Upstream oodles of Chrome for Android code into Chromium.

chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java

Index: chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java
diff --git a/chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java b/chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..674beb21d226ab4b7886b15613716259cdcfa207
--- /dev/null
+++ b/chrome/android/javatests/src/org/chromium/chrome/browser/compositor/overlays/strip/TabStripTest.java
@@ -0,0 +1,648 @@
+// 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.compositor.overlays.strip;
+
+import static org.chromium.base.test.util.Restriction.RESTRICTION_TYPE_TABLET;
+
+import android.content.pm.ActivityInfo;
+import android.test.suitebuilder.annotation.LargeTest;
+
+import org.chromium.base.ThreadUtils;
+import org.chromium.base.test.util.DisabledTest;
+import org.chromium.base.test.util.Feature;
+import org.chromium.base.test.util.Restriction;
+import org.chromium.chrome.browser.Tab;
+import org.chromium.chrome.browser.compositor.layouts.components.CompositorButton;
+import org.chromium.chrome.browser.tabmodel.EmptyTabModelSelectorObserver;
+import org.chromium.chrome.browser.tabmodel.TabModel;
+import org.chromium.chrome.browser.tabmodel.TabModelSelectorObserver;
+import org.chromium.chrome.browser.tabmodel.TabModelUtils;
+import org.chromium.chrome.test.ChromeTabbedActivityTestBase;
+import org.chromium.chrome.test.util.ChromeTabUtils;
+import org.chromium.chrome.test.util.TabStripUtils;
+import org.chromium.content.browser.test.util.CallbackHelper;
+
+import java.util.concurrent.TimeoutException;
+
+/**
+ * Test suite for the TabStrip and making sure it properly represents the TabModel backend.
+ */
+public class TabStripTest extends ChromeTabbedActivityTestBase {
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityOnBlankPage();
+    }
+
+    /**
+     * Tests that the initial state of the system is good.  This is so the default TabStrips match
+     * the TabModels and we do not have to test this in further tests.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testInitialState() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that pressing the new tab button creates a new tab, properly updating the selected
+     * index.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip", "Main"})
+    public void testNewTabButtonWithOneTab() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        assertEquals("Expected original tab to be selected",
+                getActivity().getTabModelSelector().getModel(false).index(), 0);
+
+        ChromeTabUtils.clickNewTabButton(this, this);
+
+        getInstrumentation().waitForIdleSync();
+        assertEquals("Expected two tabs to exist",
+                getActivity().getTabModelSelector().getModel(false).getCount(), 2);
+        compareAllTabStripsWithModel();
+        assertEquals("Expected second tab to be selected",
+                getActivity().getTabModelSelector().getModel(false).index(), 1);
+    }
+
+    /**
+     * Tests that pressing the new tab button creates a new tab when many exist, properly updating
+     * the selected index.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testNewTabButtonWithManyTabs() throws InterruptedException {
+        ChromeTabUtils.newTabsFromMenu(getInstrumentation(), getActivity(), 3);
+        getInstrumentation().runOnMainSync(new Runnable() {
+            @Override
+            public void run() {
+                TabModelUtils.setIndex(getActivity().getTabModelSelector().getModel(false), 0);
+            }
+        });
+        getInstrumentation().waitForIdleSync();
+        assertEquals("Expected original tab to be selected",
+                getActivity().getTabModelSelector().getModel(false).index(), 0);
+        compareAllTabStripsWithModel();
+
+        ChromeTabUtils.clickNewTabButton(this, this);
+
+        getInstrumentation().waitForIdleSync();
+        assertEquals("Expected five tabs to exist",
+                getActivity().getTabModelSelector().getModel(false).getCount(), 5);
+        assertEquals("Expected last tab to be selected",
+                getActivity().getTabModelSelector().getModel(false).index(), 4);
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that creating a new tab from the menu properly updates the TabStrip.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testNewTabFromMenu() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        compareAllTabStripsWithModel();
+        ChromeTabUtils.newTabFromMenu(getInstrumentation(), getActivity());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("Expected two tabs to exist",
+                getActivity().getTabModelSelector().getModel(false).getCount(), 2);
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that creating a new incognito from the menu properly updates the TabStrips and
+     * activates the incognito TabStrip.
+     * @throws InterruptedException
+     */
+    /*
+     * @LargeTest
+     * @Restriction(RESTRICTION_TYPE_TABLET)
+     * @Feature({"TabStrip"})
+     * Bug crbug.com/258495
+     */
+    @DisabledTest
+    public void testNewIncognitoTabFromMenuAtNormalStrip() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        compareAllTabStripsWithModel();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        assertEquals("Expected normal model to have one tab",
+                getActivity().getTabModelSelector().getModel(false).getCount(), 1);
+        assertEquals("Expected incognito model to have one tab",
+                getActivity().getTabModelSelector().getModel(false).getCount(), 1);
+    }
+
+    /**
+     * Tests that selecting a tab properly selects the new tab.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testSelectWithTwoTabs() throws InterruptedException {
+        ChromeTabUtils.newTabFromMenu(getInstrumentation(), getActivity());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("The second tab is not selected",
+                getActivity().getCurrentTabModel().index(), 1);
+        selectTab(false, getActivity().getCurrentTabModel().getTabAt(0).getId());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("The first tab is not selected",
+                getActivity().getCurrentTabModel().index(), 0);
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that selecting a tab properly selects the new tab with many present.  This lets us
+     * also check that the visible tab ordering is correct.
+     * @throws InterruptedException
+     */
+    /*
+     * @LargeTest
+     * @Restriction(RESTRICTION_TYPE_TABLET)
+     * @Feature({"TabStrip"})
+     * Bug crbug.com/258495
+     */
+    @DisabledTest
+    public void testSelectWithManyTabs() throws InterruptedException {
+        ChromeTabUtils.newTabsFromMenu(getInstrumentation(), getActivity(), 4);
+        getInstrumentation().waitForIdleSync();
+        assertEquals("The last tab is not selected",
+                getActivity().getCurrentTabModel().index(), 4);
+        compareAllTabStripsWithModel();
+        selectTab(false, getActivity().getCurrentTabModel().getTabAt(2).getId());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("The middle tab is not selected",
+                getActivity().getCurrentTabModel().index(), 2);
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests closing a tab when there are two tabs open.  The remaining tab should still be
+     * selected.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testCloseTabWithTwoTabs() throws InterruptedException {
+        ChromeTabUtils.newTabFromMenu(getInstrumentation(), getActivity());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not two tabs present",
+                getActivity().getCurrentTabModel().getCount(), 2);
+        assertEquals("The second tab is not selected",
+                getActivity().getCurrentTabModel().index(), 1);
+        int initialSelectedId = getActivity().getActivityTab().getId();
+        closeTab(false, getActivity().getCurrentTabModel().getTabAt(0).getId());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There is not one tab present",
+                getActivity().getCurrentTabModel().getCount(), 1);
+        assertEquals("The wrong tab index is selected after close",
+                getActivity().getCurrentTabModel().index(), 0);
+        assertEquals("Same tab not still selected", initialSelectedId,
+                getActivity().getActivityTab().getId());
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests closing a tab when there are many tabs open.  The remaining tab should still be
+     * selected, even if the index has changed.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testCloseTabWithManyTabs() throws InterruptedException {
+        getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+
+        ChromeTabUtils.newTabsFromMenu(getInstrumentation(), getActivity(), 4);
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not five tabs present",
+                getActivity().getCurrentTabModel().getCount(), 5);
+        assertEquals("The last tab is not selected",
+                getActivity().getCurrentTabModel().index(), 4);
+        int initialSelectedId = getActivity().getActivityTab().getId();
+        closeTab(false, getActivity().getCurrentTabModel().getTabAt(2).getId());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not four tabs present",
+                getActivity().getCurrentTabModel().getCount(), 4);
+        assertEquals("The wrong tab index is selected after close",
+                getActivity().getCurrentTabModel().index(), 3);
+        assertEquals("Same tab not still selected", initialSelectedId,
+                getActivity().getActivityTab().getId());
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that closing the selected tab properly closes the current tab and updates to a new
+     * selected tab.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testCloseSelectedTab() throws InterruptedException {
+        ChromeTabUtils.newTabFromMenu(getInstrumentation(), getActivity());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not two tabs present",
+                getActivity().getCurrentTabModel().getCount(), 2);
+        assertEquals("The second tab is not selected",
+                getActivity().getCurrentTabModel().index(), 1);
+        int newSelectionId = getActivity().getCurrentTabModel().getTabAt(0).getId();
+        closeTab(false, getActivity().getCurrentTabModel().getTabAt(1).getId());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There is not one tab present",
+                getActivity().getCurrentTabModel().getCount(), 1);
+        assertEquals("The wrong tab index is selected after close",
+                getActivity().getCurrentTabModel().index(), 0);
+        assertEquals("New tab not selected", newSelectionId,
+                getActivity().getActivityTab().getId());
+        compareAllTabStripsWithModel();
+    }
+
+    /**
+     * Tests that selecting "Close all tabs" from the tab menu closes all tabs.
+     * Also tests that long press on close button selects the tab and displays the menu.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testCloseAllTabsFromTabMenuClosesAllTabs() throws InterruptedException {
+        // 1. Create a second tab
+        ChromeTabUtils.newTabFromMenu(getInstrumentation(), getActivity());
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not two tabs present",
+                2, getActivity().getCurrentTabModel().getCount());
+        assertEquals("The second tab is not selected",
+                1, getActivity().getCurrentTabModel().index());
+
+        // 2. Display tab menu on first tab
+        int tabSelectionId = getActivity().getCurrentTabModel().getTabAt(0).getId();
+        longPressCloseTab(false, tabSelectionId);
+        getInstrumentation().waitForIdleSync();
+        assertEquals("There are not two tabs present",
+                2, getActivity().getCurrentTabModel().getCount());
+        assertEquals("The wrong tab index is selected after long press",
+                0, getActivity().getCurrentTabModel().index());
+        assertEquals("Long pressed tab not selected",
+                tabSelectionId, getActivity().getActivityTab().getId());
+
+        // 3. Invoke "close all tabs" menu action; block until action is completed
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                TabStripUtils.getActiveStripLayoutHelper(getActivity()).clickTabMenuItem(
+                        StripLayoutHelper.ID_CLOSE_ALL_TABS);
+            }
+        });
+
+        // 4. Ensure all tabs were closed
+        assertEquals("Expected no tabs to be present",
+                0, getActivity().getCurrentTabModel().getCount());
+    }
+
+    /**
+     * Tests that the tab menu is dismissed when the orientation changes and no tabs
+     * are closed.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testTabMenuDismissedOnOrientationChange() throws InterruptedException {
+        // 1. Set orientation to portrait
+        getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+        getInstrumentation().waitForIdleSync();
+
+        // 2. Open tab menu
+        int tabSelectionId = getActivity().getCurrentTabModel().getTabAt(0).getId();
+        longPressCloseTab(false, tabSelectionId);
+        getInstrumentation().waitForIdleSync();
+
+        // 3. Set orientation to landscape and assert tab menu is not showing
+        getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
+        getInstrumentation().waitForIdleSync();
+        assertFalse(TabStripUtils.getActiveStripLayoutHelper(getActivity()).isTabMenuShowing());
+        assertEquals("Expected 1 tab to be present",
+                1, getActivity().getCurrentTabModel().getCount());
+
+        // 4. Reset orientation
+        getActivity().setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);
+        getInstrumentation().waitForIdleSync();
+    }
+
+    /**
+     * Tests that pressing the incognito toggle button properly switches between the incognito
+     * and normal TabStrips.
+     * @throws InterruptedException
+     */
+    /*
+     * @LargeTest
+     * @Restriction(RESTRICTION_TYPE_TABLET)
+     * @Feature({"TabStrip"})
+     * Bug crbug.com/258495
+     */
+    @DisabledTest
+    public void testToggleIncognitoMode() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        compareAllTabStripsWithModel();
+        clickIncognitoToggleButton();
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        compareAllTabStripsWithModel();
+        clickIncognitoToggleButton();
+        getInstrumentation().waitForIdleSync();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+    }
+
+    /**
+     * Tests that closing the last incognito tab properly closes the incognito TabStrip and
+     * switches to the normal TabStrip.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Feature({"TabStrip"})
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    public void testCloseLastIncognitoTab() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        closeTab(true, TabModelUtils.getCurrentTab(
+                getActivity().getTabModelSelector().getModel(true)).getId());
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        assertEquals("Expected incognito strip to have no tabs",
+                getActivity().getTabModelSelector().getModel(true).getCount(), 0);
+    }
+
+    /**
+     * Tests that closing all incognito tab properly closes the incognito TabStrip and
+     * switches to the normal TabStrip.
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Feature({"TabStrip"})
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    public void testCloseAllIncognitoTabsFromTabMenu() throws InterruptedException {
+        //1. Create two incognito tabs
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        assertEquals("Expected incognito strip to have 2 tabs",
+                2, getActivity().getTabModelSelector().getModel(true).getCount());
+
+        // 2. Open tab menu
+        int tabSelectionId =  TabModelUtils.getCurrentTab(
+                getActivity().getTabModelSelector().getModel(true)).getId();
+        longPressCloseTab(true, tabSelectionId);
+        getInstrumentation().waitForIdleSync();
+
+        // 3. Invoke menu action; block until action is completed
+        ThreadUtils.runOnUiThreadBlocking(new Runnable() {
+            @Override
+            public void run() {
+                TabStripUtils.getActiveStripLayoutHelper(getActivity()).clickTabMenuItem(
+                        StripLayoutHelper.ID_CLOSE_ALL_TABS);
+            }
+        });
+
+        // 4. Ensure all incognito tabs were closed and TabStrip is switched to normal
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        assertEquals("Expected normal strip to have 1 tab",
+                1, getActivity().getTabModelSelector().getModel(false).getCount());
+        assertEquals("Expected incognito strip to have no tabs",
+                0, getActivity().getTabModelSelector().getModel(true).getCount());
+    }
+
+    /**
+     * Test that switching a tab and quickly changing the model stays on the correct new tab/model
+     * when the tab finishes loading (when the GL overlay goes away).
+     * @throws InterruptedException
+     */
+    @LargeTest
+    @Restriction(RESTRICTION_TYPE_TABLET)
+    @Feature({"TabStrip"})
+    public void testTabSelectionViewDoesNotBreakModelSwitch() throws InterruptedException {
+        getInstrumentation().waitForIdleSync();
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        getInstrumentation().waitForIdleSync();
+        assertTrue("Expected incognito strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+        newIncognitoTabFromMenu();
+        ChromeTabUtils.switchTabInCurrentTabModel(getActivity(), 0);
+
+        clickIncognitoToggleButton();
+
+        assertFalse("Expected normal strip to be selected",
+                getActivity().getTabModelSelector().isIncognitoSelected());
+    }
+
+    /**
+     * Take a model index and figure out which index it will be in the TabStrip's view hierarchy.
+     * @param tabCount The number of tabs.
+     * @param selectedIndex The index of the selected tab.
+     * @param modelPos The position in the model we want to map.
+     * @return The position in the view hierarchy that represents the tab at modelPos.
+     */
+    private int mapModelToViewIndex(int tabCount, int selectedIndex, int modelPos) {
+        if (modelPos < selectedIndex) {
+            return modelPos;
+        } else if (modelPos == selectedIndex) {
+            return tabCount - 1;
+        } else {
+            return tabCount - 1 - modelPos + selectedIndex;
+        }
+    }
+
+    /**
+     * Simulates a click to the incognito toggle button.
+     */
+    protected void clickIncognitoToggleButton() throws InterruptedException {
+        final CallbackHelper tabModelSelectedCallback = new CallbackHelper();
+        TabModelSelectorObserver observer = new EmptyTabModelSelectorObserver() {
+            @Override
+            public void onTabModelSelected(TabModel newModel, TabModel oldModel) {
+                tabModelSelectedCallback.notifyCalled();
+            }
+        };
+        getActivity().getTabModelSelector().addObserver(observer);
+        StripLayoutHelperManager manager = TabStripUtils.getStripLayoutHelperManager(getActivity());
+        TabStripUtils.clickCompositorButton(manager.getModelSelectorButton(), this);
+        try {
+            tabModelSelectedCallback.waitForCallback(0);
+        } catch (TimeoutException e) {
+            fail("Tab model selected event never occurred.");
+        }
+        getActivity().getTabModelSelector().removeObserver(observer);
+    }
+
+    /**
+     * Simulates a click on a tab, selecting it.
+     * @param incognito Whether or not this tab is in the incognito or normal stack.
+     * @param id The id of the tab to click.
+     */
+    protected void selectTab(final boolean incognito, final int id) throws InterruptedException {
+        ChromeTabUtils.selectTabWithAction(getInstrumentation(), getActivity(), new Runnable() {
+            @Override
+            public void run() {
+                TabStripUtils.clickTab(
+                        TabStripUtils.findStripLayoutTab(getActivity(), incognito, id),
+                        TabStripTest.this);
+            }
+        });
+    }
+
+    /**
+     * Simulates a click on the close button of a tab.
+     * @param incognito Whether or not this tab is in the incognito or normal stack.
+     * @param id The id of the tab to click.
+     */
+    protected void closeTab(final boolean incognito, final int id) throws InterruptedException {
+        ChromeTabUtils.closeTabWithAction(getInstrumentation(), getActivity(), new Runnable() {
+            @Override
+            public void run() {
+                StripLayoutTab tab = TabStripUtils.findStripLayoutTab(
+                        getActivity(), incognito, id);
+                TabStripUtils.clickCompositorButton(tab.getCloseButton(), TabStripTest.this);
+            }
+        });
+    }
+
+    /**
+     * Simulates a long press on the close button of a tab. Asserts that the tab
+     * is selected and the tab menu is showing.
+     * @param incognito Whether or not this tab is in the incognito or normal stack.
+     * @param id The id of the tab to click.
+     */
+    protected void longPressCloseTab(final boolean incognito, final int id)
+            throws InterruptedException {
+        ChromeTabUtils.selectTabWithAction(getInstrumentation(), getActivity(), new Runnable() {
+            @Override
+            public void run() {
+                StripLayoutTab tab = TabStripUtils.findStripLayoutTab(
+                        getActivity(), incognito, id);
+                TabStripUtils.longPressCompositorButton(tab.getCloseButton(), TabStripTest.this);
+            }
+        });
+        assertTrue(TabStripUtils.getActiveStripLayoutHelper(getActivity()).isTabMenuShowing());
+    }
+
+    /**
+     * Compares a TabView with the corresponding model Tab.  This tries to compare as many
+     * features as possible making sure the TabView properly mirrors the Tab it represents.
+     * @param incognito Whether or not this tab is incognito or not.
+     * @param id The id of the tab to compare.
+     */
+    protected void compareTabViewWithModel(boolean incognito, int id) {
+        TabModel model = getActivity().getTabModelSelector().getModel(incognito);
+        Tab tab = TabModelUtils.getTabById(model, id);
+        StripLayoutHelper tabStrip = TabStripUtils.getStripLayoutHelper(getActivity(), incognito);
+        StripLayoutTab tabView = TabStripUtils.findStripLayoutTab(getActivity(), incognito, id);
+
+        assertTrue("One of Tab and TabView does not exist", (tabView == null && tab == null)
+                || (tabView != null && tab != null));
+
+        if (tabView == null || tab == null) return;
+
+        assertEquals("The IDs are not identical", tabView.getId(), tab.getId());
+
+        int assumedTabViewIndex = mapModelToViewIndex(model.getCount(), model.index(),
+                model.indexOf(tab));
+
+        assertEquals("The tab is not in the proper position ",
+                assumedTabViewIndex, tabStrip.visualIndexOfTab(tabView));
+
+        if (TabModelUtils.getCurrentTab(model) == tab
+                && getActivity().getTabModelSelector().isIncognitoSelected() == incognito) {
+            assertTrue("ChromeTab is not in the proper selection state",
+                    tabStrip.isForegroundTab(tabView));
+            assertEquals("ChromeTab is not completely visible, but is selected",
+                    tabView.getVisiblePercentage(), 1.0f);
+        }
+
+        // TODO(dtrainor): Compare favicon bitmaps?  Only compare a few pixels.
+    }
+
+    /**
+     * Compares an entire TabStrip with the corresponding TabModel.  This tries to compare
+     * as many features as possible, including checking all of the tabs through
+     * compareTabViewWithModel.  It also checks that the incognito indicator is visible if the
+     * incognito tab is showing.
+     * @param incognito Whether or not to check the incognito or normal TabStrip.
+     */
+    protected void compareTabStripWithModel(boolean incognito) {
+        TabModel model = getActivity().getTabModelSelector().getModel(incognito);
+        StripLayoutHelper strip = TabStripUtils.getStripLayoutHelper(getActivity(), incognito);
+        StripLayoutHelper activeStrip = TabStripUtils.getActiveStripLayoutHelper(getActivity());
+        TabModel activeModel = getActivity().getCurrentTabModel();
+
+        if (activeModel.isIncognito() == incognito) {
+            assertEquals("TabStrip is not in the right visible state", strip, activeStrip);
+            assertEquals("TabStrip does not have the same number of views as the model",
+                    strip.getTabCount(), model.getCount());
+        } else {
+            assertTrue("TabStrip is not in the right visible state", model != activeModel);
+        }
+
+        CompositorButton incognitoIndicator =
+                TabStripUtils.getStripLayoutHelperManager(getActivity()).getModelSelectorButton();
+        if (activeModel.isIncognito()) {
+            assertNotNull("Incognito indicator null in incognito mode", incognitoIndicator);
+            assertTrue("Incognito indicator not visible in incognito mode",
+                    incognitoIndicator.isVisible());
+        } else if (getActivity().getTabModelSelector().getModel(true).getCount() == 0) {
+            assertFalse("Incognito indicator visible in non incognito mode",
+                    incognitoIndicator.isVisible());
+        }
+
+        for (int i = 0; i < model.getCount(); ++i) {
+            compareTabViewWithModel(incognito, model.getTabAt(i).getId());
+        }
+    }
+
+    /**
+     * Compares all TabStrips with the corresponding TabModels.  This also checks if the incognito
+     * toggle is visible if necessary.
+     */
+    protected void compareAllTabStripsWithModel() {
+        compareTabStripWithModel(true);
+        compareTabStripWithModel(false);
+    }
+}