// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
package org.chromium.components.browser_ui.accessibility;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.ArgumentMatchers.eq;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import androidx.test.filters.SmallTest;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.ArgumentMatchers;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
import org.chromium.base.FeatureList;
import org.chromium.base.test.BaseRobolectricTestRunner;
import org.chromium.base.test.util.JniMocker;
import org.chromium.content.browser.HostZoomMapImpl;
import org.chromium.content.browser.HostZoomMapImplJni;
import org.chromium.content_public.browser.ContentFeatureList;
import org.chromium.content_public.browser.HostZoomMap;
import org.chromium.content_public.browser.WebContents;
import org.chromium.ui.modelutil.PropertyModel;
/** Unit tests for {@link PageZoomMediator}. */
@SmallTest
@RunWith(BaseRobolectricTestRunner.class)
public class PageZoomMediatorUnitTest {
// Error messages
private static final String CURRENT_ZOOM_FAILURE =
"Failure in fetching the current zoom factor for the model or web contents.";
private static final String DECREASE_ZOOM_FAILURE_NO_JNI =
"Failure in decrease zoom method. Expected 1 JNI call but none occurred.";
private static final String INCREASE_ZOOM_FAILURE_NO_JNI =
"Failure in increase zoom method. Expected 1 JNI call but none occurred.";
private static final String RESET_ZOOM_FAILURE_NO_JNI =
"Failure in reset zoom method. Expected 1 JNI call but none occurred.";
private static final String DECREASE_ZOOM_FAILURE_WITH_JNI =
"Failure in decrease zoom method. Expected no JNI calls but at least 1 occurred.";
private static final String INCREASE_ZOOM_FAILURE_WITH_JNI =
"Failure in increase zoom method. Expected no JNI calls but at least 1 occurred.";
private static final String DECREASE_ENABLED_FAILURE =
"Failure to enable decrease button when seekbar value increased from minimum.";
private static final String INCREASE_ENABLED_FAILURE =
"Failure to enable increase button when seekbar value decreased from maximum.";
private static final String DECREASE_DISABLED_FAILURE =
"Failure to disable decrease button when seekbar value reached minimum.";
private static final String INCREASE_DISABLED_FAILURE =
"Failure to disable increase button when seekbar value reached maximum.";
private static final String SEEKBAR_VALUE_FAILURE =
"Failure to update zoom factor or seekbar level when value seekbar value changed.";
private static final String SEEKBAR_VALUE_FAILURE_NO_JNI =
"Failure in seekbar value method. Expected 1 JNI call but none occurred.";
private static final String RESET_ZOOM_FAILURE = "Failure to reset to the default zoom level.";
@Rule public JniMocker mJniMocker = new JniMocker();
@Mock private WebContents mWebContentsMock;
@Mock private HostZoomMapImpl.Natives mHostZoomMapMock;
private PropertyModel mModel;
private PageZoomMediator mMediator;
@Before
public void setUp() {
MockitoAnnotations.initMocks(this);
FeatureList.TestValues testValues = new FeatureList.TestValues();
testValues.addFeatureFlagOverride(ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM, true);
testValues.addFieldTrialParamOverride(
ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM,
ContentFeatureList.ACCESSIBILITY_PAGE_ZOOM_PARAM,
"true");
FeatureList.setTestValues(testValues);
mJniMocker.mock(HostZoomMapImplJni.TEST_HOOKS, mHostZoomMapMock);
mModel = new PropertyModel.Builder(PageZoomProperties.ALL_KEYS).build();
mModel.set(PageZoomProperties.DEFAULT_ZOOM_FACTOR, 0.0);
mMediator = new PageZoomMediator(mModel);
HostZoomMap.setSystemFontScale(1.0f);
}
@Test
public void testDecreaseZoom() {
// Verify that calling decrease zoom method sends expected value to native code.
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(2.22);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 100, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleDecreaseClicked(null);
verify(mHostZoomMapMock, times(1).description(DECREASE_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 1.56, 1.56);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 83, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testDecreaseZoom_SmallConfiguration() {
// Verify that calling decrease zoom method sends expected value to native code.
HostZoomMap.setSystemFontScale(0.85f);
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(2.22);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 126, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleDecreaseClicked(null);
verify(mHostZoomMapMock, times(1).description(DECREASE_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 3.07, 2.18);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 125, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testIncreaseZoom() {
// Verify that calling increase zoom method sends expected value to native code.
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(2.22);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 100, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleIncreaseClicked(null);
verify(mHostZoomMapMock, times(1).description(INCREASE_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 3.07, 3.07);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 125, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testIncreaseZoom_LargeConfiguration() {
// Verify that calling increase zoom method sends expected value to native code.
HostZoomMap.setSystemFontScale(1.3f);
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(2.22);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 65, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleIncreaseClicked(null);
verify(mHostZoomMapMock, times(1).description(INCREASE_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 1.22, 2.66);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 75, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testIncreaseZoom_LargeConfiguration_RenderOverMaxDisplayValue() {
// Verify that calling increase zoom method sends expected value to native code when the OS
// font scale in use could cause the rendered zoom factor value to overflow beyond the
// maximum displayed zoom factor value.
HostZoomMap.setSystemFontScale(2.2f);
// Assume that the currently rendered zoom value is maximum, that is 300% or a zoom factor
// of 6.03. For the zoom scales defined above, this will be equivalent to a display value of
// 300/2.2 ~ 137%.
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(6.03);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 87, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
// A single increase at this point should display the next closest zoom level of 150% (zoom
// factor ~ 2.22) with respect to 137%, that is equivalent to a rendered value of 150*2.2
// ~ 330% (zoom factor ~ 6.54).
mMediator.handleIncreaseClicked(null);
verify(mHostZoomMapMock, times(1).description(INCREASE_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 2.22, 6.54);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 100, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testSeekBarValueChanged() {
// Verify the calling seekbar value change method sends expected value to native code.
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(2.22);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 100, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleSeekBarValueChanged(108);
verify(mHostZoomMapMock, times(1).description(SEEKBAR_VALUE_FAILURE_NO_JNI))
.setZoomLevel(
eq(mWebContentsMock),
ArgumentMatchers.doubleThat(argument -> Math.abs(2.51 - argument) <= 0.001),
ArgumentMatchers.doubleThat(
argument -> Math.abs(2.51 - argument) <= 0.001));
Assert.assertEquals(
SEEKBAR_VALUE_FAILURE, 108, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
@Test
public void testDecreaseZoomEnabledChange() {
// Verify that when already at the minimum zoom, the decrease button is disabled.
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(-3.8);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 0, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
Assert.assertFalse(
DECREASE_DISABLED_FAILURE, mModel.get(PageZoomProperties.DECREASE_ZOOM_ENABLED));
// Verify that when zoom level changes from minimum, the decrease button is reenabled.
mMediator.handleIncreaseClicked(null);
Assert.assertTrue(
DECREASE_ENABLED_FAILURE, mModel.get(PageZoomProperties.DECREASE_ZOOM_ENABLED));
}
@Test
public void testIncreaseZoomEnabledChange() {
// Verify that when already at the maximum zoom, the increase button is disabled
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(6.03);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 250, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
Assert.assertFalse(
INCREASE_DISABLED_FAILURE, mModel.get(PageZoomProperties.INCREASE_ZOOM_ENABLED));
// Verify that when zoom level changes from maximum, the increase button is reenabled.
mMediator.handleDecreaseClicked(null);
Assert.assertTrue(
INCREASE_ENABLED_FAILURE, mModel.get(PageZoomProperties.INCREASE_ZOOM_ENABLED));
}
@Test
public void testResetZoom() {
// The decimal value in the when() statements refer to the zoom factor, while the integer
// value in the assert() statements refers to the seek value listed in the table in
// PageZoomUtils.java
when(mHostZoomMapMock.getZoomLevel(any())).thenReturn(0.0);
mMediator.setWebContents(mWebContentsMock);
Assert.assertEquals(
CURRENT_ZOOM_FAILURE, 50, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
mMediator.handleResetClicked(null);
// Ensure that setZoomLevel method is called with the correct params (0.0, 0.0)
verify(mHostZoomMapMock, times(1).description(RESET_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 0.0, 0.0);
// Ensure that zoom stays the same if already at default
Assert.assertEquals(
RESET_ZOOM_FAILURE, 50, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
// Increase the zoom and ensure that zoom returns to default
mMediator.handleIncreaseClicked(null);
mMediator.handleResetClicked(null);
// Check that number of times setZoomLevel(0,0) is called has increased by 1
verify(mHostZoomMapMock, times(2).description(RESET_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 0.0, 0.0);
Assert.assertEquals(
RESET_ZOOM_FAILURE, 50, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
// Decrease the zoom and ensure that zoom returns to default
mMediator.handleDecreaseClicked(null);
mMediator.handleResetClicked(null);
verify(mHostZoomMapMock, times(3).description(RESET_ZOOM_FAILURE_NO_JNI))
.setZoomLevel(mWebContentsMock, 0.0, 0.0);
Assert.assertEquals(
RESET_ZOOM_FAILURE, 50, mModel.get(PageZoomProperties.CURRENT_SEEK_VALUE));
}
}
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