1/* 2 * Copyright (C) 2015 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 17package com.android.setupwizardlib.test; 18 19import static org.junit.Assert.assertEquals; 20import static org.junit.Assert.assertFalse; 21import static org.junit.Assert.assertTrue; 22 23import android.content.Context; 24import android.support.test.InstrumentationRegistry; 25import android.support.test.filters.SmallTest; 26import android.support.test.runner.AndroidJUnit4; 27import android.view.View; 28 29import com.android.setupwizardlib.view.BottomScrollView; 30 31import org.junit.Before; 32import org.junit.Test; 33import org.junit.runner.RunWith; 34 35@RunWith(AndroidJUnit4.class) 36@SmallTest 37public class BottomScrollViewTest { 38 39 private TestBottomScrollListener mListener; 40 41 @Before 42 public void setUp() throws Exception { 43 mListener = new TestBottomScrollListener(); 44 } 45 46 @Test 47 public void testNoNeedScroll() { 48 createScrollView(20); 49 assertTrue("Scroll should not be required", mListener.mScrolledToBottom); 50 } 51 52 @Test 53 public void testNeedScroll() { 54 createScrollView(110); 55 assertFalse("Scroll should be required", mListener.mScrolledToBottom); 56 } 57 58 @Test 59 public void testScrollToBottom() { 60 final BottomScrollView bottomScrollView = createScrollView(110); 61 62 assertFalse("Scroll should be required", mListener.mScrolledToBottom); 63 64 bottomScrollView.scrollTo(0, 10); 65 assertTrue("Should already be scrolled to bottom", mListener.mScrolledToBottom); 66 } 67 68 @Test 69 public void testScrollThreshold() { 70 final BottomScrollView bottomScrollView = createScrollView(110); 71 assertEquals("Scroll threshold should be 10", 10, bottomScrollView.getScrollThreshold()); 72 } 73 74 private BottomScrollView createScrollView(final int childHeight) { 75 final Context context = InstrumentationRegistry.getContext(); 76 final BottomScrollView bottomScrollView = new TestBottomScrollView(context); 77 bottomScrollView.setBottomScrollListener(mListener); 78 79 final View child = new TestChildView(context, childHeight); 80 81 child.measure(0, 0); // TestChildView's measured dimensions doesn't depend on the arguments 82 bottomScrollView.addView(child); 83 bottomScrollView.layout(0, 0, 100, 100); 84 85 return bottomScrollView; 86 } 87 88 private static class TestChildView extends View { 89 90 private static final int WIDTH = 10; 91 private int mHeight; 92 93 TestChildView(Context context, int height) { 94 super(context); 95 mHeight = height; 96 } 97 98 @Override 99 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 100 setMeasuredDimension(WIDTH, mHeight); 101 } 102 103 public void setHeight(int height) { 104 mHeight = height; 105 } 106 } 107 108 private static class TestBottomScrollView extends BottomScrollView { 109 110 TestBottomScrollView(Context context) { 111 super(context); 112 } 113 114 @Override 115 public boolean post(Runnable action) { 116 // Post all runnables synchronously so that tests can check the callbacks. 117 action.run(); 118 return true; 119 } 120 } 121 122 private static class TestBottomScrollListener implements BottomScrollView.BottomScrollListener { 123 124 boolean mScrolledToBottom = true; 125 126 @Override 127 public void onScrolledToBottom() { 128 mScrolledToBottom = true; 129 } 130 131 @Override 132 public void onRequiresScroll() { 133 mScrolledToBottom = false; 134 } 135 } 136} 137