MockitoExtension.java
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package org.legrog.test;
/*
TAKEN FROM JUnit 5 Sample
https://github.com/junit-team/junit5-samples/blob/master/junit5-mockito-extension/src/main/java/com/example/mockito/MockitoExtension.java
*/
/*
* Copyright 2015-2016 the original author or authors.
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution and is available at
*
* http://www.eclipse.org/legal/epl-v10.html
*
*/
import static org.mockito.Mockito.mock;
import java.lang.reflect.Parameter;
import org.junit.jupiter.api.extension.ExtensionContext;
import org.junit.jupiter.api.extension.ExtensionContext.Namespace;
import org.junit.jupiter.api.extension.ExtensionContext.Store;
import org.junit.jupiter.api.extension.ParameterContext;
import org.junit.jupiter.api.extension.ParameterResolver;
import org.junit.jupiter.api.extension.TestInstancePostProcessor;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
/**
* {@code MockitoExtension} showcases the {@link TestInstancePostProcessor}
* and {@link ParameterResolver} extension APIs of JUnit 5 by providing
* dependency injection support at the field level and at the method parameter
* level via Mockito 2.x's {@link Mock @Mock} annotation.
*/
public class MockitoExtension implements TestInstancePostProcessor, ParameterResolver {
@Override
public void postProcessTestInstance(Object testInstance, ExtensionContext context) {
MockitoAnnotations.initMocks(testInstance);
}
@Override
public boolean supports(ParameterContext parameterContext, ExtensionContext extensionContext) {
return parameterContext.getParameter().isAnnotationPresent(Mock.class);
}
@Override
public Object resolve(ParameterContext parameterContext, ExtensionContext extensionContext) {
return getMock(parameterContext.getParameter(), extensionContext);
}
private Object getMock(Parameter parameter, ExtensionContext extensionContext) {
Class<?> mockType = parameter.getType();
Store mocks = extensionContext.getStore(Namespace.create(MockitoExtension.class, mockType));
String mockName = getMockName(parameter);
if (mockName != null) {
return mocks.getOrComputeIfAbsent(mockName, key -> mock(mockType, mockName));
} else {
return mocks.getOrComputeIfAbsent(mockType.getCanonicalName(), key -> mock(mockType));
}
}
private String getMockName(Parameter parameter) {
String explicitMockName = parameter.getAnnotation(Mock.class).name().trim();
if (!explicitMockName.isEmpty()) {
return explicitMockName;
} else if (parameter.isNamePresent()) {
return parameter.getName();
}
return null;
}
}