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Mockito 可以确保是否使用 reequired 参数调用模拟方法。它是使用verify ()方法完成的。查看下面的代码段。
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
//verify call to calcService is made or not with same arguments.
verify(calcService).add(10.0, 20.0);
步骤1−创建一个称为 CalculatorService 的接口, 以提供数学函数
文件: CalculatorService. java
/**
* 计算相关服务
*/
public interface CalculatorService {
/**
* 加法
*
* @param input1
* @param input2
* @return
*/
public double add(double input1, double input2);
/**
* 减法
*
* @param input1
* @param input2
* @return
*/
public double subtract(double input1, double input2);
/**
* 乘法
*
* @param input1
* @param input2
* @return
*/
public double multiply(double input1, double input2);
/**
* 除法
*
* @param input1
* @param input2
* @return
*/
public double divide(double input1, double input2);
}
步骤2−创建一个 JAVA 类来表示 MathApplication
文件: MathApplication. java
/**
* 数学应用
*/
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);
}
}
步骤3−测试 MathApplication 类
让我们测试 MathApplication 类, 通过注入一个 calculatorService 的Mock。Mock将由 Mockito 创建。
文件: MathApplicationTester. java
import org.junit.Assert;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.InjectMocks;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
// @RunWith attaches a runner with the test class to initialize the test data
@RunWith(MockitoJUnitRunner.class)
public class MathApplicationTester {
//@InjectMocks annotation is used to create and inject the mock object
@InjectMocks
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
when(calcService.add(10.0, 20.0)).thenReturn(30.00);
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0), 30.0, 0);
//verify the behavior
verify(calcService).add(10.0, 20.0);
}
}
步骤4−执行测试用例
在C: \ > Mockito_WORKSPACE中创建名为 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TestRunner查看结果
C:\Mockito_WORKSPACE>java TestRunner
验证输出。
true
步骤1−创建接口 CalculatorService 提供数学函数
文件: CalculatorService. java
publicinterfaceCalculatorService{publicdoubleadd(doubleinput1,doubleinput2);publicdoublesubtract(doubleinput1,doubleinput2);publicdoublemultiply(doubleinput1,doubleinput2);publicdoubledivide(doubleinput1,doubleinput2);}
步骤2−创建一个 JAVA 类来表示 MathApplication
文件: MathApplication. java
publicclassMathApplication{privateCalculatorServicecalcService;publicvoidsetCalculatorService(CalculatorServicecalcService){this.calcService =calcService;}publicdoubleadd(doubleinput1,doubleinput2){//return calcService.add(input1, input2);returninput1 +input2;}publicdoublesubtract(doubleinput1,doubleinput2){returncalcService.subtract(input1,input2);}publicdoublemultiply(doubleinput1,doubleinput2){returncalcService.multiply(input1,input2);}publicdoubledivide(doubleinput1,doubleinput2){returncalcService.divide(input1,input2);}}
步骤3−测试 MathApplication 类
让我们测试 MathApplication 类, 通过注入一个 calculatorService 的Mock。Mock将由 Mockito 创建。
文件: MathApplicationTester. java
importstaticorg.mockito.Mockito.verify;importstaticorg.mockito.Mockito.when;importorg.junit.Assert;importorg.junit.Test;importorg.junit.runner.RunWith;importorg.mockito.InjectMocks;importorg.mockito.Mock;importorg.mockito.runners.MockitoJUnitRunner;// @RunWith attaches a runner with the test class to initialize the test data@RunWith(MockitoJUnitRunner.class)publicclassMathApplicationTester{//@InjectMocks annotation is used to create and inject the mock object@InjectMocksMathApplicationmathApplication =newMathApplication();//@Mock annotation is used to create the mock object to be injected@MockCalculatorServicecalcService;@TestpublicvoidtestAdd(){//add the behavior of calc service to add two numberswhen(calcService.add(10.0,20.0)).thenReturn(30.00);//test the add functionalityAssert.assertEquals(mathApplication.add(10.0,20.0),30.0,0);//verify the behaviorverify(calcService).add(20.0,30.0);}}
步骤4−执行测试用例
在C: \ > Mockito_WORKSPACE中创建名为 TestRunner 的 java 类文件以执行测试用例。
文件: TestRunner. java
importorg.junit.runner.JUnitCore;importorg.junit.runner.Result;importorg.junit.runner.notification.Failure;publicclassTestRunner{publicstaticvoidmain(String[]args){Resultresult =JUnitCore.runClasses(MathApplicationTester.class);for(Failurefailure :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TestRunner以查看结果−
C:\Mockito_WORKSPACE>java TestRunner
验证输出。
testAdd(MathApplicationTester):
Argument(s) are different! Wanted:
calcService.add(20.0, 30.0);
-> at MathApplicationTester.testAdd(MathApplicationTester.java:32)
Actual invocation has different arguments:
calcService.add(10.0, 20.0);
-> at MathApplication.add(MathApplication.java:10)
false
翻译自:https://www.tutorialspoint.com/mockito/mockito_verifying_behavior.htm
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原文链接 : https://chenjianfei.blog.csdn.net/article/details/79546617
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