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1 /*
2  * Copyright (C) 2019 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.server.wm.intent;
18 
19 import org.json.JSONException;
20 
21 /**
22  * Exception to report differences in the {@link Persistence.StateDump} when verifying a
23  * {@link Persistence.TestCase} using the {@linkLaunchRunner#verify} method
24  */
25 public class StateComparisonException extends RuntimeException {
26     private Persistence.StateDump mExpected;
27     private Persistence.StateDump mActual;
28     private String stage;
29 
StateComparisonException(Persistence.StateDump expected, Persistence.StateDump actual, String stage)30     public StateComparisonException(Persistence.StateDump expected,
31             Persistence.StateDump actual, String stage) {
32         mExpected = expected;
33         mActual = actual;
34         this.stage = stage;
35     }
36 
37 
38     @Override
getMessage()39     public String getMessage() {
40         try {
41             String newLine = System.lineSeparator();
42             return new StringBuilder()
43                     .append(newLine)
44                     .append(stage)
45                     .append(newLine)
46                     .append("Expected:")
47                     .append(newLine)
48                     .append(mExpected.toJson().toString(2))
49                     .append(newLine)
50                     .append(newLine)
51                     .append("Actual:")
52                     .append(newLine)
53                     .append(mActual.toJson().toString(2))
54                     .append(newLine)
55                     .append(newLine)
56                     .toString();
57         } catch (JSONException e) {
58             e.printStackTrace();
59             return "json parse exception during error message creation";
60         }
61     }
62 
assertEndStatesEqual(Persistence.StateDump expected, Persistence.StateDump actual)63     public static void assertEndStatesEqual(Persistence.StateDump expected,
64             Persistence.StateDump actual) {
65         compareAndThrow(expected, actual, "Different endSates");
66     }
67 
assertInitialStateEqual(Persistence.StateDump expected, Persistence.StateDump actual)68     public static void assertInitialStateEqual(Persistence.StateDump expected,
69             Persistence.StateDump actual) {
70         compareAndThrow(expected, actual, "Different initial states");
71     }
72 
compareAndThrow(Persistence.StateDump expected, Persistence.StateDump actual, String stage)73     private static void compareAndThrow(Persistence.StateDump expected,
74             Persistence.StateDump actual, String stage) {
75         if (!expected.equals(actual)) {
76             throw new StateComparisonException(expected, actual, stage);
77         }
78     }
79 }
80