How to use MockHandler class of org.mockito.invocation package

Best Mockito code snippet using org.mockito.invocation.MockHandler

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...4 */​5package org.mockito.internal.handler;67import org.mockito.exceptions.Reporter;8import org.mockito.internal.InternalMockHandler;9import org.mockito.internal.listeners.NotifiedMethodInvocationReport;10import org.mockito.internal.stubbing.InvocationContainer;11import org.mockito.invocation.Invocation;12import org.mockito.invocation.MockHandler;13import org.mockito.listeners.InvocationListener;14import org.mockito.mock.MockCreationSettings;15import org.mockito.stubbing.Answer;16import org.mockito.stubbing.VoidMethodStubbable;1718import java.util.List;1920/​**21 * Handler, that call all listeners wanted for this mock, before delegating it22 * to the parameterized handler.23 *24 * Also imposterize MockHandlerImpl, delegate all call of InternalMockHandler to the real mockHandler25 */​26class InvocationNotifierHandler<T> implements MockHandler, InternalMockHandler<T> {2728 private List<InvocationListener> invocationListeners;29 private InternalMockHandler<T> mockHandler;3031 public InvocationNotifierHandler(InternalMockHandler<T> mockHandler, MockCreationSettings settings) {32 this.mockHandler = mockHandler;33 this.invocationListeners = settings.getInvocationListeners();34 }3536 public Object handle(Invocation invocation) throws Throwable {37 try {38 Object returnedValue = mockHandler.handle(invocation);39 notifyMethodCall(invocation, returnedValue);40 return returnedValue;41 } catch (Throwable t){42 notifyMethodCallException(invocation, t);43 throw t;44 }45 } ...

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MockHandler

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1package com.example;2import org.mockito.invocation.MockHandler;3import org.mockito.invocation.MockHandlerFactory;4public class ExampleMockHandlerFactory implements MockHandlerFactory {5 public MockHandler createHandler(Object mock) {6 return new ExampleMockHandler();7 }8}9package com.example;10import org.mockito.invocation.MockHandler;11import org.mockito.invocation.MockHandlerFactory;12public class ExampleMockHandler implements MockHandler {13 public Object handle(Object proxy, java.lang.reflect.Method method, Object[] args) throws Throwable {14 return null;15 }16}17package com.example;18import org.mockito.invocation.MockHandler;19import org.mockito.invocation.MockHandlerFactory;20public class ExampleMockHandlerFactory implements MockHandlerFactory {21 public MockHandler createHandler(Object mock) {22 return new ExampleMockHandler();23 }24}25package com.example;26import org.mockito.invocation.MockHandler;27import org.mockito.invocation.MockHandlerFactory;28public class ExampleMockHandlerFactory implements MockHandlerFactory {29 public MockHandler createHandler(Object mock) {30 return new ExampleMockHandler();31 }32}33package com.example;34import org.mockito.invocation.MockHandler;35import org.mockito.invocation.MockHandlerFactory;36public class ExampleMockHandler implements MockHandler {37 public Object handle(Object proxy, java.lang.reflect.Method method, Object[] args) throws Throwable {38 return null;39 }40}41package com.example;42import org.mockito.invocation.MockHandler;43import org.mockito.invocation.MockHandlerFactory;44public class ExampleMockHandlerFactory implements MockHandlerFactory {45 public MockHandler createHandler(Object mock) {46 return new ExampleMockHandler();47 }48}49package com.example;50import org.mockito.invocation.MockHandler;51import org.mockito.invocation.MockHandlerFactory;52public class ExampleMockHandlerFactory implements MockHandlerFactory {53 public MockHandler createHandler(Object mock) {54 return new ExampleMockHandler();55 }56}

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MockHandler

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1import static org.mockito.Mockito.*;2import org.mockito.invocation.MockHandler;3import org.mockito.invocation.MockHandlerInterface;4import org.mockito.invocation.InvocationOnMock;5import org.mockito.stubbing.Answer;6import static org.mockito.Mockito.*;7import org.mockito.Mockito;8import static org.mockito.Mockito.*;9import org.mockito.invocation.InvocationOnMock;10import static org.mockito.Mockito.*;11import org.mockito.stubbing.Answer;12import static org.mockito.Mockito.*;13import org.mockito.invocation.MockHandlerInterface;14import static org.mockito.Mockito.*;15import org.mockito.invocation.MockHandler;16import static org.mockito.Mockito.*;17import org.mockito.invocation.MockHandlerInterface;18import static org.mockito.Mockito.*;19import org.mockito.invocation.MockHandler;20import static org.mockito.Mockito.*;21import org.mockito.invocation.MockHandlerInterface;22import static org.mockito.Mockito.*;23import org.mockito.invocation.MockHandler;24import static org.mockito.Mockito.*;25import org.mockito.invocation.MockHandlerInterface;26import static org.mockito.Mockito.*;27import org.mockito.invocation.MockHandler;28import static org.mockito.Mockito.*;29import org.mockito.invocation.MockHandlerInterface;30import static org.mockito.Mockito.*;31import org.mockito.invocation.MockHandler;32import static org.mockito.Mockito.*;33import org.mockito.invocation.MockHandlerInterface;34import static org.mockito.Mockito.*;35import org.mockito.invocation.MockHandler;36import static org.mockito.Mockito.*;37import org.mockito.invocation.MockHandlerInterface

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MockHandler

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1MockHandler handler = new MockHandler() {2 public Object handle(Invocation invocation) throws Throwable {3 return null;4 }5};6List listMock = mock(List.class, handler);7listMock.get(0);8listMock.size();9verify(listMock).get(0);10verify(listMock).size();11package org.kodejava.example.mockito;12import org.mockito.invocation.Invocation;13import org.mockito.invocation.MockHandler;14import org.mockito.invocation.MockHandlerFactory;15import java.lang.reflect.Method;16public class InvocationExample {17 public static void main(String[] args) throws Exception {18 MockHandler handler = new MockHandler() {19 public Object handle(Invocation invocation) throws Throwable {20 Object mock = invocation.getMock();21 Method method = invocation.getMethod();

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1import static org.junit.Assert.assertEquals;2import static org.mockito.Mockito.mock;3import static org.mockito.Mockito.when;4import org.junit.Test;5import org.mockito.invocation.InvocationOnMock;6import org.mockito.stubbing.Answer;7public class TestClass {8 public static class ClassUnderTest {9 public int methodToBeMocked(int i) {10 return i * 2;11 }12 }13 public void test() {14 ClassUnderTest classUnderTest = mock(ClassUnderTest.class);15 when(classUnderTest.methodToBeMocked(1)).thenAnswer(new Answer<Integer>() {16 public Integer answer(InvocationOnMock invocation) throws Throwable {17 return (Integer) invocation.getArguments()[0] * 3;18 }19 });20 assertEquals(3, classUnderTest.methodToBeMocked(1));21 }22}23org.junit.Assert.assertEquals(Assert.java:115)24org.junit.Assert.assertEquals(Assert.java:144)25org.junit.Assert.assertEquals(Assert.java:151)26com.javacodegeeks.mockito.MockitoAnswerTest.test(MockitoAnswerTest.java:31)27sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)28sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)29sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)30java.lang.reflect.Method.invoke(Method.java:498)31org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)32org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)33org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)34org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)35org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)36org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)37org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)38org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)39org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)40org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)41org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)42org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)43org.junit.runners.ParentRunner.run(P

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WebApplicationContext doesn&#39;t autowire

If we assume that your job runs in such a small intervals that you really want your test to wait for job to be executed and you just want to test if job is invoked you can use following solution:

Add Awaitility to classpath:

<dependency>
    <groupId>org.awaitility</groupId>
    <artifactId>awaitility</artifactId>
    <version>3.1.0</version>
    <scope>test</scope>
</dependency>

Write test similar to:

@RunWith(SpringRunner.class)
@SpringBootTest
public class DemoApplicationTests {

    @SpyBean
    private MyTask myTask;

    @Test
    public void jobRuns() {
        await().atMost(Duration.FIVE_SECONDS)
               .untilAsserted(() -> verify(myTask, times(1)).work());
    }
}
https://stackoverflow.com/questions/32319640/how-to-test-spring-scheduled

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