How to use Annotation Type TestedOn class of org.junit.experimental.theories.suppliers package

Best junit code snippet using org.junit.experimental.theories.suppliers.Annotation Type TestedOn

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1package org.junit.experimental.theories.suppliers;2import java.lang.annotation.ElementType;3import java.lang.annotation.Retention;4import java.lang.annotation.RetentionPolicy;5import java.lang.annotation.Target;6import org.junit.experimental.theories.ParametersSuppliedBy;7@ParametersSuppliedBy(TestedOnSupplier.class)8@Retention(RetentionPolicy.RUNTIME)9@Target({ElementType.PARAMETER})10public @interface TestedOn {11 int[] ints();12}13/​* Location: /​home/​arpit/​Downloads/​Picking-Tool-6.5.2.jar!/​org/​junit/​experimental/​theories/​suppliers/​TestedOn.class14 * Java compiler version: 5 (49.0)15 * JD-Core Version: 1.1.316 */​...

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Annotation Type TestedOn

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1import org.junit.experimental.theories.suppliers.TestedOn;2public class Test {3public void test(@TestedOn(ints = { 0, 1, 2, 3, 4, 5 }) int i) {4 System.out.println(i);5}6}7import org.junit.experimental.theories.Theories;8import org.junit.experimental.theories.Theory;9import org.junit.runner.RunWith;10@RunWith(Theories.class)11public class Test {12public void test(@TestedOn(ints = { 0, 1, 2, 3, 4, 5 }) int i) {13 System.out.println(i);14}15}16import org.junit.experimental.theories.Theories;17import org.junit.experimental.theories.Theory;18import org.junit.runner.RunWith;19@RunWith(Theories.class)20public class Test {21public void test(@TestedOn(ints = { 0, 1, 2, 3, 4, 5 }) int i) {22 System.out.println(i);23}24}25import org.junit.experimental.theories.Theories;26import org.junit.experimental.theories.Theory;27import org.junit.runner.RunWith;28@RunWith(Theories.class)29public class Test {30public void test(@TestedOn(ints = { 0, 1, 2, 3, 4, 5 }) int i) {31 System.out.println(i);32}33}34import org.junit.experimental.theories.Theories;35import org.junit.experimental.theories.Theory;36import org.junit.runner.RunWith;37@RunWith(Theories.class)38public class Test {39public void test(@TestedOn(ints = { 0, 1, 2, 3, 4, 5 }) int i) {40 System.out.println(i);41}42}

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Discussion

JUnit 4 Expected Exception type

java: how to mock Calendar.getInstance()?

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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.

https://stackoverflow.com/questions/16723715/junit-4-expected-exception-type

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