/*
* Copyright 2008 the original author or authors.
*
* 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 powermock.examples;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import powermock.examples.dependencymanagement.DependencyManager;
import powermock.examples.domain.Person;
import powermock.examples.service.MyService;
import powermock.examples.service.impl.MyServiceImpl;
import java.util.HashSet;
import java.util.Set;
import static org.easymock.EasyMock.expect;
import static org.junit.Assert.assertEquals;
import static org.powermock.api.easymock.PowerMock.*;
/**
* This is an example unit test using JUnit 4.4 for the
* {@link MyServiceImpl#getAllPersons()} method. The task for PowerMock is to
* mock the call to {@link DependencyManager#getInstance()} which is not
* possible without byte-code manipulation.
*/
@RunWith(PowerMockRunner.class)
@PrepareForTest(DependencyManager.class)
public class MyServiceUserTest {
private MyServiceUser tested;
private DependencyManager dependencyManagerMock;
private MyService myServiceMock;
@Before
public void setUp() {
tested = new MyServiceUser();
dependencyManagerMock = createMock(DependencyManager.class);
myServiceMock = createMock(MyService.class);
}
@After
public void tearDown() {
tested = null;
dependencyManagerMock = null;
}
public void replayAll() throws Exception {
replay(DependencyManager.class, dependencyManagerMock, myServiceMock);
}
public void verifyAll() {
verify(DependencyManager.class, dependencyManagerMock, myServiceMock);
}
/**
* Unit test for the {@link MyServiceImpl#getAllPersons()} method. This
* tests demonstrate how to mock the static call to
* {@link DependencyManager#getInstance()} and returning a mock of the
* <code>DependencyManager</code> instead of the real instance.
*/
@Test
public void testGetNumberOfPersons() throws Exception {
/*
* This is how to tell PowerMock to prepare the DependencyManager class
* for static mocking.
*/
mockStatic(DependencyManager.class);
/*
* Expectations are performed the same for static methods as for
* instance methods.
*/
expect(DependencyManager.getInstance()).andReturn(dependencyManagerMock);
expect(dependencyManagerMock.getMyService()).andReturn(myServiceMock);
Set<Person> persons = new HashSet<Person>();
persons.add(new Person("Johan", "Haleby", "MockStreet"));
persons.add(new Person("Jan", "Kronquist", "MockStreet2"));
expect(myServiceMock.getAllPersons()).andReturn(persons);
replayAll();
int numberOfPersons = tested.getNumberOfPersons();
verifyAll();
assertEquals(2, numberOfPersons);
}
}