test.ChromeJUnit4ClassRunner;
 import org.chromium.chrome.test.ChromeTabbedActivityTestRule;
+import org.chromium.chrome.test.util.NewTabPageTestUtils;
 import org.chromium.chrome.test.util.browser.Features;
+import org.chromium.components.embedder_support.util.UrlConstants;
 import org.chromium.content_public.browser.test.util.Criteria;
 import org.chromium.content_public.browser.test.util.CriteriaHelper;
 import org.chromium.content_public.browser.test.util.TestThreadUtils;
@@ -195,6 +198,48 @@ public class StatusIndicatorTest {
                 .check(matches(withTopMargin(mFullscreenManager.getTopControlsHeight())));
     }
 
+    @Test
+    @MediumTest
+    public void testShowAndHideOnNTP() {
+        mActivityTestRule.loadUrl(UrlConstants.NTP_URL);
+        Tab tab = mActivityTestRule.getActivity().getActivityTab();
+        NewTabPageTestUtils.waitForNtpLoaded(tab);
+        final int viewId = View.generateViewId();
+        final View view = tab.getNativePage().getView();
+        view.setId(viewId);
+
+        onView(withId(R.id.status_indicator)).check(matches(withEffectiveVisibility(GONE)));
+        onView(withId(R.id.control_container)).check(matches(withTopMargin(0)));
+        onView(withId(viewId)).check(matches(withTopMargin(0)));
+        Assert.assertFalse("Wrong initial composited view visibility.",
+                mStatusIndicatorSceneLayer.isSceneOverlayTreeShowing());
+
+        TestThreadUtils.runOnUiThreadBlocking(() -> mStatusIndicatorCoordinator.show(
+                "Status", null, Color.BLACK, Color.WHITE, Color.WHITE));
+
+        // The status indicator will be immediately visible.
+        onView(withId(R.id.status_indicator)).check(matches(withEffectiveVisibility(VISIBLE)));
+        onView(withId(R.id.control_container))
+                .check(matches(withTopMargin(mStatusIndicatorContainer.getHeight())));
+        onView(withId(viewId)).check(matches(withTopMargin(mStatusIndicatorContainer.getHeight())));
+
+        TestThreadUtils.runOnUiThreadBlocking(
+                () -> mStatusIndicatorCoordinator.updateContent("Exit status", null,
+                        Color.WHITE, Color.BLACK, Color.BLACK, () -> {}));
+
+        // #updateContent shouldn't change the layout.
+        onView(withId(R.id.status_indicator)).check(matches(withEffectiveVisibility(VISIBLE)));
+        onView(withId(R.id.control_container))
+                .check(matches(withTopMargin(mStatusIndicatorContainer.getHeight())));
+        onView(withId(viewId)).check(matches(withTopMargin(mStatusIndicatorContainer.getHeight())));
+
+        TestThreadUtils.runOnUiThreadBlocking(() -> mStatusIndicatorCoordinator.hide());
+
+        onView(withId(R.id.status_indicator)).check(matches(withEffectiveVisibility(GONE)));
+        onView(withId(R.id.control_container)).check(matches(withTopMargin(0)));
+        onView(withId(viewId)).check(matches(withTopMargin(0)));
+    }
+
     private static Matcher<View> withTopMargin(final int expected) {
         return new TypeSafeMatcher<View>() {
             private int mActual;