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 android.widget.cts.util;
18 
19 import org.hamcrest.Description;
20 import org.hamcrest.Matcher;
21 import org.hamcrest.TypeSafeMatcher;
22 
23 import java.util.List;
24 
25 public class TestUtilsMatchers {
26     /**
27      * Returns a matcher that matches lists of int values that are in ascending order.
28      */
inAscendingOrder()29     public static Matcher<List<Integer>> inAscendingOrder() {
30         return new TypeSafeMatcher<List<Integer>>() {
31             private String mFailedDescription;
32 
33             @Override
34             public void describeTo(Description description) {
35                 description.appendText(mFailedDescription);
36             }
37 
38             @Override
39             protected boolean matchesSafely(List<Integer> item) {
40                 int itemCount = item.size();
41 
42                 if (itemCount >= 2) {
43                     for (int i = 0; i < itemCount - 1; i++) {
44                         int curr = item.get(i);
45                         int next = item.get(i + 1);
46 
47                         if (curr > next) {
48                             mFailedDescription = "Values should increase between #" + i +
49                                     ":" + curr + " and #" + (i + 1) + ":" + next;
50                             return false;
51                         }
52                     }
53                 }
54 
55                 return true;
56             }
57         };
58     }
59 }
60