Best junit code snippet using org.junit.runners.model.Interface MemberValueConsumer
Source: MemberValueConsumer.java
1package org.junit.runners.model;2/**3 * Represents a receiver for values of annotated fields/methods together with the declaring member.4 *5 * @see TestClass#collectAnnotatedFieldValues(Object, Class, Class, MemberValueConsumer)6 * @see TestClass#collectAnnotatedMethodValues(Object, Class, Class, MemberValueConsumer)7 * @since 4.138 */9public interface MemberValueConsumer<T> {10 /**11 * Receives the next value and its declaring member.12 *13 * @param member declaring member ({@link FrameworkMethod or {@link FrameworkField}}14 * @param value the value of the next member15 */16 void accept(FrameworkMember member, T value);17}...
Interface MemberValueConsumer
Using AI Code Generation
1public class TestWithMemberValueConsumer implements MemberValueConsumer {2 public void accept(String name, Object value) {3 System.out.println("Name: " + name + " Value: " + value);4 }5}6public class TestWithClassMemberValueConsumer implements ClassMemberValueConsumer {7 public void accept(Class<?> clazz, String name, Object value) {8 System.out.println("Class: " + clazz + " Name: " + name + " Value: " + value);9 }10}11public class TestWithMethodMemberValueConsumer implements MethodMemberValueConsumer {12 public void accept(Method method, String name, Object value) {13 System.out.println("Method: " + method + " Name: " + name + " Value: " + value);14 }15}16public class TestWithFieldMemberValueConsumer implements FieldMemberValueConsumer {17 public void accept(Field field, String name, Object value) {18 System.out.println("Field: " + field + " Name: " + name + " Value: " + value);19 }20}21public class TestWithAnnotationMemberValueConsumer implements AnnotationMemberValueConsumer {22 public void accept(Annotation annotation, String name, Object value) {23 System.out.println("Annotation: " + annotation + " Name: " + name + " Value: " + value);24 }25}26public class TestWithAnnotationMemberValueConsumer implements AnnotationMemberValueConsumer {27 public void accept(Annotation annotation, String name, Object value) {28 System.out.println("Annotation: " + annotation + " Name: " + name + " Value: " + value);29 }30}31public class TestWithAnnotationMemberValueConsumer implements AnnotationMemberValueConsumer {32 public void accept(Annotation annotation, String name, Object value) {33 System.out.println("Annotation: " + annotation + " Name: " + name +
Interface MemberValueConsumer
Using AI Code Generation
1package org.junit.runners.model;2public interface MemberValueConsumer {3 void consume(Object value);4}5package org.junit.runners.model;6import org.junit.runners.model.FrameworkField;7import org.junit.runners.model.FrameworkMethod;8public class MemberValueConsumer {9 public void consume(Object value) {10 if (value instanceof FrameworkField) {11 FrameworkField field = (FrameworkField) value;12 System.out.println("FrameworkField: " + field.getName());13 } else if (value instanceof FrameworkMethod) {14 FrameworkMethod method = (FrameworkMethod) value;15 System.out.println("FrameworkMethod: " + method.getName());16 }17 }18}19package org.junit.runners.model;20public interface TestClass {21 public void forEachTestField(MemberValueConsumer consumer);22 public void forEachTestMethod(MemberValueConsumer consumer);23}24package org.junit.runners.model;25import org.junit.runners.model.FrameworkField;26import org.junit.runners.model.FrameworkMethod;27import org.junit.runners.model.TestClass;28public class TestClass {29 public void forEachTestField(MemberValueConsumer consumer) {30 for (FrameworkField each : getAnnotatedFields()) {31 consumer.consume(each);32 }33 }34 public void forEachTestMethod(MemberValueConsumer consumer) {35 for (FrameworkMethod each : getAnnotatedMethods()) {36 consumer.consume(each);37 }38 }39}40package org.junit.runners.model;41public class Statement {42 public void evaluate() throws Throwable {43 }44}45package org.junit.runners.model;46public class Statement {47 public void evaluate() throws Throwable {48 }49}50package org.junit.runners.model;51public class Statement {52 public void evaluate() throws Throwable {53 }54}55package org.junit.runners.model;56import org.junit.runners.model.Statement;57public class Statement {58 public void evaluate() throws Throwable {59 }60}
Interface MemberValueConsumer
Using AI Code Generation
1public class JunitRunnerExample {2 public void test1() {3 System.out.println("test1");4 }5 public void test2() {6 System.out.println("test2");7 }8 public void test3() {9 System.out.println("test3");10 }11 public void test4() {12 System.out.println("test4");13 }14 public void test5() {15 System.out.println("test5");16 }17 public void test6() {18 System.out.println("test6");19 }20 public void test7() {21 System.out.println("test7");22 }23 public void test8() {24 System.out.println("test8");25 }26 public void test9() {27 System.out.println("test9");28 }29 public void test10() {30 System.out.println("test10");31 }32 public void test11() {33 System.out.println("test11");34 }35 public void test12() {36 System.out.println("test12");37 }38 public void test13() {39 System.out.println("test13");40 }41 public void test14() {42 System.out.println("test14");43 }44 public void test15() {45 System.out.println("test15");46 }47 public void test16() {48 System.out.println("test16");49 }50 public void test17() {51 System.out.println("test17");52 }53 public void test18() {54 System.out.println("test18");55 }56 public void test19() {57 System.out.println("test19");58 }59 public void test20() {60 System.out.println("test20");61 }62 public void test21() {63 System.out.println("test21");64 }65 public void test22() {66 System.out.println("test22");67 }68 public void test23() {69 System.out.println("test
Interface MemberValueConsumer
Using AI Code Generation
1import org.junit.runners.model.MemberValueConsumer;2import org.junit.runners.model.TestClass;3import org.junit.runners.model.TestClass.TestClassConstructor;4import org.junit.runners.model.TestClass.TestClassField;5import org.junit.runners.model.TestClass.TestClassMethod;6public class TestClassTest {7 public void test() {8 TestClass testClass = new TestClass(TestClassTest.class);9 List<TestClassField> fields = testClass.getAnnotatedFields(Test.class);10 List<TestClassMethod> methods = testClass.getAnnotatedMethods(Test.class);11 List<TestClassConstructor> constructors = testClass.getAnnotatedConstructors(Test.class);12 List<Annotation> annotations = testClass.getAnnotations();13 testClass.consumeMemberValues(new MemberValueConsumer() {14 public void consume(Member member, Object value) {15 System.out.println("Member: " + member);16 System.out.println("Value: " + value);17 }18 });19 }20}
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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