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      1 // Copyright 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 package org.chromium.content.browser;
      6 
      7 import android.content.Context;
      8 import android.util.DisplayMetrics;
      9 import android.view.WindowManager;
     10 
     11 import org.chromium.base.test.util.DisabledTest;
     12 import org.chromium.content.browser.test.util.JavaScriptUtils;
     13 
     14 /**
     15  * Test suite for viewport-related properties.
     16  */
     17 public class ViewportTest extends ContentViewTestBase {
     18 
     19     protected String evaluateStringValue(String expression) throws Throwable {
     20         return JavaScriptUtils.executeJavaScriptAndWaitForResult(getContentViewCore(),
     21                 expression);
     22     }
     23 
     24     protected float evaluateFloatValue(String expression) throws Throwable {
     25         return Float.valueOf(evaluateStringValue(expression));
     26     }
     27 
     28     protected int evaluateIntegerValue(String expression) throws Throwable {
     29         return Integer.parseInt(evaluateStringValue(expression));
     30     }
     31 
     32     /*
     33     @MediumTest
     34     @Feature({"Viewport", "InitialViewportSize"})
     35     https://bugs.webkit.org/show_bug.cgi?id=107424
     36     */
     37     @DisabledTest
     38     public void testDefaultViewportSize() throws Throwable {
     39         launchContentShellWithUrl("about:blank");
     40         waitForActiveShellToBeDoneLoading();
     41 
     42         Context context = getInstrumentation().getTargetContext();
     43         WindowManager winManager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
     44         DisplayMetrics metrics = new DisplayMetrics();
     45         winManager.getDefaultDisplay().getMetrics(metrics);
     46 
     47         // window.devicePixelRatio should match the default display. Only check to 1 decimal place
     48         // to allow for rounding.
     49         assertEquals(metrics.density, evaluateFloatValue("window.devicePixelRatio"), 0.1);
     50 
     51         // Check that the viewport width is vaguely sensible.
     52         int viewportWidth = evaluateIntegerValue("document.documentElement.clientWidth");
     53         assertTrue(Math.abs(evaluateIntegerValue("window.innerWidth") - viewportWidth) <= 1);
     54         assertTrue(viewportWidth >= 979);
     55         assertTrue(viewportWidth <= Math.max(981, metrics.widthPixels / metrics.density + 1));
     56     }
     57 }
     58