How to use order method of org.junit.runner.manipulation.Orderer class

Best junit code snippet using org.junit.runner.manipulation.Orderer.order

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1package junit.framework;
2
3import java.util.List;
4
5import org.junit.Ignore;
6import org.junit.runner.Describable;
7import org.junit.runner.Description;
8import org.junit.runner.Request;
9import org.junit.runner.Runner;
10import org.junit.runner.manipulation.Filter;
11import org.junit.runner.manipulation.Filterable;
12import org.junit.runner.manipulation.Orderer;
13import org.junit.runner.manipulation.InvalidOrderingException;
14import org.junit.runner.manipulation.NoTestsRemainException;
15import org.junit.runner.manipulation.Orderable;
16import org.junit.runner.manipulation.Sorter;
17
18/**
19 * The JUnit4TestAdapter enables running JUnit-4-style tests using a JUnit-3-style test runner.
20 *
21 * <p> To use it, add the following to a test class:
22 * <pre>
23      public static Test suite() {
24        return new JUnit4TestAdapter(<em>YourJUnit4TestClass</em>.class);
25      }
26</pre>
27 */
28public class JUnit4TestAdapter implements Test, Filterable, Orderable, Describable {
29    private final Class<?> fNewTestClass;
30
31    private final Runner fRunner;
32
33    private final JUnit4TestAdapterCache fCache;
34
35    public JUnit4TestAdapter(Class<?> newTestClass) {
36        this(newTestClass, JUnit4TestAdapterCache.getDefault());
37    }
38
39    public JUnit4TestAdapter(final Class<?> newTestClass, JUnit4TestAdapterCache cache) {
40        fCache = cache;
41        fNewTestClass = newTestClass;
42        fRunner = Request.classWithoutSuiteMethod(newTestClass).getRunner();
43    }
44
45    public int countTestCases() {
46        return fRunner.testCount();
47    }
48
49    public void run(TestResult result) {
50        fRunner.run(fCache.getNotifier(result, this));
51    }
52
53    // reflective interface for Eclipse
54    public List<Test> getTests() {
55        return fCache.asTestList(getDescription());
56    }
57
58    // reflective interface for Eclipse
59    public Class<?> getTestClass() {
60        return fNewTestClass;
61    }
62
63    public Description getDescription() {
64        Description description = fRunner.getDescription();
65        return removeIgnored(description);
66    }
67
68    private Description removeIgnored(Description description) {
69        if (isIgnored(description)) {
70            return Description.EMPTY;
71        }
72        Description result = description.childlessCopy();
73        for (Description each : description.getChildren()) {
74            Description child = removeIgnored(each);
75            if (!child.isEmpty()) {
76                result.addChild(child);
77            }
78        }
79        return result;
80    }
81
82    private boolean isIgnored(Description description) {
83        return description.getAnnotation(Ignore.class) != null;
84    }
85
86    @Override
87    public String toString() {
88        return fNewTestClass.getName();
89    }
90
91    public void filter(Filter filter) throws NoTestsRemainException {
92        filter.apply(fRunner);
93    }
94
95    public void sort(Sorter sorter) {
96        sorter.apply(fRunner);
97    }
98
99    /**
100     * {@inheritDoc}
101     *
102     * @since 4.13
103     */
104    public void order(Orderer orderer) throws InvalidOrderingException {
105        orderer.apply(fRunner);
106    }
107}
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