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Test utilities for the UIBuilder Framework

There is a newer version: 3.0.3

/*
 *
 * Copyright © 2018 Webvalto Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.devbench.uibuilder.test.extensions;

import org.junit.jupiter.api.extension.ExtensionContext;
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.Mockito;
import org.mockito.MockitoAnnotations;

import java.lang.reflect.Parameter;


public class MockitoExtension implements TestInstancePostProcessor, ParameterResolver {

    @Override
    public void postProcessTestInstance(Object testInstance, ExtensionContext context) {
        MockitoAnnotations.initMocks(testInstance);
    }

    @Override
    public boolean supportsParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
        return parameterContext.getParameter().isAnnotationPresent(Mock.class);
    }

    @Override
    public Object resolveParameter(ParameterContext parameterContext, ExtensionContext extensionContext) {
        return getMock(parameterContext.getParameter(), extensionContext);
    }

    private Object getMock(Parameter parameter, ExtensionContext extensionContext) {
        Class mockType = parameter.getType();
        ExtensionContext.Store mocks = extensionContext.getStore(ExtensionContext.Namespace.create(MockitoExtension.class, mockType));
        String mockName = getMockName(parameter);

        if (mockName != null) {
            return mocks.getOrComputeIfAbsent(mockName, key -> Mockito.mock(mockType, mockName));
        }
        else {
            return mocks.getOrComputeIfAbsent(mockType.getCanonicalName(), key -> Mockito.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;
    }

}