createStrictMock( createStrictMock)
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2023-12-01
EasyMock.createStrictMock()创建一个模拟,并且还处理模拟将在其动作的适当过程中进行的方法调用的顺序。
语法 (Syntax)
calcService = EasyMock.createStrictMock(CalculatorService.class);
例子 (Example)
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
让我们通过在其中注入一个模拟的calculatorService来测试MathApplication类。 Mock将由EasyMock创建。
这里我们通过expect()向mock对象添加了两个模拟方法调用add()和subtract()。 但是在测试期间,我们在调用add()之前调用了subtract()。 当我们使用EasyMock.createStrictMock()创建一个模拟对象时,该方法的执行顺序很重要。
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
在C:\》 EasyMock_WORKSPACE创建一个名为TestRunner的java类文件,以执行测试用例。
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
使用javac编译器编译类,如下所示:
C:\EasyMock_WORKSPACE>javac MathApplicationTester.java
现在运行Test Runner来查看结果:
C:\EasyMock_WORKSPACE>java TestRunner
验证输出。
testAddAndSubtract(cn.xnip.mock.MathApplicationTester):
Unexpected method call CalculatorService.subtract(20.0, 10.0):
CalculatorService.add(20.0, 10.0): expected: 1, actual: 0
false