📅  最后修改于: 2020-12-06 10:15:54             🧑  作者: Mango
Mockito提供了Inorder类,该类负责模拟操作在适当时候进行的方法调用的顺序。
//create an inOrder verifier for a single mock
InOrder inOrder = inOrder(calcService);
//following will make sure that add is first called then subtract is called.
inOrder.verify(calcService).add(20.0,10.0);
inOrder.verify(calcService).subtract(20.0,10.0);
步骤1-创建一个名为CalculatorService的接口以提供数学函数
文件: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);
}
第2步-创建一个JAVA类来表示MathApplication
文件: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);
}
}
第3步-测试MathApplication类
让我们通过向其注入一个CalculatorService模拟来测试MathApplication类。模拟将由Mockito创建。
在这里,我们通过when()向模拟对象添加了两个模拟方法调用add()和减去()。但是,在测试过程中,我们在调用add()之前先调用了减去()。当我们使用Mockito创建模拟对象时,方法的执行顺序无关紧要。使用InOrder类,我们可以确保调用顺序。
文件:MathApplicationTester.java
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import static org.mockito.Mockito.inOrder;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InOrder;
import org.mockito.runners.MockitoJUnitRunner;
// @RunWith attaches a runner with the test class to initialize the test data
@RunWith(MockitoJUnitRunner.class)
public class MathApplicationTester {
private MathApplication mathApplication;
private CalculatorService calcService;
@Before
public void setUp(){
mathApplication = new MathApplication();
calcService = mock(CalculatorService.class);
mathApplication.setCalculatorService(calcService);
}
@Test
public void testAddAndSubtract(){
//add the behavior to add numbers
when(calcService.add(20.0,10.0)).thenReturn(30.0);
//subtract the behavior to subtract numbers
when(calcService.subtract(20.0,10.0)).thenReturn(10.0);
//test the add functionality
Assert.assertEquals(mathApplication.add(20.0, 10.0),30.0,0);
//test the subtract functionality
Assert.assertEquals(mathApplication.subtract(20.0, 10.0),10.0,0);
//create an inOrder verifier for a single mock
InOrder inOrder = inOrder(calcService);
//following will make sure that add is first called then subtract is called.
inOrder.verify(calcService).subtract(20.0,10.0);
inOrder.verify(calcService).add(20.0,10.0);
}
}
步骤4-执行测试用例
在C:\> Mockito_WORKSPACE中创建一个名为TestRunner的Java类文件以执行测试用例。
文件: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());
}
}
步骤5-验证结果
使用javac编译器编译类,如下所示:
C:\Mockito_WORKSPACE>javac CalculatorService.java MathApplication.
java MathApplicationTester.java TestRunner.java
现在运行测试运行器以查看结果-
C:\Mockito_WORKSPACE>java TestRunner
验证输出。
testAddAndSubtract(MathApplicationTester):
Verification in order failure
Wanted but not invoked:
calculatorService.add(20.0, 10.0);
-> at MathApplicationTester.testAddAndSubtract(MathApplicationTester.java:48)
Wanted anywhere AFTER following interaction:
calculatorService.subtract(20.0, 10.0);
-> at MathApplication.subtract(MathApplication.java:13)
false