Upstream oodles of Chrome for Android code into Chromium.

chrome/android/javatests/src/org/chromium/chrome/browser/FocusedEditableTextFieldZoomTest.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;
+
+import static org.chromium.content.browser.test.util.CriteriaHelper.DEFAULT_POLLING_INTERVAL;
+
+import android.view.KeyEvent;
+
+import org.chromium.base.test.util.DisabledTest;
+import org.chromium.base.test.util.Feature;
+import org.chromium.chrome.test.ChromeActivityTestCaseBase;
+import org.chromium.chrome.test.util.TestHttpServerClient;
+import org.chromium.content.browser.ContentViewCore;
+import org.chromium.content.browser.test.util.Criteria;
+import org.chromium.content.browser.test.util.CriteriaHelper;
+import org.chromium.content.browser.test.util.DOMUtils;
+import org.chromium.content.browser.test.util.KeyUtils;
+
+public class FocusedEditableTextFieldZoomTest extends ChromeActivityTestCaseBase<ChromeActivity> {
+    private static final int TEST_TIMEOUT = 5000;
+    private static final String TEXTFIELD_DOM_ID = "textfield";
+    private static final float FLOAT_DELTA = 0.01f;
+    private static final float INITIAL_SCALE = 0.5f;
+
+    public FocusedEditableTextFieldZoomTest() {
+        super(ChromeActivity.class);
+    }
+
+    void waitForInitialZoom() throws InterruptedException {
+        // The zoom level sometimes changes immediately after the page loads which makes grabbing
+        // the initial value problematic. We solve this by explicitly specifying the initial zoom
+        // level via the viewport tag and waiting for the zoom level to reach that value before we
+        // proceed with the rest of the test.
+        final ContentViewCore contentViewCore = getActivity().getActivityTab().getContentViewCore();
+        CriteriaHelper.pollForCriteria(new Criteria() {
+            @Override
+            public boolean isSatisfied() {
+                return contentViewCore.getScale() - INITIAL_SCALE < FLOAT_DELTA;
+            }
+        }, TEST_TIMEOUT, DEFAULT_POLLING_INTERVAL);
+    }
+
+    private void waitForZoomIn(final ContentViewCore contentViewCore, final float initialZoomLevel)
+            throws InterruptedException {
+        CriteriaHelper.pollForCriteria(new Criteria() {
+            @Override
+            public boolean isSatisfied() {
+                return contentViewCore.getScale() > initialZoomLevel;
+            }
+        }, TEST_TIMEOUT, DEFAULT_POLLING_INTERVAL);
+    }
+
+    @DisabledTest
+    @Feature({"TabContents"})
+    /*
+     * @LargeTest
+     * Broken by subpixel precision changes crbug.com/371119
+     */
+    public void testZoomInToSelected() throws Throwable {
+        // This should focus the text field and initiate a zoom in.
+        Tab tab = getActivity().getActivityTab();
+        final ContentViewCore contentViewCore = tab.getContentViewCore();
+        float initialZoomLevel = contentViewCore.getScale();
+
+        DOMUtils.clickNode(this, contentViewCore, TEXTFIELD_DOM_ID);
+
+        // Wait for the zoom in to complete.
+        waitForZoomIn(contentViewCore, initialZoomLevel);
+    }
+
+    @DisabledTest
+    @Feature({"TabContents"})
+    /*
+     * @LargeTest
+     * Broken by subpixel precision changes crbug.com/371119
+     */
+    public void testZoomOutOfSelectedIfOnlyBackPressed() throws Throwable {
+        final Tab tab = getActivity().getActivityTab();
+        final ContentViewCore contentViewCore = tab.getContentViewCore();
+        final float initialZoomLevel = contentViewCore.getScale();
+
+        // This should focus the text field and initiate a zoom in.
+        DOMUtils.clickNode(this, contentViewCore, TEXTFIELD_DOM_ID);
+
+        // Wait for the zoom in to complete.
+        waitForZoomIn(contentViewCore, initialZoomLevel);
+
+        KeyUtils.singleKeyEventView(getInstrumentation(), tab.getView(), KeyEvent.KEYCODE_BACK);
+
+        // We should zoom out to the previous zoom level.
+        CriteriaHelper.pollForCriteria(new Criteria() {
+            @Override
+            public boolean isSatisfied() {
+                return (contentViewCore.getScale() - initialZoomLevel) < FLOAT_DELTA;
+            }
+        }, TEST_TIMEOUT, DEFAULT_POLLING_INTERVAL);
+    }
+
+    @Override
+    public void startMainActivity() throws InterruptedException {
+        startMainActivityWithURL(TestHttpServerClient.getUrl(
+                "chrome/test/data/android/focused_editable_zoom.html"));
+        waitForInitialZoom();
+    }
+}