EasyMock - Ajout de comportement
EasyMock ajoute une fonctionnalité à un objet simulé à l'aide des méthodes expect() et expectLassCall(). Jetez un œil à l'extrait de code suivant.
//add the behavior of calc service to add two numbers
EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
Ici, nous avons demandé à EasyMock de donner un comportement d'ajout de 10 et 20 à la méthode add de calcService et, par conséquent, de renvoyer la valeur de 30,00.
À ce stade, Mock a simplement enregistré le comportement mais il ne fonctionne pas comme un objet factice. Après avoir appelé replay, cela fonctionne comme prévu.
//add the behavior of calc service to add two numbers
EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
//activate the mock
//EasyMock.replay(calcService);
Exemple sans EasyMock.Replay ()
Step 1: Create an interface called CalculatorService to provide mathematical functions
Fichier: CalculatorService.java
public interface CalculatorService {
public double add(double input1, double input2);
public double subtract(double input1, double input2);
public double multiply(double input1, double input2);
public double divide(double input1, double input2);
}
Step 2: Create a JAVA class to represent MathApplication
Fichier: MathApplication.java
public class MathApplication {
private CalculatorService calcService;
public void setCalculatorService(CalculatorService calcService){
this.calcService = calcService;
}
public double add(double input1, double input2){
return calcService.add(input1, input2);
}
public double subtract(double input1, double input2){
return calcService.subtract(input1, input2);
}
public double multiply(double input1, double input2){
return calcService.multiply(input1, input2);
}
public double divide(double input1, double input2){
return calcService.divide(input1, input2);
}
}
Step 3: Test the MathApplication class
Testons la classe MathApplication, en y injectant un simulacre de calculatorService. Mock sera créé par EasyMock.
Fichier: MathApplicationTester.java
import org.easymock.EasyMock;
import org.easymock.EasyMockRunner;
import org.easymock.Mock;
import org.easymock.TestSubject;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
//@RunWith attaches a runner with the test class to initialize the test data
@RunWith(EasyMockRunner.class)
public class MathApplicationTester {
// @TestSubject annotation is used to identify the class which is going to use the mock object
@TestSubject
MathApplication mathApplication = new MathApplication();
//@Mock annotation is used to create the mock object to be injected
@Mock
CalculatorService calcService;
@Test
public void testAdd(){
//add the behavior of calc service to add two numbers
EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
//activate the mock
//EasyMock.replay(calcService);
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
}
}
Step 4: Execute test cases
Créez un fichier de classe Java nommé TestRunner dans C:\>EasyMock_WORKSPACE pour exécuter le ou les cas de test.
Fichier: TestRunner.java
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;
public class TestRunner {
public static void main(String[] args) {
Result result = JUnitCore.runClasses(MathApplicationTester.class);
for (Failure failure : result.getFailures()) {
System.out.println(failure.toString());
}
System.out.println(result.wasSuccessful());
}
}
Step 5: Verify the Result
Compilez les classes en utilisant javac compilateur comme suit:
C:\EasyMock_WORKSPACE>javac Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
Maintenant, exécutez le Test Runner pour voir le résultat:
C:\EasyMock_WORKSPACE>java TestRunner
Vérifiez la sortie.
testAdd(MathApplicationTester): expected:<0.0> but was:<30.0>
false
Exemple avec EasyMock.Replay ()
Step 1: Create an interface called CalculatorService to provide mathematical functions.
Fichier: CalculatorService.java
public interface CalculatorService {
public double add(double input1, double input2);
public double subtract(double input1, double input2);
public double multiply(double input1, double input2);
public double divide(double input1, double input2);
}
Step 2: Create a JAVA class to represent MathApplication.
Fichier: MathApplication.java
public class MathApplication {
private CalculatorService calcService;
public void setCalculatorService(CalculatorService calcService){
this.calcService = calcService;
}
public double add(double input1, double input2){
return calcService.add(input1, input2);
}
public double subtract(double input1, double input2){
return calcService.subtract(input1, input2);
}
public double multiply(double input1, double input2){
return calcService.multiply(input1, input2);
}
public double divide(double input1, double input2){
return calcService.divide(input1, input2);
}
}
Step 3: Test the MathApplication class
Testons la classe MathApplication, en y injectant un simulacre de calculatorService. Mock sera créé par EasyMock.
Fichier: MathApplicationTester.java
import org.easymock.EasyMock;
import org.easymock.EasyMockRunner;
import org.easymock.Mock;
import org.easymock.TestSubject;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
// @RunWith attaches a runner with the test class to initialize the test data
@RunWith(EasyMockRunner.class)
public class MathApplicationTester {
// @TestSubject annotation is used to identify class which is going to use the mock object
@TestSubject
MathApplication mathApplication = new MathApplication();
// @Mock annotation is used to create the mock object to be injected
@Mock
CalculatorService calcService;
@Test
public void testAdd(){
// add the behavior of calc service to add two numbers
EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
//activate the mock
EasyMock.replay(calcService);
// test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
}
}
Step 4: Execute test cases
Créez un fichier de classe Java nommé TestRunner dans C:\>EasyMock_WORKSPACE pour exécuter des cas de test.
Fichier: TestRunner.java
import org.junit.runner.JUnitCore;
import org.junit.runner.Result;
import org.junit.runner.notification.Failure;
public class TestRunner {
public static void main(String[] args) {
Result result = JUnitCore.runClasses(MathApplicationTester.class);
for (Failure failure : result.getFailures()) {
System.out.println(failure.toString());
}
System.out.println(result.wasSuccessful());
}
}
Step 5: Verify the Result
Compilez les classes en utilisant javac compilateur comme suit:
C:\EasyMock_WORKSPACE>javac Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
Exécutez maintenant le Test Runner pour voir le résultat.
C:\EasyMock_WORKSPACE>java TestRunner
Vérifiez la sortie.
true