How to use putMethodToStub method of org.powermock.core.MockRepository class

Best Powermock code snippet using org.powermock.core.MockRepository.putMethodToStub

Source:Stubber.java Github

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...24 * Add a method that should be intercepted and return another value (25 * <code>returnObject</​code>) (i.e. the method is stubbed).26 */​27 public static void stubMethod(Method method, Object returnObject) {28 MockRepository.putMethodToStub(method, returnObject);29 }30 /​**31 * Add a method that should be intercepted and return another value (32 * <code>returnObject</​code>) (i.e. the method is stubbed).33 */​34 public static void stubMethod(Class<?> declaringClass, String methodName, Object returnObject) {35 if (declaringClass == null) {36 throw new IllegalArgumentException("declaringClass cannot be null");37 }38 if (methodName == null || methodName.length() == 0) {39 throw new IllegalArgumentException("methodName cannot be empty");40 }41 Method[] methods = Whitebox.getMethods(declaringClass, methodName);42 if (methods.length == 0) {43 throw new MethodNotFoundException(String.format("Couldn't find a method with name %s in the class hierarchy of %s", methodName,44 declaringClass.getName()));45 } else if (methods.length > 1) {46 throw new TooManyMethodsFoundException(String.format("Found %d methods with name %s in the class hierarchy of %s.", methods.length,47 methodName, declaringClass.getName()));48 }49 MockRepository.putMethodToStub(methods[0], returnObject);50 }51}...

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putMethodToStub

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1import org.powermock.core.MockRepository;2import org.powermock.core.classloader.annotations.PrepareForTest;3import org.powermock.modules.junit4.PowerMockRunner;4import org.powermock.modules.junit4.PowerMockRunnerDelegate;5import org.powermock.reflect.Whitebox;6import org.powermock.reflect.exceptions.ConstructorNotFoundException;7import org.powermock.reflect.exceptions.FieldNotFoundException;8import org.powermock.reflect.exceptions.MethodNotFoundException;9import org.powermock.reflect.exceptions.TooManyMethodsFoundException;10import org.powermock.reflect.internal.WhiteboxImpl;11import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;12import org.powermock.reflect.internal.WhiteboxImpl.MethodWrapper;13import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;14import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;15import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;16import org.powermock.reflect.internal.WhiteboxImpl.FieldWrapper;17import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;18import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;19import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;20import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;21import org.powermock.reflect.internal.WhiteboxImpl.FieldWrapper;22import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;23import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;24import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;25import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;26import org.powermock.reflect.internal.WhiteboxImpl.FieldWrapper;27import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;28import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;29import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;30import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;31import org.powermock.reflect.internal.WhiteboxImpl.FieldWrapper;32import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;33import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;34import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;35import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;36import org.powermock.reflect.internal.WhiteboxImpl.FieldWrapper;37import org.powermock.reflect.internal.WhiteboxImpl.ConstructorWrapper;38import org.powermock.reflect.internal.WhiteboxImpl.StaticConstructorWrapper;39import org.powermock.reflect.internal.WhiteboxImpl.StaticMethodWrapper;40import org.powermock.reflect.internal.WhiteboxImpl.StaticFieldWrapper;

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putMethodToStub

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1public class PutMethodToStubTest {2 public void testPutMethodToStub() throws Exception {3 final Foo foo = PowerMockito.mock(Foo.class);4 PowerMockito.doReturn("Hello world!").when(foo, "sayHello");5 final String result = foo.sayHello();6 Assert.assertEquals("Hello world!", result);7 }8 public static class Foo {9 public String sayHello() {10 return "Hello!";11 }12 }13}14We can also use PowerMockito.when() method to stub the method. The following code is an example of stubbing the method using PowerMockito.when() method:15public class WhenMethodToStubTest {16 public void testWhenMethodToStub() throws Exception {17 final Foo foo = PowerMockito.mock(Foo.class);18 PowerMockito.when(foo.sayHello()).thenReturn("Hello world!");19 final String result = foo.sayHello();20 Assert.assertEquals("Hello world!", result);21 }22 public static class Foo {23 public String sayHello() {24 return "Hello!";25 }26 }27}28We can also use PowerMockito.doAnswer() method to stub the method. The following code is an example of stubbing the method using PowerMockito.doAnswer() method:29public class DoAnswerMethodToStubTest {30 public void testDoAnswerMethodToStub() throws Exception {31 final Foo foo = PowerMockito.mock(Foo.class);32 PowerMockito.doAnswer(new Answer<String>() {33 public String answer(final InvocationOnMock invocation)

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putMethodToStub

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1public class StubbingTest {2 public void testStubbing() throws Exception {3 final MyService myService = PowerMockito.mock(MyService.class);4 PowerMockito.doReturn("Hello World!").when(myService).doSomething();5 Assert.assertEquals("Hello World!", myService.doSomething());6 }7}8public class MyService {9 public static String doSomething() {10 return MyUtil.doSomething();11 }12}13public class MyUtil {14 public static String doSomething() {15 return "Hello World!";16 }17}18import org.junit.Assert;19import org.junit.Test;20import org.powermock.api.mockito.PowerMockito;21import org.powermock.core.classloader.annotations.PrepareForTest;22@PrepareForTest(MyUtil.class)23public class StubbingTest {24 public void testMockingStaticMethod() throws Exception {25 PowerMockito.mockStatic(MyUtil.class);26 PowerMockito.when(MyUtil.doSomething()).thenReturn("Hello World!");27 Assert.assertEquals("Hello World!", MyService.doSomething());28 }29}30We have mocked the doSomething() method of MyUtil class using mockStatic() method of PowerMock

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