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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.managedprovisioning.common;
     17 
     18 import static android.support.test.InstrumentationRegistry.getTargetContext;
     19 
     20 import static org.hamcrest.Matchers.equalTo;
     21 import static org.hamcrest.Matchers.lessThanOrEqualTo;
     22 import static org.hamcrest.number.OrderingComparison.greaterThanOrEqualTo;
     23 import static org.junit.Assert.assertThat;
     24 import static org.mockito.Matchers.any;
     25 import static org.mockito.Mockito.verify;
     26 import static org.mockito.Mockito.verifyNoMoreInteractions;
     27 import static org.mockito.Mockito.verifyZeroInteractions;
     28 
     29 import android.graphics.Rect;
     30 import android.support.test.filters.SmallTest;
     31 import android.view.TouchDelegate;
     32 import android.view.View;
     33 
     34 import org.junit.Before;
     35 import org.junit.Test;
     36 import org.mockito.ArgumentCaptor;
     37 import org.mockito.Captor;
     38 import org.mockito.Mock;
     39 import org.mockito.MockitoAnnotations;
     40 
     41 @SmallTest
     42 public class TouchTargetEnforcerTest {
     43     private static final float SAMPLE_DENSITY = 2.625f;
     44     private static final int TOLERANCE_PX = 2;
     45     private static final int OFFSET_DEFAULT = 500;
     46 
     47     @Mock private View mViewAncestor;
     48     @Captor private ArgumentCaptor<Runnable> mArgumentCaptor;
     49     private TouchTargetEnforcer mEnforcer;
     50     private View mView;
     51     private int mEdgeValue;
     52 
     53     private Rect mCapturedBounds;
     54     private View mCapturedTargetView;
     55 
     56     @Before
     57     public void setUp() {
     58         MockitoAnnotations.initMocks(this);
     59         mView = new View(getTargetContext());
     60         mEdgeValue = Math.round(TouchTargetEnforcer.MIN_TARGET_DP * SAMPLE_DENSITY);
     61 
     62         mEnforcer = new TouchTargetEnforcer(SAMPLE_DENSITY, (bounds, target) -> {
     63             mCapturedBounds = bounds;
     64             mCapturedTargetView = target;
     65             return new TouchDelegate(mCapturedBounds, mCapturedTargetView);
     66         });
     67 
     68         mCapturedBounds = null;
     69         mCapturedTargetView = null;
     70     }
     71 
     72     @Test
     73     public void expansionNeededWidth() {
     74         testExpansionNeeded(mEdgeValue - 1, mEdgeValue + 1);
     75     }
     76 
     77     @Test
     78     public void expansionNeededHeight() {
     79         testExpansionNeeded(mEdgeValue + 1, mEdgeValue - 1);
     80     }
     81 
     82     @Test
     83     public void expansionNeededWidthHeight() {
     84         testExpansionNeeded(mEdgeValue - 1, mEdgeValue - 1);
     85     }
     86 
     87     private void testExpansionNeeded(int width, int height) {
     88         setViewDimen(width, height);
     89         assertExpansionNeeded(width, height);
     90     }
     91 
     92     private void assertExpansionNeeded(int width, int height) {
     93         // when
     94         mEnforcer.enforce(mView, mViewAncestor);
     95         mView.getViewTreeObserver().dispatchOnGlobalLayout(); // force try register Touch Delegate
     96 
     97         // then
     98         verify(mViewAncestor).post(mArgumentCaptor.capture()); // prep capture TouchDelegate args
     99         mArgumentCaptor.getValue().run(); // capture args under mCapturedBounds
    100         //noinspection ResultOfMethodCallIgnored
    101         verify(mViewAncestor).getTouchDelegate();
    102         verify(mViewAncestor).setTouchDelegate(any());
    103         verifyNoMoreInteractions(mViewAncestor);
    104 
    105         // verify end state correct
    106         assertBoundsCorrect(width, mCapturedBounds.width());
    107         assertBoundsCorrect(height, mCapturedBounds.height());
    108     }
    109 
    110     @Test
    111     public void expansionNotNeeded() {
    112         // given
    113         setViewDimen(mEdgeValue + 1, mEdgeValue + 1);
    114         assertThat(mView.getWidth(), greaterThanOrEqualTo(mEdgeValue));
    115         assertThat(mView.getHeight(), greaterThanOrEqualTo(mEdgeValue));
    116 
    117         // when
    118         mEnforcer.enforce(mView, mViewAncestor);
    119         mView.getViewTreeObserver().dispatchOnGlobalLayout(); // force UI queue to add a Runnable
    120 
    121         // then
    122         verifyZeroInteractions(mViewAncestor);
    123     }
    124 
    125     @Test
    126     public void doesNotCrashOnEdges() {
    127         setViewDimen(0, 0, 0);
    128         assertExpansionNeeded(0, 0);
    129     }
    130 
    131     private void assertBoundsCorrect(int oldValue, int newValue) {
    132         assertThat(newValue, greaterThanOrEqualTo(mEdgeValue));
    133         if (oldValue >= mEdgeValue) {
    134             assertThat(newValue, equalTo(oldValue));
    135         } else {
    136             assertThat(mCapturedBounds.width(), lessThanOrEqualTo(mEdgeValue + TOLERANCE_PX));
    137         }
    138     }
    139 
    140     private void setViewDimen(int width, int height) {
    141         setViewDimen(width, height, OFFSET_DEFAULT);
    142     }
    143 
    144     private void setViewDimen(int width, int height, int offset) {
    145         mView.setLeft(offset);
    146         mView.setRight(offset + width);
    147         mView.setTop(offset);
    148         mView.setBottom(offset + height);
    149     }
    150 }