EasyMock - createStrictMock
EasyMock.createStrictMock () crea un mock e si prende cura anche dell'ordine delle chiamate ai metodi che il mock farà a tempo debito della sua azione.
Sintassi
calcService = EasyMock.createStrictMock(CalculatorService.class);
Esempio
Step 1: Create an interface called CalculatorService to provide mathematical functions
File: 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
File: 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
Testiamo la classe MathApplication, inserendovi una simulazione di calculatorService. Mock sarà creato da EasyMock.
Qui abbiamo aggiunto due chiamate al metodo mock, add () e subtract (), all'oggetto mock tramite wait (). Tuttavia, durante i test, abbiamo chiamato subtract () prima di chiamare add (). Quando creiamo un oggetto fittizio utilizzando EasyMock.createStrictMock (), l'ordine di esecuzione del metodo è importante.
File: MathApplicationTester.java
import org.easymock.EasyMock;
import org.easymock.EasyMockRunner;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
@RunWith(EasyMockRunner.class)
public class MathApplicationTester {
private MathApplication mathApplication;
private CalculatorService calcService;
@Before
public void setUp(){
mathApplication = new MathApplication();
calcService = EasyMock.createStrictMock(CalculatorService.class);
mathApplication.setCalculatorService(calcService);
}
@Test
public void testAddAndSubtract(){
//add the behavior to add numbers
EasyMock.expect(calcService.add(20.0,10.0)).andReturn(30.0);
//subtract the behavior to subtract numbers
EasyMock.expect(calcService.subtract(20.0,10.0)).andReturn(10.0);
//activate the mock
EasyMock.replay(calcService);
//test the subtract functionality
Assert.assertEquals(mathApplication.subtract(20.0, 10.0),10.0,0);
//test the add functionality
Assert.assertEquals(mathApplication.add(20.0, 10.0),30.0,0);
//verify call to calcService is made or not
EasyMock.verify(calcService);
}
}
Step 4: Execute test cases
Crea un file di classe java denominato TestRunner in C:\> EasyMock_WORKSPACE per eseguire uno o più casi di test.
File: 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
Compila le classi usando javac compilatore come segue:
C:\EasyMock_WORKSPACE>javac MathApplicationTester.java
Ora esegui il Test Runner per vedere il risultato:
C:\EasyMock_WORKSPACE>java TestRunner
Verifica l'output.
testAddAndSubtract(com.tutorialspoint.mock.MathApplicationTester):
Unexpected method call CalculatorService.subtract(20.0, 10.0):
CalculatorService.add(20.0, 10.0): expected: 1, actual: 0
false