Upstream oodles of Chrome for Android code into Chromium.

chrome/android/javatests/src/org/chromium/chrome/browser/toolbar/ToolbarModelTest.java

+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package org.chromium.chrome.browser.toolbar;
+
+import android.test.suitebuilder.annotation.MediumTest;
+
+import com.google.android.apps.chrome.R;
+
+import junit.framework.Assert;
+
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.browser.ChromeTabbedActivity;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.test.ChromeTabbedActivityTestBase;
+import org.chromium.chrome.test.util.ChromeTabUtils;
+
+/**
+ * Tests for ToolbarModel.
+ */
+public class ToolbarModelTest extends ChromeTabbedActivityTestBase {
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityOnBlankPage();
+    }
+
+    /**
+     * After closing all {@link Tab}s, the {@link ToolbarModelImpl} should know that it is not
+     * showing any {@link Tab}.
+     * @throws InterruptedException
+     */
+    @Feature({"Android-Toolbar"})
+    @MediumTest
+    public void testClosingLastTabReflectedInModel() throws InterruptedException {
+        assertNotSame("No current tab", Tab.INVALID_TAB_ID,
+                getCurrentTabId(getActivity()));
+        ChromeTabUtils.closeCurrentTab(getInstrumentation(), getActivity());
+        assertEquals("Didn't close all tabs.", 0, ChromeTabUtils.getNumOpenTabs(getActivity()));
+        assertEquals("ToolbarModel is still trying to show a tab.", Tab.INVALID_TAB_ID,
+                getCurrentTabId(getActivity()));
+    }
+
+    /**
+     * @param activity A reference to {@link ChromeTabbedActivity} to pull
+     *            {@link android.view.View} data from.
+     * @return The id of the current {@link Tab} as far as the {@link ToolbarModelImpl} sees it.
+     */
+    public static int getCurrentTabId(final ChromeTabbedActivity activity) {
+        ToolbarLayout toolbar = (ToolbarLayout) activity.findViewById(R.id.toolbar);
+        Assert.assertNotNull("Toolbar is null", toolbar);
+
+        ToolbarDataProvider dataProvider = toolbar.getToolbarDataProvider();
+        Tab tab = dataProvider.getTab();
+        return tab != null ? tab.getId() : Tab.INVALID_TAB_ID;
+    }
+}