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Add mock-comparisons module (#453)

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* Add new module for mocks comparison.

* Add sources for testing.

* Changes on testCase.

* Enter some tests for mockito.

* More tests for Mockito.

* Even more tests.

* Add the rest of the mocking libraries.

* Javadoc on test.

* Test bare bones for EasyMock.

* Fist kind of test and setup.

* Add tests using EasyMock with a change on LoginService.

* Create LoginControllerTest.java

* Test setup

* [JMockit] No method called test.

* [JMockit] Two methods called test.

* [JMockit] One method called test.

* [JMockit] Exception mock test

* [JMockit] Mocked object to pass around test.

* [JMockit] Custom matcher test.

* [JMockit] Partial mocking test.

* [JMockit] Fix with IDE.

* Not stubs. Mocks. MOCKS!!!

* Remove unnecesary import.
This commit is contained in:
Álvaro Fernández González 2016-06-18 19:22:30 +02:00 committed by Grzegorz Piwowarek
parent b9ddf5f8be
commit 9a915901af
10 changed files with 623 additions and 0 deletions
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7
mock-comparisons/README.md Normal file
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=========
## Mock comparison realated tutorials
### Relevant Articles:
- [Mockito vs EasyMock vs JMockit](http://www.baeldung.com/mockito-vs-easymock-vs-jmockit)

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mock-comparisons/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>org.baeldung</groupId>
<artifactId>mock-comparisons</artifactId>
<version>0.1-SNAPSHOT</version>
<name>mockito</name>
<dependencies>
<!-- utils -->
<!-- web -->
<!-- test scoped -->
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>${junit.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.mockito</groupId>
<artifactId>mockito-core</artifactId>
<version>${mockito.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>${easymock.version}</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jmockit</groupId>
<artifactId>jmockit</artifactId>
<version>${jmockit.version}</version>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<finalName>mock-comparisons</finalName>
<resources>
<resource>
<directory>src/main/resources</directory>
<filtering>true</filtering>
</resource>
</resources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-surefire-plugin</artifactId>
<version>${maven-surefire-plugin.version}</version>
</plugin>
</plugins>
</build>
<properties>
<!-- Spring -->
<!-- persistence -->
<!-- logging -->
<!-- various -->
<!-- util -->
<!-- testing -->
<junit.version>4.12</junit.version>
<mockito.version>1.10.19</mockito.version>
<easymock.version>3.4</easymock.version>
<jmockit.version>1.24</jmockit.version>
<!-- maven plugins -->
<maven-compiler-plugin.version>3.3</maven-compiler-plugin.version>
<maven-war-plugin.version>2.6</maven-war-plugin.version>
<maven-surefire-plugin.version>2.18.1</maven-surefire-plugin.version>
<maven-resources-plugin.version>2.7</maven-resources-plugin.version>
<cargo-maven2-plugin.version>1.4.14</cargo-maven2-plugin.version>
</properties>
</project>

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mock-comparisons/src/main/java/org/baeldung/mocks/testCase/LoginController.java Normal file
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package org.baeldung.mocks.testCase;
public class LoginController {
public LoginService loginService;
public String login(UserForm userForm){
if(null == userForm){
return "ERROR";
}else{
boolean logged;
try {
logged = loginService.login(userForm);
} catch (Exception e) {
return "ERROR";
}
if(logged){
loginService.setCurrentUser(userForm.getUsername());
return "OK";
}else{
return "KO";
}
}
}
// standard setters and getters
}

9
mock-comparisons/src/main/java/org/baeldung/mocks/testCase/LoginDao.java Normal file
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package org.baeldung.mocks.testCase;
public class LoginDao {
public int login(UserForm userForm){
//actual call to a third party library
return 0;
}
}

33
mock-comparisons/src/main/java/org/baeldung/mocks/testCase/LoginService.java Normal file
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package org.baeldung.mocks.testCase;
public class LoginService {
private LoginDao loginDao;
private String currentUser;
public boolean login(UserForm userForm) {
assert null != userForm;
int loginResults = loginDao.login(userForm);
switch (loginResults){
case 1:
return true;
default:
return false;
}
}
public void setCurrentUser(String username) {
if(null != username){
this.currentUser = username;
}
}
public void setLoginDao(LoginDao loginDao) {
this.loginDao = loginDao;
}
// standard setters and getters
}

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mock-comparisons/src/main/java/org/baeldung/mocks/testCase/UserForm.java Normal file
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package org.baeldung.mocks.testCase;
public class UserForm {
// public access modifiers as only for testing
public String password;
public String username;
public String getUsername(){
return username;
}
}

147
mock-comparisons/src/test/java/org/baeldung/mocks/easymock/LoginControllerTest.java Normal file
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package org.baeldung.mocks.easymock;
import org.baeldung.mocks.testCase.LoginController;
import org.baeldung.mocks.testCase.LoginDao;
import org.baeldung.mocks.testCase.LoginService;
import org.baeldung.mocks.testCase.UserForm;
import org.easymock.*;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
/**
* <p>Test for LoginController using EasyMock.</p>
* Created by Alvaro on 12/06/2016.
*/
@RunWith(EasyMockRunner.class)
public class LoginControllerTest {
@Mock
private LoginDao loginDao;
@Mock
private LoginService loginService;
@TestSubject
private LoginController loginController = new LoginController();
@Test
public void assertThatNoMethodHasBeenCalled() {
EasyMock.replay(loginService);
loginController.login(null);
// no method called
EasyMock.verify(loginService);
}
@Test
public void assertTwoMethodsHaveBeenCalled() {
UserForm userForm = new UserForm();
userForm.username = "foo";
EasyMock.expect(loginService.login(userForm)).andReturn(true);
loginService.setCurrentUser("foo");
EasyMock.replay(loginService);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
EasyMock.verify(loginService);
}
@Test
public void assertOnlyOneMethodHasBeenCalled() {
UserForm userForm = new UserForm();
userForm.username = "foo";
EasyMock.expect(loginService.login(userForm)).andReturn(false);
EasyMock.replay(loginService);
String login = loginController.login(userForm);
Assert.assertEquals("KO", login);
EasyMock.verify(loginService);
}
@Test
public void mockExceptionThrowing() {
UserForm userForm = new UserForm();
EasyMock.expect(loginService.login(userForm)).andThrow(new IllegalArgumentException());
EasyMock.replay(loginService);
String login = loginController.login(userForm);
Assert.assertEquals("ERROR", login);
EasyMock.verify(loginService);
}
@Test
public void mockAnObjectToPassAround() {
UserForm userForm = EasyMock.mock(UserForm.class);
EasyMock.expect(userForm.getUsername()).andReturn("foo");
EasyMock.expect(loginService.login(userForm)).andReturn(true);
loginService.setCurrentUser("foo");
EasyMock.replay(userForm);
EasyMock.replay(loginService);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
EasyMock.verify(userForm);
EasyMock.verify(loginService);
}
@Test
public void argumentMatching() {
UserForm userForm = new UserForm();
userForm.username = "foo";
// default matcher
EasyMock.expect(loginService.login(EasyMock.isA(UserForm.class))).andReturn(true);
// complex matcher
loginService.setCurrentUser(specificArgumentMatching("foo"));
EasyMock.replay(loginService);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
EasyMock.verify(loginService);
}
private static String specificArgumentMatching(final String expected) {
EasyMock.reportMatcher(new IArgumentMatcher() {
@Override
public boolean matches(Object argument) {
return argument instanceof String && ((String) argument).startsWith(expected);
}
@Override
public void appendTo(StringBuffer buffer) {
//NOOP
}
});
return null;
}
@Test
public void partialMocking() {
UserForm userForm = new UserForm();
userForm.username = "foo";
// use partial mock
LoginService loginServicePartial = EasyMock.partialMockBuilder(LoginService.class).
addMockedMethod("setCurrentUser").createMock();
loginServicePartial.setCurrentUser("foo");
// let service's login use implementation so let's mock DAO call
EasyMock.expect(loginDao.login(userForm)).andReturn(1);
loginServicePartial.setLoginDao(loginDao);
loginController.loginService = loginServicePartial;
EasyMock.replay(loginDao);
EasyMock.replay(loginServicePartial);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
// verify mocked call
EasyMock.verify(loginServicePartial);
EasyMock.verify(loginDao);
}
}

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mock-comparisons/src/test/java/org/baeldung/mocks/jmockit/LoginControllerTest.java Normal file
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package org.baeldung.mocks.jmockit;
import mockit.*;
import mockit.integration.junit4.JMockit;
import org.baeldung.mocks.testCase.LoginController;
import org.baeldung.mocks.testCase.LoginDao;
import org.baeldung.mocks.testCase.LoginService;
import org.baeldung.mocks.testCase.UserForm;
import org.hamcrest.BaseMatcher;
import org.hamcrest.Description;
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
/**
* <p>Test for LoginController using JMockit.</p>
* Created by Alvaro on 12/06/2016.
*/
@RunWith(JMockit.class)
public class LoginControllerTest {
@Injectable
private LoginDao loginDao;
@Injectable
private LoginService loginService;
@Tested
private LoginController loginController;
@Test
public void assertThatNoMethodHasBeenCalled() {
loginController.login(null);
// no method called
new FullVerifications(loginService) {};
}
@Test
public void assertTwoMethodsHaveBeenCalled() {
final UserForm userForm = new UserForm();
userForm.username = "foo";
new Expectations() {{
loginService.login(userForm); result = true;
loginService.setCurrentUser("foo");
}};
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
new FullVerifications(loginService) {};
}
@Test
public void assertOnlyOneMethodHasBeenCalled() {
final UserForm userForm = new UserForm();
userForm.username = "foo";
new Expectations() {{
loginService.login(userForm); result = false;
// no expectation for setCurrentUser
}};
String login = loginController.login(userForm);
Assert.assertEquals("KO", login);
new FullVerifications(loginService) {};
}
@Test
public void mockExceptionThrowing() {
final UserForm userForm = new UserForm();
new Expectations() {{
loginService.login(userForm); result = new IllegalArgumentException();
// no expectation for setCurrentUser
}};
String login = loginController.login(userForm);
Assert.assertEquals("ERROR", login);
new FullVerifications(loginService) {};
}
@Test
public void mockAnObjectToPassAround(@Mocked final UserForm userForm) {
new Expectations() {{
userForm.getUsername(); result = "foo";
loginService.login(userForm); result = true;
loginService.setCurrentUser("foo");
}};
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
new FullVerifications(loginService) {};
new FullVerifications(userForm) {};
}
@Test
public void argumentMatching() {
final UserForm userForm = new UserForm();
userForm.username = "foo";
// default matcher
new Expectations() {{
loginService.login((UserForm) any);
result = true;
// complex matcher
loginService.setCurrentUser(withArgThat(new BaseMatcher<String>() {
@Override
public boolean matches(Object item) {
return item instanceof String && ((String) item).startsWith("foo");
}
@Override
public void describeTo(Description description) {
//NOOP
}
}));
}};
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
new FullVerifications(loginService) {};
}
@Test
public void partialMocking() {
// use partial mock
final LoginService partialLoginService = new LoginService();
partialLoginService.setLoginDao(loginDao);
loginController.loginService = partialLoginService;
final UserForm userForm = new UserForm();
userForm.username = "foo";
// let service's login use implementation so let's mock DAO call
new Expectations() {{
loginDao.login(userForm); result = 1;
// no expectation for loginService.login
partialLoginService.setCurrentUser("foo");
}};
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
// verify mocked call
new FullVerifications(partialLoginService) {};
new FullVerifications(loginDao) {};
}
}

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mock-comparisons/src/test/java/org/baeldung/mocks/mockito/LoginControllerTest.java Normal file
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package org.baeldung.mocks.mockito;
import org.baeldung.mocks.testCase.LoginController;
import org.baeldung.mocks.testCase.LoginDao;
import org.baeldung.mocks.testCase.LoginService;
import org.baeldung.mocks.testCase.UserForm;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.mockito.*;
/**
* <p>Test for LoginController using Mockito.</p>
* Created by Alvaro on 12/06/2016.
*/
public class LoginControllerTest {
@Mock
private LoginDao loginDao;
@Spy
@InjectMocks
private LoginService spiedLoginService;
@Mock
private LoginService loginService;
@InjectMocks
private LoginController loginController;
@Before
public void setUp() {
loginController = new LoginController();
MockitoAnnotations.initMocks(this);
}
@Test
public void assertThatNoMethodHasBeenCalled() {
loginController.login(null);
// no method called
Mockito.verifyZeroInteractions(loginService);
}
@Test
public void assertTwoMethodsHaveBeenCalled() {
UserForm userForm = new UserForm();
userForm.username = "foo";
Mockito.when(loginService.login(userForm)).thenReturn(true);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
Mockito.verify(loginService).login(userForm);
Mockito.verify(loginService).setCurrentUser("foo");
}
@Test
public void assertOnlyOneMethodHasBeenCalled() {
UserForm userForm = new UserForm();
userForm.username = "foo";
Mockito.when(loginService.login(userForm)).thenReturn(false);
String login = loginController.login(userForm);
Assert.assertEquals("KO", login);
Mockito.verify(loginService).login(userForm);
Mockito.verifyNoMoreInteractions(loginService);
}
@Test
public void mockExceptionThrowing() {
UserForm userForm = new UserForm();
Mockito.when(loginService.login(userForm)).thenThrow(IllegalArgumentException.class);
String login = loginController.login(userForm);
Assert.assertEquals("ERROR", login);
Mockito.verify(loginService).login(userForm);
Mockito.verifyZeroInteractions(loginService);
}
@Test
public void mockAnObjectToPassAround() {
UserForm userForm = Mockito.when(Mockito.mock(UserForm.class).getUsername()).thenReturn("foo").getMock();
Mockito.when(loginService.login(userForm)).thenReturn(true);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
Mockito.verify(loginService).login(userForm);
Mockito.verify(loginService).setCurrentUser("foo");
}
@Test
public void argumentMatching() {
UserForm userForm = new UserForm();
userForm.username = "foo";
// default matcher
Mockito.when(loginService.login(Mockito.any(UserForm.class))).thenReturn(true);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
Mockito.verify(loginService).login(userForm);
// complex matcher
Mockito.verify(loginService).setCurrentUser(Mockito.argThat(new ArgumentMatcher<String>() {
@Override
public boolean matches(Object argument) {
return argument instanceof String && ((String) argument).startsWith("foo");
}
}));
}
@Test
public void partialMocking() {
// use partial mock
loginController.loginService = spiedLoginService;
UserForm userForm = new UserForm();
userForm.username = "foo";
// let service's login use implementation so let's mock DAO call
Mockito.when(loginDao.login(userForm)).thenReturn(1);
String login = loginController.login(userForm);
Assert.assertEquals("OK", login);
// verify mocked call
Mockito.verify(spiedLoginService).setCurrentUser("foo");
}
}

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pom.xml
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<module>jooq-spring</module>
<module>json-path</module>
<module>mockito</module>
<module>mock-comparisons</module>
<module>jee7schedule</module>
<!-- <module>jpa-storedprocedure</module> -->
<module>querydsl</module>