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How to use Ordering class of org.junit.runner.manipulation package

Best junit code snippet using org.junit.runner.manipulation.Ordering

Source:OrderableTest.java

...9import org.junit.runner.Request;10import org.junit.runner.RunWith;11import org.junit.runner.Runner;12import org.junit.runner.manipulation.Orderer;13import org.junit.runner.manipulation.InvalidOrderingException;14import org.junit.runner.manipulation.Orderable;15import org.junit.runner.manipulation.Sorter;16import org.junit.runner.notification.RunNotifier;17import org.junit.runners.BlockJUnit4ClassRunner;18@RunWith(Enclosed.class)19public class OrderableTest {20 21    public static class TestClassRunnerIsOrderable {22        private static String log = "";23        public static class OrderMe {24            @Test25            public void a() {26                log += "a";27            }28            @Test29            public void b() {30                log += "b";31            }32            @Test33            public void c() {34                log += "c";35            }36        }37        @Before38        public void resetLog() {39            log = "";40        }41        @Test42        public void orderingForwardWorksOnTestClassRunner() {43            Request forward = Request.aClass(OrderMe.class).orderWith(44                    AlphanumericOrdering.INSTANCE);45            new JUnitCore().run(forward);46            assertEquals("abc", log);47        }48        @Test49        public void orderingBackwardWorksOnTestClassRunner() {50            Request backward = Request.aClass(OrderMe.class).orderWith(51                    new ReverseAlphanumericOrdering());52            new JUnitCore().run(backward);53            assertEquals("cba", log);54        }55        @RunWith(Enclosed.class)56        public static class Enclosing {57            public static class A {58                @Test59                public void a() {60                    log += "Aa";61                }62                @Test63                public void b() {64                    log += "Ab";65                }66                @Test67                public void c() {68                    log += "Ac";69                }70            }71            public static class B {72                @Test73                public void a() {74                    log += "Ba";75                }76                @Test77                public void b() {78                    log += "Bb";79                }80                @Test81                public void c() {82                    log += "Bc";83                }84            }85        }86        @Test87        public void orderingForwardWorksOnSuite() {88            Request forward = Request.aClass(Enclosing.class).orderWith(89                    AlphanumericOrdering.INSTANCE);90            new JUnitCore().run(forward);91            assertEquals("AaAbAcBaBbBc", log);92        }93        @Test94        public void orderingBackwardWorksOnSuite() {95            Request backward = Request.aClass(Enclosing.class).orderWith(96                    new ReverseAlphanumericOrdering());97            new JUnitCore().run(backward);98            assertEquals("BcBbBaAcAbAa", log);99        }100    }101    public static class TestOrderableClassRunnerIsSortable {102        private static String log = "";103        /**104         * A Runner that implements {@link Orderable}.105         */106        public static class OrderableRunner extends Runner implements Orderable {107            private final BlockJUnit4ClassRunner delegate;108            public OrderableRunner(Class<?> klass) throws Throwable {109                delegate = new BlockJUnit4ClassRunner(klass);110            }111            112            @Override113            public void run(RunNotifier notifier) {114                delegate.run(notifier);115            }116                117            @Override118            public Description getDescription() {119                return delegate.getDescription();120            }121            public void order(Orderer orderer) throws InvalidOrderingException {122                delegate.order(orderer);123            }124            public void sort(Sorter sorter) {125                delegate.sort(sorter);126            }127        }128        @RunWith(OrderableRunner.class)129        public static class OrderMe {130            @Test131            public void a() {132                log += "a";133            }134            @Test135            public void b() {136                log += "b";137            }138            @Test139            public void c() {140                log += "c";141            }142        }143        @Before144        public void resetLog() {145            log = "";146        }147        @Test148        public void orderingorwardWorksOnTestClassRunner() {149            Request forward = Request.aClass(OrderMe.class).orderWith(150                    AlphanumericOrdering.INSTANCE);151            new JUnitCore().run(forward);152            assertEquals("abc", log);153        }154        @Test155        public void orderedBackwardWorksOnTestClassRunner() {156            Request backward = Request.aClass(OrderMe.class).orderWith(157                    new ReverseAlphanumericOrdering());158            new JUnitCore().run(backward);159            assertEquals("cba", log);160        }161    }162    public static class TestClassRunnerIsOrderableWithSuiteMethod {163        private static String log = "";164        public static class OrderMe {165            @Test166            public void a() {167                log += "a";168            }169            @Test170            public void b() {171                log += "b";172            }173            @Test174            public void c() {175                log += "c";176            }177            public static junit.framework.Test suite() {178                return new JUnit4TestAdapter(OrderMe.class);179            }180        }181        @Before182        public void resetLog() {183            log = "";184        }185        @Test186        public void orderingForwardWorksOnTestClassRunner() {187            Request forward = Request.aClass(OrderMe.class).orderWith(AlphanumericOrdering.INSTANCE);188            new JUnitCore().run(forward);189            assertEquals("abc", log);190        }191        @Test192        public void orderingBackwardWorksOnTestClassRunner() {193            Request backward = Request.aClass(OrderMe.class).orderWith(194                    new ReverseAlphanumericOrdering());195            new JUnitCore().run(backward);196            assertEquals("cba", log);197        }198    }199    public static class UnOrderableRunnersAreHandledWithoutCrashing {200        public static class UnOrderableRunner extends Runner {201            public UnOrderableRunner(Class<?> klass) {202            }203            @Override204            public Description getDescription() {205                return Description.EMPTY;206            }207            @Override208            public void run(RunNotifier notifier) {209            }210        }211        @RunWith(UnOrderableRunner.class)212        public static class UnOrderable {213            @Test214            public void a() {215            }216        }217        @Test218        public void unOrderablesAreHandledWithoutCrashing() {219            Request unordered = Request.aClass(UnOrderable.class).orderWith(220                    AlphanumericOrdering.INSTANCE);221            new JUnitCore().run(unordered);222        }223    }224}...

Source:JUnit38ClassRunner.java

...13import org.junit.runner.Runner;14import org.junit.runner.manipulation.Filter;15import org.junit.runner.manipulation.Filterable;16import org.junit.runner.manipulation.Orderer;17import org.junit.runner.manipulation.InvalidOrderingException;18import org.junit.runner.manipulation.NoTestsRemainException;19import org.junit.runner.manipulation.Orderable;20import org.junit.runner.manipulation.Sortable;21import org.junit.runner.manipulation.Sorter;22import org.junit.runner.notification.Failure;23import org.junit.runner.notification.RunNotifier;24public class JUnit38ClassRunner extends Runner implements Filterable, Orderable {25    private static final class OldTestClassAdaptingListener implements26            TestListener {27        private final RunNotifier notifier;28        private OldTestClassAdaptingListener(RunNotifier notifier) {29            this.notifier = notifier;30        }31        public void endTest(Test test) {32            notifier.fireTestFinished(asDescription(test));33        }34        public void startTest(Test test) {35            notifier.fireTestStarted(asDescription(test));36        }37        // Implement junit.framework.TestListener38        public void addError(Test test, Throwable e) {39            Failure failure = new Failure(asDescription(test), e);40            notifier.fireTestFailure(failure);41        }42        private Description asDescription(Test test) {43            if (test instanceof Describable) {44                Describable facade = (Describable) test;45                return facade.getDescription();46            }47            return Description.createTestDescription(getEffectiveClass(test), getName(test));48        }49        private Class<? extends Test> getEffectiveClass(Test test) {50            return test.getClass();51        }52        private String getName(Test test) {53            if (test instanceof TestCase) {54                return ((TestCase) test).getName();55            } else {56                return test.toString();57            }58        }59        public void addFailure(Test test, AssertionFailedError t) {60            addError(test, t);61        }62    }63    private volatile Test test;64    public JUnit38ClassRunner(Class<?> klass) {65        this(new TestSuite(klass.asSubclass(TestCase.class)));66    }67    public JUnit38ClassRunner(Test test) {68        super();69        setTest(test);70    }71    @Override72    public void run(RunNotifier notifier) {73        TestResult result = new TestResult();74        result.addListener(createAdaptingListener(notifier));75        getTest().run(result);76    }77    public TestListener createAdaptingListener(final RunNotifier notifier) {78        return new OldTestClassAdaptingListener(notifier);79    }80    @Override81    public Description getDescription() {82        return makeDescription(getTest());83    }84    private static Description makeDescription(Test test) {85        if (test instanceof TestCase) {86            TestCase tc = (TestCase) test;87            return Description.createTestDescription(tc.getClass(), tc.getName(),88                    getAnnotations(tc));89        } else if (test instanceof TestSuite) {90            TestSuite ts = (TestSuite) test;91            String name = ts.getName() == null ? createSuiteDescription(ts) : ts.getName();92            Description description = Description.createSuiteDescription(name);93            int n = ts.testCount();94            for (int i = 0; i < n; i++) {95                Description made = makeDescription(ts.testAt(i));96                description.addChild(made);97            }98            return description;99        } else if (test instanceof Describable) {100            Describable adapter = (Describable) test;101            return adapter.getDescription();102        } else if (test instanceof TestDecorator) {103            TestDecorator decorator = (TestDecorator) test;104            return makeDescription(decorator.getTest());105        } else {106            // This is the best we can do in this case107            return Description.createSuiteDescription(test.getClass());108        }109    }110    /**111     * Get the annotations associated with given TestCase.112     * @param test the TestCase.113     */114    private static Annotation[] getAnnotations(TestCase test) {115        try {116            Method m = test.getClass().getMethod(test.getName());117            return m.getDeclaredAnnotations();118        } catch (SecurityException e) {119        } catch (NoSuchMethodException e) {120        }121        return new Annotation[0];122    }123    private static String createSuiteDescription(TestSuite ts) {124        int count = ts.countTestCases();125        String example = count == 0 ? "" : String.format(" [example: %s]", ts.testAt(0));126        return String.format("TestSuite with %s tests%s", count, example);127    }128    public void filter(Filter filter) throws NoTestsRemainException {129        if (getTest() instanceof Filterable) {130            Filterable adapter = (Filterable) getTest();131            adapter.filter(filter);132        } else if (getTest() instanceof TestSuite) {133            TestSuite suite = (TestSuite) getTest();134            TestSuite filtered = new TestSuite(suite.getName());135            int n = suite.testCount();136            for (int i = 0; i < n; i++) {137                Test test = suite.testAt(i);138                if (filter.shouldRun(makeDescription(test))) {139                    filtered.addTest(test);140                }141            }142            setTest(filtered);143            if (filtered.testCount() == 0) {144                throw new NoTestsRemainException();145            }146        }147    }148    public void sort(Sorter sorter) {149        if (getTest() instanceof Sortable) {150            Sortable adapter = (Sortable) getTest();151            adapter.sort(sorter);152        }153    }154    /**155     * {@inheritDoc}156     *157     * @since 4.13158     */159    public void order(Orderer orderer) throws InvalidOrderingException {160        if (getTest() instanceof Orderable) {161            Orderable adapter = (Orderable) getTest();162            adapter.order(orderer);163        }164    }165    private void setTest(Test test) {166        this.test = test;167    }168    private Test getTest() {169        return test;170    }171}...

Source:JUnit4TestAdapter.java

...7import org.junit.runner.Runner;8import org.junit.runner.manipulation.Filter;9import org.junit.runner.manipulation.Filterable;10import org.junit.runner.manipulation.Orderer;11import org.junit.runner.manipulation.InvalidOrderingException;12import org.junit.runner.manipulation.NoTestsRemainException;13import org.junit.runner.manipulation.Orderable;14import org.junit.runner.manipulation.Sorter;15/**16 * The JUnit4TestAdapter enables running JUnit-4-style tests using a JUnit-3-style test runner.17 *18 * <p> To use it, add the following to a test class:19 * <pre>20      public static Test suite() {21        return new JUnit4TestAdapter(<em>YourJUnit4TestClass</em>.class);22      }23</pre>24 */25public class JUnit4TestAdapter implements Test, Filterable, Orderable, Describable {26    private final Class<?> fNewTestClass;27    private final Runner fRunner;28    private final JUnit4TestAdapterCache fCache;29    public JUnit4TestAdapter(Class<?> newTestClass) {30        this(newTestClass, JUnit4TestAdapterCache.getDefault());31    }32    public JUnit4TestAdapter(final Class<?> newTestClass, JUnit4TestAdapterCache cache) {33        fCache = cache;34        fNewTestClass = newTestClass;35        fRunner = Request.classWithoutSuiteMethod(newTestClass).getRunner();36    }37    public int countTestCases() {38        return fRunner.testCount();39    }40    public void run(TestResult result) {41        fRunner.run(fCache.getNotifier(result, this));42    }43    // reflective interface for Eclipse44    public List<Test> getTests() {45        return fCache.asTestList(getDescription());46    }47    // reflective interface for Eclipse48    public Class<?> getTestClass() {49        return fNewTestClass;50    }51    public Description getDescription() {52        Description description = fRunner.getDescription();53        return removeIgnored(description);54    }55    private Description removeIgnored(Description description) {56        if (isIgnored(description)) {57            return Description.EMPTY;58        }59        Description result = description.childlessCopy();60        for (Description each : description.getChildren()) {61            Description child = removeIgnored(each);62            if (!child.isEmpty()) {63                result.addChild(child);64            }65        }66        return result;67    }68    private boolean isIgnored(Description description) {69        return description.getAnnotation(Ignore.class) != null;70    }71    @Override72    public String toString() {73        return fNewTestClass.getName();74    }75    public void filter(Filter filter) throws NoTestsRemainException {76        filter.apply(fRunner);77    }78    public void sort(Sorter sorter) {79        sorter.apply(fRunner);80    }81    /**82     * {@inheritDoc}83     *84     * @since 4.1385     */86    public void order(Orderer orderer) throws InvalidOrderingException {87        orderer.apply(fRunner);88    }89}...

Source:OrderingRequest.java

1package org.junit.internal.requests;2import org.junit.internal.runners.ErrorReportingRunner;3import org.junit.runner.Request;4import org.junit.runner.Runner;5import org.junit.runner.manipulation.InvalidOrderingException;6import org.junit.runner.manipulation.Ordering;7/** @since 4.13 */8public class OrderingRequest extends MemoizingRequest {9    private final Request request;10    private final Ordering ordering;11    public OrderingRequest(Request request, Ordering ordering) {12        this.request = request;13        this.ordering = ordering;14    }15    @Override16    protected Runner createRunner() {17        Runner runner = request.getRunner();18        try {19            ordering.apply(runner);20        } catch (InvalidOrderingException e) {21            return new ErrorReportingRunner(ordering.getClass(), e);22        }23        return runner;24    }25}...

Source:ReverseAlphanumericSorter.java

1package org.junit.tests.manipulation;2import static java.util.Collections.reverseOrder;3import org.junit.runner.manipulation.Ordering;4import org.junit.runner.manipulation.Sorter;5/**6 * A sorter that orders tests reverse alphanumerically by test name.7 */8public final class ReverseAlphanumericSorter implements Ordering.Factory {9    public Ordering create(Ordering.Context context) {10        return new Sorter(reverseOrder(Comparators.alphanumeric()));11    }12}...

Ordering

Using AI Code Generation

1import org.junit.runner.JUnitCore;2import org.junit.runner.Result;3import org.junit.runner.manipulation.Ordering;4import org.junit.runner.notification.Failure;5public class TestRunner {6    public static void main(String[] args) {7        Result result = JUnitCore.runClasses(OrderingExample.class);8        for (Failure failure : result.getFailures()) {9            System.out.println(failure.toString());10        }11        System.out.println(result.wasSuccessful());12    }13}14test2(com.journaldev.junit.OrderingExample)15test1(com.journaldev.junit.OrderingExample)16@Target(ElementType.METHOD)17@Retention(RetentionPolicy.RUNTIME)18@TestMethodOrder(MethodOrderer.OrderAnnotation.class)19public @interface Order {20     * The order value for the annotated test method; lower values are executed21    int value();22}23@Order(2)24void test2() {25    System.out.println("test2");26}27@Order(1)28void test1() {29    System.out.println("test1");30}

Ordering

Using AI Code Generation

1import org.junit.runner.manipulation.Ordering;2import org.junit.runner.Description;3import org.junit.runner.notification.RunNotifier;4import org.junit.runner.Result;5public class TestOrdering extends Ordering {6    public static void main(String[] args) {7        Result result = org.junit.runner.JUnitCore.runClasses(TestOrdering.class);8        System.out.println("Result = " + result.wasSuccessful());9    }10    public void apply(Object test) {11    }12    public int compare(Description o1, Description o2) {13        return 0;14    }15}

Source: Why is processing a sorted array faster than processing an unsorted array?

1if (data[c] >= 128)2 sum += data[c];3

Source: What are the differences between a HashMap and a Hashtable in Java?

1// Test2clock_t start = clock();3long long a[] = {0, 0};4long long sum;56for (unsigned i = 0; i < 100000; ++i)7{8    // Primary loop9    for (unsigned c = 0; c < arraySize; ++c)10    {11        int j = (data[c] >> 7);12        a[j] += data[c];13    }14}1516double elapsedTime = static_cast<double>(clock() - start) / CLOCKS_PER_SEC;17sum = a[1];18

Source:What are the differences between a HashMap and a Hashtable in Java?

// Test
clock_t start = clock();
long long a[] = {0, 0};
long long sum;

for (unsigned i = 0; i < 100000; ++i)
{
    // Primary loop
    for (unsigned c = 0; c < arraySize; ++c)
    {
        int j = (data[c] >> 7);
        a[j] += data[c];
    }
}

double elapsedTime = static_cast<double>(clock() - start) / CLOCKS_PER_SEC;
sum = a[1];

Source: How do I efficiently iterate over each entry in a Java Map?

1int i= 0, j, k= arraySize;2while (i < k)3{4  j= (i + k) >> 1;5  if (data[j] >= 128)6    k= j;7  else8    i= j;9}10sum= 0;11for (; i < arraySize; i++)12  sum+= data[i];13

Source:How do I efficiently iterate over each entry in a Java Map?

int i= 0, j, k= arraySize;
while (i < k)
{
  j= (i + k) >> 1;
  if (data[j] >= 128)
    k= j;
  else
    i= j;
}
sum= 0;
for (; i < arraySize; i++)
  sum+= data[i];

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Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
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Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
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Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.