1 /* 2 * Copyright (C) 2016 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 17 package com.android.documentsui.selection; 18 19 import static org.junit.Assert.assertTrue; 20 import static org.junit.Assert.fail; 21 22 import android.graphics.Point; 23 import android.support.test.filters.SmallTest; 24 import android.support.test.runner.AndroidJUnit4; 25 26 import com.android.documentsui.selection.ViewAutoScroller.ScrollHost; 27 import com.android.documentsui.selection.ViewAutoScroller.ScrollerCallbacks; 28 29 import org.junit.Before; 30 import org.junit.Test; 31 import org.junit.runner.RunWith; 32 33 import java.util.function.IntConsumer; 34 35 @RunWith(AndroidJUnit4.class) 36 @SmallTest 37 public final class ViewAutoScrollerTest { 38 39 private static final int VIEW_HEIGHT = 100; 40 private static final int TOP_Y_POINT = (int) (VIEW_HEIGHT 41 * ViewAutoScroller.TOP_BOTTOM_THRESHOLD_RATIO) - 1; 42 private static final int BOTTOM_Y_POINT = VIEW_HEIGHT 43 - (int) (VIEW_HEIGHT * ViewAutoScroller.TOP_BOTTOM_THRESHOLD_RATIO) 44 + 1; 45 private static final int EDGE_HEIGHT = 5; 46 47 private ViewAutoScroller mAutoScroller; 48 private Point mPoint; 49 private boolean mActive; 50 private ScrollHost mHost; 51 private ScrollerCallbacks mCallbacks; 52 private IntConsumer mScrollAssert; 53 54 @Before setUp()55 public void setUp() { 56 mActive = false; 57 mPoint = new Point(); 58 59 mHost = new ScrollHost() { 60 @Override 61 public boolean isActive() { 62 return mActive; 63 } 64 65 @Override 66 public int getViewHeight() { 67 return VIEW_HEIGHT; 68 } 69 70 @Override 71 public Point getCurrentPosition() { 72 return mPoint; 73 } 74 }; 75 76 mCallbacks = new ScrollerCallbacks() { 77 @Override 78 public void scrollBy(int dy) { 79 mScrollAssert.accept(dy); 80 } 81 82 @Override 83 public void runAtNextFrame(Runnable r) { 84 } 85 86 @Override 87 public void removeCallback(Runnable r) { 88 } 89 }; 90 91 mAutoScroller = new ViewAutoScroller(mHost, mCallbacks); 92 } 93 94 @Test testCursorNotInScrollZone()95 public void testCursorNotInScrollZone() { 96 mPoint = new Point(0, VIEW_HEIGHT/2); 97 mScrollAssert = (int dy) -> { 98 // Should not have called this method 99 fail("Received unexpected scroll event"); 100 assertTrue(false); 101 }; 102 mAutoScroller.run(); 103 } 104 105 @Test testCursorInScrollZone_notActive()106 public void testCursorInScrollZone_notActive() { 107 mActive = false; 108 mPoint = new Point(0, TOP_Y_POINT); 109 mScrollAssert = (int dy) -> { 110 // Should not have called this method 111 fail("Received unexpected scroll event"); 112 assertTrue(false); 113 }; 114 mAutoScroller.run(); 115 } 116 117 @Test testCursorInScrollZone_top()118 public void testCursorInScrollZone_top() { 119 mActive = true; 120 mPoint = new Point(0, TOP_Y_POINT); 121 int expectedScrollDistance = mAutoScroller.computeScrollDistance(-1); 122 mScrollAssert = (int dy) -> { 123 assertTrue(dy == expectedScrollDistance); 124 }; 125 mAutoScroller.run(); 126 } 127 128 @Test testCursorInScrollZone_bottom()129 public void testCursorInScrollZone_bottom() { 130 mActive = true; 131 mPoint = new Point(0, BOTTOM_Y_POINT); 132 int expectedScrollDistance = mAutoScroller.computeScrollDistance(1); 133 mScrollAssert = (int dy) -> { 134 assertTrue(dy == expectedScrollDistance); 135 }; 136 mAutoScroller.run(); 137 } 138 } 139