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.base;
18 
19 import static junit.framework.Assert.assertEquals;
20 import static junit.framework.Assert.assertFalse;
21 import static junit.framework.TestCase.assertNull;
22 import static junit.framework.TestCase.assertTrue;
23 
24 import android.provider.DocumentsContract;
25 import android.support.test.filters.SmallTest;
26 import android.support.test.runner.AndroidJUnit4;
27 
28 import com.android.documentsui.testing.Parcelables;
29 
30 import org.junit.Before;
31 import org.junit.Test;
32 import org.junit.runner.RunWith;
33 
34 import java.util.Objects;
35 
36 @RunWith(AndroidJUnit4.class)
37 @SmallTest
38 public class DocumentStackTest {
39     private static final RootInfo ROOT_1;
40     private static final RootInfo ROOT_2;
41 
42     private static final DocumentInfo DIR_1;
43     private static final DocumentInfo DIR_2;
44 
45     private DocumentStack mStack;
46 
47     static {
48         ROOT_1 = new RootInfo();
49         ROOT_1.rootId = "home";
50         ROOT_2 = new RootInfo();
51         ROOT_2.rootId = "downloads";
52 
53         DIR_1 = createDir("first");
54         DIR_2 = createDir("second");
55     }
56 
createDir(String docId)57     private static DocumentInfo createDir(String docId) {
58         DocumentInfo info = new DocumentInfo();
59         info.authority = "authority";
60         info.documentId = docId;
61         info.displayName = docId;
62         info.mimeType = DocumentsContract.Document.MIME_TYPE_DIR;
63         info.deriveFields();
64         return info;
65     }
66 
67     @Before
setUp()68     public void setUp() {
69         mStack = new DocumentStack();
70     }
71 
72     @Test
testInitialStateEmpty()73     public void testInitialStateEmpty() {
74         assertFalse(mStack.hasLocationChanged());
75         assertTrue(mStack.isEmpty());
76         assertEquals(0, mStack.size());
77         assertNull(mStack.getRoot());
78     }
79 
80     @Test
testPushDocument_ModifiesStack()81     public void testPushDocument_ModifiesStack() {
82         mStack.push(DIR_1);
83         mStack.push(DIR_2);
84         assertEquals(DIR_2, mStack.peek());
85     }
86 
87     @Test
testPopDocument_ModifiesStack()88     public void testPopDocument_ModifiesStack() {
89         mStack.push(DIR_1);
90         mStack.push(DIR_2);
91         mStack.pop();
92         assertEquals(DIR_1, mStack.peek());
93     }
94 
95     @Test
testGetDocument()96     public void testGetDocument() {
97         mStack.push(DIR_1);
98         mStack.push(DIR_2);
99 
100         assertEquals(DIR_1, mStack.get(0));
101         assertEquals(DIR_2, mStack.get(1));
102     }
103 
104     @Test
testChangeRoot()105     public void testChangeRoot() {
106         mStack.changeRoot(ROOT_1);
107 
108         assertEquals(ROOT_1, mStack.getRoot());
109     }
110 
111     @Test
testChangeRoot_ClearsStack()112     public void testChangeRoot_ClearsStack() {
113         mStack.push(DIR_1);
114 
115         mStack.changeRoot(ROOT_1);
116 
117         assertTrue(mStack.isEmpty());
118         assertEquals(0, mStack.size());
119     }
120 
121     @Test
testReset()122     public void testReset() {
123         mStack.changeRoot(ROOT_1);
124         mStack.push(DIR_1);
125 
126         mStack.reset();
127 
128         assertNull(mStack.getRoot());
129         assertTrue(mStack.isEmpty());
130         assertEquals(0, mStack.size());
131     }
132 
133     @Test
testCopyConstructor()134     public void testCopyConstructor() {
135         mStack.changeRoot(ROOT_1);
136         mStack.push(DIR_1);
137         mStack.push(DIR_2);
138 
139         DocumentStack stack = new DocumentStack(mStack);
140 
141         assertEquals(2, stack.size());
142         assertEquals(DIR_1, stack.get(0));
143         assertEquals(DIR_2, stack.get(1));
144         assertEquals(ROOT_1, stack.getRoot());
145     }
146 
147     @Test
testCopyConstructor_MakesDeepCopy()148     public void testCopyConstructor_MakesDeepCopy() {
149         mStack.changeRoot(ROOT_1);
150         mStack.push(DIR_1);
151         mStack.push(DIR_2);
152 
153         DocumentStack stack = new DocumentStack(mStack);
154 
155         mStack.changeRoot(ROOT_2);
156 
157         assertEquals(2, stack.size());
158         assertEquals(DIR_1, stack.get(0));
159         assertEquals(DIR_2, stack.get(1));
160         assertEquals(ROOT_1, stack.getRoot());
161     }
162 
163     @Test
testPushDocument_ChangesLocation()164     public void testPushDocument_ChangesLocation() {
165         mStack.push(DIR_1);
166 
167         assertTrue(mStack.hasLocationChanged());
168     }
169 
170     @Test
testParceling()171     public void testParceling() {
172         mStack.changeRoot(ROOT_1);
173         mStack.push(DIR_1);
174         mStack.push(DIR_2);
175 
176         Parcelables.assertParcelable(mStack, 0, (DocumentStack left, DocumentStack right) -> {
177             if (!Objects.equals(left.getRoot(), right.getRoot()) || left.size() != right.size()) {
178                 return false;
179             }
180 
181             for (int i = 0; i < left.size(); ++i) {
182                 if (!Objects.equals(left.get(i), right.get(i))) {
183                     return false;
184                 }
185             }
186 
187             return true;
188         });
189     }
190 }
191