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
17package vogar.target.junit;
18
19import java.util.List;
20import org.junit.rules.TestRule;
21import org.junit.runner.Description;
22import org.junit.runner.notification.RunNotifier;
23import org.junit.runners.ParentRunner;
24import org.junit.runners.model.InitializationError;
25import org.junit.runners.model.Statement;
26
27/**
28 * A {@link ParentRunner} whose children are {@link DescribableStatement} instances.
29 *
30 * <p>This is a generally useful form of {@link ParentRunner} that can easily be customized.
31 *
32 * <p>This is used for JUnit3 based classes which may have multiple constructors (a default and
33 * one that takes the test name) so it passes a {@link Dummy} class to the parent and overrides the
34 * {@link #getName()} method. That works because this does not use any information from the supplied
35 * class.
36 */
37public class ParentStatementRunner extends ParentRunner<DescribableStatement> {
38
39    private final String name;
40    private final List<DescribableStatement> statements;
41    private final TestRule testRule;
42
43    public ParentStatementRunner(Class<?> testClass, List<DescribableStatement> statements,
44                                 RunnerParams runnerParams)
45            throws InitializationError {
46        super(Dummy.class);
47        name = testClass.getName();
48        this.statements = statements;
49        testRule = runnerParams.getTestRule();
50    }
51
52    @Override
53    protected String getName() {
54        return name;
55    }
56
57    @Override
58    protected List<DescribableStatement> getChildren() {
59        return statements;
60    }
61
62    @Override
63    protected Description describeChild(DescribableStatement child) {
64        return child.getDescription();
65    }
66
67    @Override
68    protected void runChild(final DescribableStatement child, RunNotifier notifier) {
69        Description description = describeChild(child);
70        Statement statement = child;
71        statement = testRule.apply(statement, description);
72        ParentRunnerHelper.abortingRunLeaf(statement, description, notifier);
73    }
74
75    /**
76     * ParentRunner requires that the class be public.
77     */
78    public static class Dummy {
79    }
80}
81