Best junit code snippet using org.junit.runner.manipulation.Ordering.Context
Source: ReverseAlphanumericSorter.java
...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}...
Source: Alphanumeric.java
1public final class org.junit.runner.manipulation.Alphanumeric extends org.junit.runner.manipulation.Sorter implements org.junit.runner.manipulation.Ordering$Factory {2 public org.junit.runner.manipulation.Alphanumeric();3 public org.junit.runner.manipulation.Ordering create(org.junit.runner.manipulation.Ordering$Context);4 static {};5}...
Source: Ordering$Context.java
1public class org.junit.runner.manipulation.Ordering$Context {2 public org.junit.runner.Description getTarget();3 org.junit.runner.manipulation.Ordering$Context(org.junit.runner.Description, org.junit.runner.manipulation.Ordering$1);4}...
Source: Ordering$Factory.java
1public interface org.junit.runner.manipulation.Ordering$Factory {2 public abstract org.junit.runner.manipulation.Ordering create(org.junit.runner.manipulation.Ordering$Context);3}...
Ordering.Context
Using AI Code Generation
1import org.junit.runner.manipulation.Ordering;2import org.junit.runner.manipulation.Sorter;3import org.junit.runner.notification.RunNotifier;4import org.junit.runners.model.InitializationError;5import org.junit.runners.model.RunnerBuilder;6public class OrderedRunner extends org.junit.runners.BlockJUnit4ClassRunner {7 public OrderedRunner(Class<?> klass, RunnerBuilder builder) throws InitializationError {8 super(klass);9 setScheduler(new RunnerScheduler() {10 public void schedule(Runnable childStatement) {11 childStatement.run();12 }13 public void finished() {14 }15 });16 }17 public void run(RunNotifier notifier) {18 Sorter sorter = new Sorter(new Ordering() {19 public int compare(Object o1, Object o2) {20 return 0;21 }22 });23 sorter.apply(this);24 super.run(notifier);25 }26}27import org.junit.runner.manipulation.Ordering;28import org.junit.runner.manipulation.Sorter;29import org.junit.runner.notification.RunNotifier;30import org.junit.runners.model.InitializationError;31import org.junit.runners.model.RunnerBuilder;32public class OrderedRunner extends org.junit.runners.BlockJUnit4ClassRunner {33 public OrderedRunner(Class<?> klass, RunnerBuilder builder) throws InitializationError {34 super(klass);35 setScheduler(new RunnerScheduler() {36 public void schedule(Runnable childStatement) {37 childStatement.run();38 }39 public void finished() {40 }41 });42 }43 public void run(RunNotifier notifier) {44 Sorter sorter = new Sorter(new Ordering() {45 public int compare(Object o1, Object o2) {46 return 0;47 }48 });49 sorter.apply(this);50 super.run(notifier);51 }52}
Ordering.Context
Using AI Code Generation
1import org.junit.runner.manipulation.Ordering;2import org.junit.runner.Description;3import org.junit.runner.Runner;4import org.junit.runner.notification.RunNotifier;5import java.util.Comparator;6import java.util.List;7public class CustomOrdering extends Ordering {8 private final Comparator<Description> comparator;9 public CustomOrdering(Comparator<Description> comparator) {10 this.comparator = comparator;11 }12 public void apply(List<Runner> runners) {13 runners.sort((a, b) -> comparator.compare(a.getDescription(), b.getDescription()));14 }15}16import org.junit.runners.model.Ordering;17import org.junit.runners.model.FrameworkMethod;18import java.util.Comparator;19import java.util.List;20public class CustomOrdering extends Ordering {21 private final Comparator<FrameworkMethod> comparator;22 public CustomOrdering(Comparator<FrameworkMethod> comparator) {23 this.comparator = comparator;24 }25 public void apply(List<FrameworkMethod> methods) {26 methods.sort(comparator);27 }28}29import org.junit.runner.manipulation.Ordering;30import org.junit.runner.Description;31import org.junit.runner.notification.RunNotifier;32import java.util.Comparator;33import java.util.List;34public class CustomOrdering extends Ordering {35 private final Comparator<Description> comparator;36 public CustomOrdering(Comparator<Description> comparator) {37 this.comparator = comparator;38 }39 public void apply(List<Description> descriptions) {40 descriptions.sort(comparator);41 }42}43import org.junit.runner.manipulation.Ordering;44import org.junit.runner.Description;45import org.junit.runner.notification.RunNotifier;46import java.util.Comparator;47import java.util.List;48public class CustomOrdering extends Ordering {49 private final Comparator<Description> comparator;50 public CustomOrdering(Comparator<Description> comparator) {51 this.comparator = comparator;52 }53 public void apply(List<Description> descriptions) {54 descriptions.sort(comparator);55 }56}57import org.junit.runner.manipulation.Ordering;58import org.junit.runner.Description;59import org.junit.runner.notification.RunNotifier;60import java.util.Comparator;61import java.util.List;
Ordering.Context
Using AI Code Generation
1import org.junit.runner.manipulation.Ordering;2import org.junit.runner.Description;3import org.junit.runner.manipulation.Ordering;4public class MyOrdering extends Ordering {5 public void apply(List<Description> list) {6 Collections.sort(list, new Comparator<Description>() {7 public int compare(Description d1, Description d2) {8 return d1.getMethodName().compareTo(d2.getMethodName());9 }10 });11 }12}13import org.junit.runner.manipulation.Ordering;14import org.junit.runner.Description;15import org.junit.runner.manipulation.Ordering;16public class MyOrdering extends Ordering {17 public void apply(List<Description> list) {18 Collections.sort(list, new Comparator<Description>() {19 public int compare(Description d1, Description d2) {20 return d1.getMethodName().compareTo(d2.getMethodName());21 }22 });23 }24}25return d2.getMethodName().compareTo(d1.getMethodName());26import org.junit.runner.manipulation.Ordering;27import org.junit.runner.Description;28import org.junit.runner.manipulation.Ordering;29public class MyOrdering extends Ordering {30 public void apply(List<Description> list) {31 Collections.shuffle(list);32 }33}
JUnit 4 Expected Exception type
java: how to mock Calendar.getInstance()?
Changing names of parameterized tests
Mocking a class vs. mocking its interface
jUnit ignore @Test methods from base class
Important frameworks/tools to learn
Unit testing a Java Servlet
Meaning of delta or epsilon argument of assertEquals for double values
Different teardown for each @Test in jUnit
Best way to automagically migrate tests from JUnit 3 to JUnit 4?
There's actually an alternative to the @Test(expected=Xyz.class)
in JUnit 4.7 using Rule
and ExpectedException
In your test case you declare an ExpectedException
annotated with @Rule
, and assign it a default value of ExpectedException.none()
. Then in your test that expects an exception you replace the value with the actual expected value. The advantage of this is that without using the ugly try/catch method, you can further specify what the message within the exception was
@Rule public ExpectedException thrown= ExpectedException.none();
@Test
public void myTest() {
thrown.expect( Exception.class );
thrown.expectMessage("Init Gold must be >= 0");
rodgers = new Pirate("Dread Pirate Rodgers" , -100);
}
Using this method, you might be able to test for the message in the generic exception to be something specific.
ADDITION
Another advantage of using ExpectedException
is that you can more precisely scope the exception within the context of the test case. If you are only using @Test(expected=Xyz.class)
annotation on the test, then the Xyz exception can be thrown anywhere in the test code -- including any test setup or pre-asserts within the test method. This can lead to a false positive.
Using ExpectedException, you can defer specifying the thrown.expect(Xyz.class)
until after any setup and pre-asserts, just prior to actually invoking the method under test. Thus, you more accurately scope the exception to be thrown by the actual method invocation rather than any of the test fixture itself.
JUnit 5 NOTE:
JUnit 5 JUnit Jupiter has removed @Test(expected=...)
, @Rule
and ExpectedException
altogether. They are replaced with the new assertThrows()
, which requires the use of Java 8 and lambda syntax. ExpectedException
is still available for use in JUnit 5 through JUnit Vintage. Also JUnit Jupiter will also continue to support JUnit 4 ExpectedException
through use of the junit-jupiter-migrationsupport module, but only if you add an additional class-level annotation of @EnableRuleMigrationSupport
.
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