android_webview/javatests/src/org/chromium/android_webview/test/AndroidViewIntegrationTest.java - chromium/src - Git at Google

 // Copyright 2013 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.android_webview.test;

 import android.support.test.InstrumentationRegistry;
 import android.support.test.filters.SmallTest;
 import android.view.View;
 import android.view.ViewGroup.LayoutParams;
 import android.widget.LinearLayout;

 import org.junit.Assert;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;

 import org.chromium.android_webview.AwContents;
 import org.chromium.android_webview.AwContentsClient;
 import org.chromium.android_webview.AwLayoutSizer;
 import org.chromium.android_webview.test.util.CommonResources;
 import org.chromium.android_webview.test.util.GraphicsTestUtils;
 import org.chromium.base.Log;
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.Feature;

 import java.util.concurrent.atomic.AtomicReference;

 import javax.annotation.concurrent.GuardedBy;

 /**
  * Tests for certain edge cases related to integrating with the Android view system.
  */
 @RunWith(AwJUnit4ClassRunner.class)
 public class AndroidViewIntegrationTest {
     @Rule
     public AwActivityTestRule mActivityTestRule =
             new AwActivityTestRule() {
                 @Override
                 public TestDependencyFactory createTestDependencyFactory() {
                     return new TestDependencyFactory() {
                         @Override
                         public AwLayoutSizer createLayoutSizer() {
                             return new TestAwLayoutSizer();
                         }
                     };
                 }
             };

     private static final String TAG = "AndroidViewTest"; // 20 max characters
     // TODO(crbug.com/949391): turn this off once we can get some details about flakes.
     private static final boolean DEBUG = true;
     private static final int CONTENT_SIZE_CHANGE_STABILITY_TIMEOUT_MS = 1000;

     private static class OnContentSizeChangedHelper extends CallbackHelper {
         final private Object mLock = new Object();
         @GuardedBy("mLock")
         private int mWidth;
         @GuardedBy("mLock")
         private int mHeight;

         public int getWidth() {
             assert getCallCount() > 0;
             synchronized (mLock) {
                 return mWidth;
             }
         }

         public int getHeight() {
             assert getCallCount() > 0;
             synchronized (mLock) {
                 return mHeight;
             }
         }

         public void onContentSizeChanged(int widthCss, int heightCss) {
             synchronized (mLock) {
                 mWidth = widthCss;
                 mHeight = heightCss;
             }
             notifyCalled();
         }
     }

     private OnContentSizeChangedHelper mOnContentSizeChangedHelper =
             new OnContentSizeChangedHelper();
     private CallbackHelper mOnPageScaleChangedHelper = new CallbackHelper();

     private class TestAwLayoutSizer extends AwLayoutSizer {
         @Override
         public void onContentSizeChanged(int widthCss, int heightCss) {
             super.onContentSizeChanged(widthCss, heightCss);
             if (mOnContentSizeChangedHelper != null) {
                 mOnContentSizeChangedHelper.onContentSizeChanged(widthCss, heightCss);
             }
         }

         @Override
         public void onPageScaleChanged(float pageScaleFactor) {
             super.onPageScaleChanged(pageScaleFactor);
             if (mOnPageScaleChangedHelper != null) {
                 mOnPageScaleChangedHelper.notifyCalled();
             }
         }
     }

     final LinearLayout.LayoutParams mWrapContentLayoutParams =
             new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

     private AwTestContainerView createCustomTestContainerViewOnMainSync(
             final AwContentsClient awContentsClient, final int visibility) throws Exception {
         final AtomicReference<AwTestContainerView> testContainerView =
                 new AtomicReference<>();
         InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> {
             testContainerView.set(
                     mActivityTestRule.createAwTestContainerView(awContentsClient));
             testContainerView.get().setLayoutParams(mWrapContentLayoutParams);
             testContainerView.get().setVisibility(visibility);
         });
         return testContainerView.get();
     }

     private AwTestContainerView createDetachedTestContainerViewOnMainSync(
             final AwContentsClient awContentsClient) {
         final AtomicReference<AwTestContainerView> testContainerView =
                 new AtomicReference<>();
         InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> testContainerView.set(
                 mActivityTestRule.createDetachedAwTestContainerView(awContentsClient)));
         return testContainerView.get();
     }

     private void assertZeroHeight(final AwTestContainerView testContainerView) throws Throwable {
         // Make sure the test isn't broken by the view having a non-zero height.
         InstrumentationRegistry.getInstrumentation().runOnMainSync(
                 () -> Assert.assertEquals(0, testContainerView.getHeight()));
     }

     private int getRootLayoutWidthOnMainThread() throws Exception {
         final AtomicReference<Integer> width = new AtomicReference<>();
         InstrumentationRegistry.getInstrumentation().runOnMainSync(
                 () -> width.set(
                         Integer.valueOf(mActivityTestRule.getActivity().getRootLayoutWidth())));
         return width.get();
     }

     /**
      * This checks for issues related to loading content into a 0x0 view.
      *
      * A 0x0 sized view is common if the WebView is set to wrap_content and newly created. The
      * expected behavior is for the WebView to expand after some content is loaded.
      * In Chromium it would be valid to not load or render content into a WebContents with a 0x0
      * view (since the user can't see it anyway) and only do so after the view's size is non-zero.
      * Such behavior is unacceptable for the WebView and this test is to ensure that such behavior
      * is not re-introduced.
      */
     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testZeroByZeroViewLoadsContent() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
                 contentsClient, View.VISIBLE);
         assertZeroHeight(testContainerView);

         final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         mActivityTestRule.loadDataAsync(
                 testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
         mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
         Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
     }

     /**
      * Check that a content size change notification is issued when the view is invisible.
      *
      * This makes sure that any optimizations related to the view's visibility don't inhibit
      * the ability to load pages. Many applications keep the WebView hidden when it's loading.
      */
     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testInvisibleViewLoadsContent() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
                 contentsClient, View.INVISIBLE);
         assertZeroHeight(testContainerView);

         final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         mActivityTestRule.loadDataAsync(
                 testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
         mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
         Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);

         InstrumentationRegistry.getInstrumentation().runOnMainSync(
                 () -> Assert.assertEquals(View.INVISIBLE, testContainerView.getVisibility()));
     }

     /**
      * Check that a content size change notification is sent even if the WebView is off screen.
      */
     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testDisconnectedViewLoadsContent() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView =
                 createDetachedTestContainerViewOnMainSync(contentsClient);
         assertZeroHeight(testContainerView);

         final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         final int pageScaleChangeCallCount = mOnPageScaleChangedHelper.getCallCount();
         mActivityTestRule.loadDataAsync(
                 testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
         mOnPageScaleChangedHelper.waitForCallback(pageScaleChangeCallCount);
         mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
         Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
     }

     private String makeHtmlPageOfSize(int widthCss, int heightCss, boolean heightPercent) {
         String content = "<div class=\"normal\">a</div>";
         if (heightPercent) content += "<div class=\"heightPercent\"></div>";
         return CommonResources.makeHtmlPageFrom("<style type=\"text/css\">"
                         + "  body { margin:0px; padding:0px; } "
                         + "  .normal { "
                         + "    width:" + widthCss + "px; "
                         + "    height:" + heightCss + "px; "
                         + "    background-color: #227788; "
                         + "  } "
                         + "  .heightPercent { "
                         + "    height: 150%; "
                         + "    background-color: blue; "
                         + "  } "
                         + "</style>",
                 content);
     }

     private void waitForContentSizeToChangeTo(OnContentSizeChangedHelper helper, int callCount,
             int widthCss, int heightCss) throws Exception {
         final int maxSizeChangeNotificationsToWaitFor = 5;
         for (int i = 0; i < maxSizeChangeNotificationsToWaitFor; i++) {
             helper.waitForCallback(callCount + i);
             if (DEBUG) {
                 Log.i(TAG,
                         "i: " + i + ", height: " + helper.getHeight()
                                 + ", width: " + helper.getWidth());
             }
             if ((heightCss == -1 || helper.getHeight() == heightCss)
                     && (widthCss == -1 || helper.getWidth() == widthCss)) {
                 return;
             }
         }
         Assert.fail("The expected contents size was not reached in max # of trials.");
     }

     private void loadPageOfSizeAndWaitForSizeChange(AwContents awContents,
             OnContentSizeChangedHelper helper, int widthCss, int heightCss,
             boolean heightPercent) throws Exception {
         // loadDataAsync loads HTML as a data URI, which requires encoding '#' characters as '%23'.
         final String htmlData =
                 makeHtmlPageOfSize(widthCss, heightCss, heightPercent).replace("#", "%23");
         final int contentSizeChangeCallCount = helper.getCallCount();
         mActivityTestRule.loadDataAsync(awContents, htmlData, "text/html", false);

         waitForContentSizeToChangeTo(helper, contentSizeChangeCallCount, widthCss, heightCss);
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testSizeUpdateWhenDetached() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
                 contentsClient);
         assertZeroHeight(testContainerView);

         final int contentWidthCss = 142;
         final int contentHeightCss = 180;

         loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
                 mOnContentSizeChangedHelper, contentWidthCss, contentHeightCss, false);
     }

     public void waitForNoLayoutsPending() throws InterruptedException {
         // This is to make sure that there are no more pending size change notifications. Ideally
         // we'd assert that the renderer is idle (has no pending layout passes) but that would
         // require quite a bit of plumbing, so we just wait a bit and make sure the size hadn't
         // changed.
         Thread.sleep(CONTENT_SIZE_CHANGE_STABILITY_TIMEOUT_MS);
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testAbsolutePositionContributesToContentSize() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
                 contentsClient);
         assertZeroHeight(testContainerView);

         final int widthCss = 142;
         final int heightCss = 180;

         final String htmlData = CommonResources.makeHtmlPageFrom("<style type=\"text/css\">"
                 + "  body { margin:0px; padding:0px; } "
                 + "  div { "
                 + "    position: absolute; "
                 + "    width:" + widthCss + "px; "
                 + "    height:" + heightCss + "px; "
                 + "    background-color: red; "
                 + "  } "
                 + "</style>", "<div>a</div>");

         final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         Assert.assertEquals(0, contentSizeChangeCallCount);
         mActivityTestRule.loadDataAsync(
                 testContainerView.getAwContents(), htmlData, "text/html", false);

         waitForContentSizeToChangeTo(mOnContentSizeChangedHelper, contentSizeChangeCallCount,
                 widthCss, heightCss);
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testViewIsNotBlankInWrapContentsMode() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView =
                 createCustomTestContainerViewOnMainSync(contentsClient, View.VISIBLE);
         assertZeroHeight(testContainerView);

         final double deviceDIPScale =
                 GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
         final int contentHeightCss = 180;

         // In wrap-content mode the AwLayoutSizer will size the view to be as wide as the parent
         // view.
         final int expectedWidthCss =
                 (int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
         final int expectedHeightCss = contentHeightCss;

         loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
                 mOnContentSizeChangedHelper, expectedWidthCss, expectedHeightCss, false);

         GraphicsTestUtils.pollForBackgroundColor(
                 testContainerView.getAwContents(), 0xFF227788);
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testViewSizedCorrectlyInWrapContentMode() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
                 contentsClient, View.VISIBLE);
         assertZeroHeight(testContainerView);

         final double deviceDIPScale =
                 GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
         final int contentHeightCss = 180;

         // In wrap-content mode the AwLayoutSizer will size the view to be as wide as the parent
         // view.
         final int expectedWidthCss =
                 (int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
         final int expectedHeightCss = contentHeightCss;

         loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
                 mOnContentSizeChangedHelper, expectedWidthCss, expectedHeightCss, false);

         waitForNoLayoutsPending();
         Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
         Assert.assertEquals(expectedHeightCss, mOnContentSizeChangedHelper.getHeight());
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testViewSizedCorrectlyInWrapContentModeWithDynamicContents() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
                 contentsClient, View.VISIBLE);
         assertZeroHeight(testContainerView);

         final double deviceDIPScale =
                 GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
         final int contentHeightCss = 180;

         final int expectedWidthCss =
                 (int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
         final int expectedHeightCss = contentHeightCss;

         loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
                 mOnContentSizeChangedHelper, expectedWidthCss, contentHeightCss, true);

         waitForNoLayoutsPending();
         Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
         Assert.assertEquals(expectedHeightCss, mOnContentSizeChangedHelper.getHeight());
     }

     @Test
     @SmallTest
     @Feature({"AndroidWebView"})
     public void testReceivingSizeAfterLoadUpdatesLayout() throws Throwable {
         final TestAwContentsClient contentsClient = new TestAwContentsClient();
         final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
                 contentsClient);
         final AwContents awContents = testContainerView.getAwContents();

         final double deviceDIPScale =
                 GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
         final int physicalWidth = 600;
         final int spanWidth = 42;
         final int expectedWidthCss =
                 (int) Math.ceil(physicalWidth / deviceDIPScale);

         StringBuilder htmlBuilder = new StringBuilder("<html><body style='margin:0px;'>");
         final String spanBlock =
                 "<span style='width: " + spanWidth + "px; display: inline-block;'>a</span>";
         for (int i = 0; i < 10; ++i) {
             htmlBuilder.append(spanBlock);
         }
         htmlBuilder.append("</body></html>");

         int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         mActivityTestRule.loadDataAsync(awContents, htmlBuilder.toString(), "text/html", false);
         // Because we're loading the contents into a detached WebView its layout size is 0x0 and as
         // a result of that the paragraph will be formated such that each word is on a separate
         // line.
         waitForContentSizeToChangeTo(mOnContentSizeChangedHelper, contentSizeChangeCallCount,
                 spanWidth, -1);

         final int narrowLayoutHeight = mOnContentSizeChangedHelper.getHeight();

         contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
         InstrumentationRegistry.getInstrumentation().runOnMainSync(
                 () -> testContainerView.onSizeChanged(physicalWidth, 0, 0, 0));
         mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);

         // As a result of calling the onSizeChanged method the layout size should be updated to
         // match the width of the webview and the text we previously loaded should reflow making the
         // contents width match the WebView width.
         Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
         Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() < narrowLayoutHeight);
         Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
     }
 }
	// Copyright 2013 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.android_webview.test;

	import android.support.test.InstrumentationRegistry;
	import android.support.test.filters.SmallTest;
	import android.view.View;
	import android.view.ViewGroup.LayoutParams;
	import android.widget.LinearLayout;

	import org.junit.Assert;
	import org.junit.Rule;
	import org.junit.Test;
	import org.junit.runner.RunWith;

	import org.chromium.android_webview.AwContents;
	import org.chromium.android_webview.AwContentsClient;
	import org.chromium.android_webview.AwLayoutSizer;
	import org.chromium.android_webview.test.util.CommonResources;
	import org.chromium.android_webview.test.util.GraphicsTestUtils;
	import org.chromium.base.Log;
	import org.chromium.base.test.util.CallbackHelper;
	import org.chromium.base.test.util.Feature;

	import java.util.concurrent.atomic.AtomicReference;

	import javax.annotation.concurrent.GuardedBy;

	/**
	* Tests for certain edge cases related to integrating with the Android view system.
	*/
	@RunWith(AwJUnit4ClassRunner.class)
	public class AndroidViewIntegrationTest {
	@Rule
	public AwActivityTestRule mActivityTestRule =
	new AwActivityTestRule() {
	@Override
	public TestDependencyFactory createTestDependencyFactory() {
	return new TestDependencyFactory() {
	@Override
	public AwLayoutSizer createLayoutSizer() {
	return new TestAwLayoutSizer();
	}
	};
	}
	};

	private static final String TAG = "AndroidViewTest"; // 20 max characters
	// TODO(crbug.com/949391): turn this off once we can get some details about flakes.
	private static final boolean DEBUG = true;
	private static final int CONTENT_SIZE_CHANGE_STABILITY_TIMEOUT_MS = 1000;

	private static class OnContentSizeChangedHelper extends CallbackHelper {
	final private Object mLock = new Object();
	@GuardedBy("mLock")
	private int mWidth;
	@GuardedBy("mLock")
	private int mHeight;

	public int getWidth() {
	assert getCallCount() > 0;
	synchronized (mLock) {
	return mWidth;
	}
	}

	public int getHeight() {
	assert getCallCount() > 0;
	synchronized (mLock) {
	return mHeight;
	}
	}

	public void onContentSizeChanged(int widthCss, int heightCss) {
	synchronized (mLock) {
	mWidth = widthCss;
	mHeight = heightCss;
	}
	notifyCalled();
	}
	}

	private OnContentSizeChangedHelper mOnContentSizeChangedHelper =
	new OnContentSizeChangedHelper();
	private CallbackHelper mOnPageScaleChangedHelper = new CallbackHelper();

	private class TestAwLayoutSizer extends AwLayoutSizer {
	@Override
	public void onContentSizeChanged(int widthCss, int heightCss) {
	super.onContentSizeChanged(widthCss, heightCss);
	if (mOnContentSizeChangedHelper != null) {
	mOnContentSizeChangedHelper.onContentSizeChanged(widthCss, heightCss);
	}
	}

	@Override
	public void onPageScaleChanged(float pageScaleFactor) {
	super.onPageScaleChanged(pageScaleFactor);
	if (mOnPageScaleChangedHelper != null) {
	mOnPageScaleChangedHelper.notifyCalled();
	}
	}
	}

	final LinearLayout.LayoutParams mWrapContentLayoutParams =
	new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);

	private AwTestContainerView createCustomTestContainerViewOnMainSync(
	final AwContentsClient awContentsClient, final int visibility) throws Exception {
	final AtomicReference<AwTestContainerView> testContainerView =
	new AtomicReference<>();
	InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> {
	testContainerView.set(
	mActivityTestRule.createAwTestContainerView(awContentsClient));
	testContainerView.get().setLayoutParams(mWrapContentLayoutParams);
	testContainerView.get().setVisibility(visibility);
	});
	return testContainerView.get();
	}

	private AwTestContainerView createDetachedTestContainerViewOnMainSync(
	final AwContentsClient awContentsClient) {
	final AtomicReference<AwTestContainerView> testContainerView =
	new AtomicReference<>();
	InstrumentationRegistry.getInstrumentation().runOnMainSync(() -> testContainerView.set(
	mActivityTestRule.createDetachedAwTestContainerView(awContentsClient)));
	return testContainerView.get();
	}

	private void assertZeroHeight(final AwTestContainerView testContainerView) throws Throwable {
	// Make sure the test isn't broken by the view having a non-zero height.
	InstrumentationRegistry.getInstrumentation().runOnMainSync(
	() -> Assert.assertEquals(0, testContainerView.getHeight()));
	}

	private int getRootLayoutWidthOnMainThread() throws Exception {
	final AtomicReference<Integer> width = new AtomicReference<>();
	InstrumentationRegistry.getInstrumentation().runOnMainSync(
	() -> width.set(
	Integer.valueOf(mActivityTestRule.getActivity().getRootLayoutWidth())));
	return width.get();
	}

	/**
	* This checks for issues related to loading content into a 0x0 view.
	*
	* A 0x0 sized view is common if the WebView is set to wrap_content and newly created. The
	* expected behavior is for the WebView to expand after some content is loaded.
	* In Chromium it would be valid to not load or render content into a WebContents with a 0x0
	* view (since the user can't see it anyway) and only do so after the view's size is non-zero.
	* Such behavior is unacceptable for the WebView and this test is to ensure that such behavior
	* is not re-introduced.
	*/
	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testZeroByZeroViewLoadsContent() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
	contentsClient, View.VISIBLE);
	assertZeroHeight(testContainerView);

	final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	mActivityTestRule.loadDataAsync(
	testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
	mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
	Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
	}

	/**
	* Check that a content size change notification is issued when the view is invisible.
	*
	* This makes sure that any optimizations related to the view's visibility don't inhibit
	* the ability to load pages. Many applications keep the WebView hidden when it's loading.
	*/
	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testInvisibleViewLoadsContent() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
	contentsClient, View.INVISIBLE);
	assertZeroHeight(testContainerView);

	final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	mActivityTestRule.loadDataAsync(
	testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
	mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
	Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);

	InstrumentationRegistry.getInstrumentation().runOnMainSync(
	() -> Assert.assertEquals(View.INVISIBLE, testContainerView.getVisibility()));
	}

	/**
	* Check that a content size change notification is sent even if the WebView is off screen.
	*/
	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testDisconnectedViewLoadsContent() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView =
	createDetachedTestContainerViewOnMainSync(contentsClient);
	assertZeroHeight(testContainerView);

	final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	final int pageScaleChangeCallCount = mOnPageScaleChangedHelper.getCallCount();
	mActivityTestRule.loadDataAsync(
	testContainerView.getAwContents(), CommonResources.ABOUT_HTML, "text/html", false);
	mOnPageScaleChangedHelper.waitForCallback(pageScaleChangeCallCount);
	mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);
	Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
	}

	private String makeHtmlPageOfSize(int widthCss, int heightCss, boolean heightPercent) {
	String content = "<div class=\"normal\">a</div>";
	if (heightPercent) content += "<div class=\"heightPercent\"></div>";
	return CommonResources.makeHtmlPageFrom("<style type=\"text/css\">"
	+ " body { margin:0px; padding:0px; } "
	+ " .normal { "
	+ " width:" + widthCss + "px; "
	+ " height:" + heightCss + "px; "
	+ " background-color: #227788; "
	+ " } "
	+ " .heightPercent { "
	+ " height: 150%; "
	+ " background-color: blue; "
	+ " } "
	+ "</style>",
	content);
	}

	private void waitForContentSizeToChangeTo(OnContentSizeChangedHelper helper, int callCount,
	int widthCss, int heightCss) throws Exception {
	final int maxSizeChangeNotificationsToWaitFor = 5;
	for (int i = 0; i < maxSizeChangeNotificationsToWaitFor; i++) {
	helper.waitForCallback(callCount + i);
	if (DEBUG) {
	Log.i(TAG,
	"i: " + i + ", height: " + helper.getHeight()
	+ ", width: " + helper.getWidth());
	}
	if ((heightCss == -1 \|\| helper.getHeight() == heightCss)
	&& (widthCss == -1 \|\| helper.getWidth() == widthCss)) {
	return;
	}
	}
	Assert.fail("The expected contents size was not reached in max # of trials.");
	}

	private void loadPageOfSizeAndWaitForSizeChange(AwContents awContents,
	OnContentSizeChangedHelper helper, int widthCss, int heightCss,
	boolean heightPercent) throws Exception {
	// loadDataAsync loads HTML as a data URI, which requires encoding '#' characters as '%23'.
	final String htmlData =
	makeHtmlPageOfSize(widthCss, heightCss, heightPercent).replace("#", "%23");
	final int contentSizeChangeCallCount = helper.getCallCount();
	mActivityTestRule.loadDataAsync(awContents, htmlData, "text/html", false);

	waitForContentSizeToChangeTo(helper, contentSizeChangeCallCount, widthCss, heightCss);
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testSizeUpdateWhenDetached() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
	contentsClient);
	assertZeroHeight(testContainerView);

	final int contentWidthCss = 142;
	final int contentHeightCss = 180;

	loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
	mOnContentSizeChangedHelper, contentWidthCss, contentHeightCss, false);
	}

	public void waitForNoLayoutsPending() throws InterruptedException {
	// This is to make sure that there are no more pending size change notifications. Ideally
	// we'd assert that the renderer is idle (has no pending layout passes) but that would
	// require quite a bit of plumbing, so we just wait a bit and make sure the size hadn't
	// changed.
	Thread.sleep(CONTENT_SIZE_CHANGE_STABILITY_TIMEOUT_MS);
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testAbsolutePositionContributesToContentSize() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
	contentsClient);
	assertZeroHeight(testContainerView);

	final int widthCss = 142;
	final int heightCss = 180;

	final String htmlData = CommonResources.makeHtmlPageFrom("<style type=\"text/css\">"
	+ " body { margin:0px; padding:0px; } "
	+ " div { "
	+ " position: absolute; "
	+ " width:" + widthCss + "px; "
	+ " height:" + heightCss + "px; "
	+ " background-color: red; "
	+ " } "
	+ "</style>", "<div>a</div>");

	final int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	Assert.assertEquals(0, contentSizeChangeCallCount);
	mActivityTestRule.loadDataAsync(
	testContainerView.getAwContents(), htmlData, "text/html", false);

	waitForContentSizeToChangeTo(mOnContentSizeChangedHelper, contentSizeChangeCallCount,
	widthCss, heightCss);
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testViewIsNotBlankInWrapContentsMode() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView =
	createCustomTestContainerViewOnMainSync(contentsClient, View.VISIBLE);
	assertZeroHeight(testContainerView);

	final double deviceDIPScale =
	GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
	final int contentHeightCss = 180;

	// In wrap-content mode the AwLayoutSizer will size the view to be as wide as the parent
	// view.
	final int expectedWidthCss =
	(int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
	final int expectedHeightCss = contentHeightCss;

	loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
	mOnContentSizeChangedHelper, expectedWidthCss, expectedHeightCss, false);

	GraphicsTestUtils.pollForBackgroundColor(
	testContainerView.getAwContents(), 0xFF227788);
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testViewSizedCorrectlyInWrapContentMode() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
	contentsClient, View.VISIBLE);
	assertZeroHeight(testContainerView);

	final double deviceDIPScale =
	GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
	final int contentHeightCss = 180;

	// In wrap-content mode the AwLayoutSizer will size the view to be as wide as the parent
	// view.
	final int expectedWidthCss =
	(int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
	final int expectedHeightCss = contentHeightCss;

	loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
	mOnContentSizeChangedHelper, expectedWidthCss, expectedHeightCss, false);

	waitForNoLayoutsPending();
	Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
	Assert.assertEquals(expectedHeightCss, mOnContentSizeChangedHelper.getHeight());
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testViewSizedCorrectlyInWrapContentModeWithDynamicContents() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createCustomTestContainerViewOnMainSync(
	contentsClient, View.VISIBLE);
	assertZeroHeight(testContainerView);

	final double deviceDIPScale =
	GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
	final int contentHeightCss = 180;

	final int expectedWidthCss =
	(int) Math.ceil(getRootLayoutWidthOnMainThread() / deviceDIPScale);
	final int expectedHeightCss = contentHeightCss;

	loadPageOfSizeAndWaitForSizeChange(testContainerView.getAwContents(),
	mOnContentSizeChangedHelper, expectedWidthCss, contentHeightCss, true);

	waitForNoLayoutsPending();
	Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
	Assert.assertEquals(expectedHeightCss, mOnContentSizeChangedHelper.getHeight());
	}

	@Test
	@SmallTest
	@Feature({"AndroidWebView"})
	public void testReceivingSizeAfterLoadUpdatesLayout() throws Throwable {
	final TestAwContentsClient contentsClient = new TestAwContentsClient();
	final AwTestContainerView testContainerView = createDetachedTestContainerViewOnMainSync(
	contentsClient);
	final AwContents awContents = testContainerView.getAwContents();

	final double deviceDIPScale =
	GraphicsTestUtils.dipScaleForContext(testContainerView.getContext());
	final int physicalWidth = 600;
	final int spanWidth = 42;
	final int expectedWidthCss =
	(int) Math.ceil(physicalWidth / deviceDIPScale);

	StringBuilder htmlBuilder = new StringBuilder("<html><body style='margin:0px;'>");
	final String spanBlock =
	"<span style='width: " + spanWidth + "px; display: inline-block;'>a</span>";
	for (int i = 0; i < 10; ++i) {
	htmlBuilder.append(spanBlock);
	}
	htmlBuilder.append("</body></html>");

	int contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	mActivityTestRule.loadDataAsync(awContents, htmlBuilder.toString(), "text/html", false);
	// Because we're loading the contents into a detached WebView its layout size is 0x0 and as
	// a result of that the paragraph will be formated such that each word is on a separate
	// line.
	waitForContentSizeToChangeTo(mOnContentSizeChangedHelper, contentSizeChangeCallCount,
	spanWidth, -1);

	final int narrowLayoutHeight = mOnContentSizeChangedHelper.getHeight();

	contentSizeChangeCallCount = mOnContentSizeChangedHelper.getCallCount();
	InstrumentationRegistry.getInstrumentation().runOnMainSync(
	() -> testContainerView.onSizeChanged(physicalWidth, 0, 0, 0));
	mOnContentSizeChangedHelper.waitForCallback(contentSizeChangeCallCount);

	// As a result of calling the onSizeChanged method the layout size should be updated to
	// match the width of the webview and the text we previously loaded should reflow making the
	// contents width match the WebView width.
	Assert.assertEquals(expectedWidthCss, mOnContentSizeChangedHelper.getWidth());
	Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() < narrowLayoutHeight);
	Assert.assertTrue(mOnContentSizeChangedHelper.getHeight() > 0);
	}
	}