📅  最后修改于: 2020-11-18 09:13:45             🧑  作者: Mango
EasyMock对可以使用特定方法进行的调用数量进行特殊检查。假设MathApplication应该只调用一次CalculatorService.serviceUsed()方法,然后它不能多次调用CalculatorService.serviceUsed()。
//add the behavior of calc service to add two numbers and serviceUsed.
EasyMock.expect(calcService.add(10.0,20.0)).andReturn(30.00);
calcService.serviceUsed();
//limit the method call to 1, no less and no more calls are allowed
EasyMock.expectLastCall().times(1);
创建如下的CalculatorService接口。
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);
public void serviceUsed();
}
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);
public void serviceUsed();
}
步骤2: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){
calcService.serviceUsed();
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
让我们通过向其注入一个CalculatorService模拟来测试MathApplication类。模拟将由EasyMock创建。
文件: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);
calcService.serviceUsed();
EasyMock.expectLastCall().times(1);
//activate the mock
EasyMock.replay(calcService);
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
//verify call to calcService is made or not
EasyMock.verify(calcService);
}
}
步骤4:执行测试用例
在C:\> EasyMock_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:\EasyMock_WORKSPACE>javac Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
现在运行测试运行器以查看结果:
C:\EasyMock_WORKSPACE>java TestRunner
验证输出。
true
步骤1:创建一个接口CalculatorService来提供数学函数。
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);
public void serviceUsed();
}
步骤2: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){
calcService.serviceUsed();
calcService.serviceUsed();
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
让我们通过向其注入一个CalculatorService模拟来测试MathApplication类。模拟将由EasyMock创建。
文件: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);
calcService.serviceUsed();
EasyMock.expectLastCall().times(1);
//activate the mock
EasyMock.replay(calcService);
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
//verify call to calcService is made or not
EasyMock.verify(calcService);
}
}
步骤4:执行测试用例<
在C:\> EasyMock_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:\EasyMock_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:\EasyMock_WORKSPACE>java TestRunner
验证输出。
testAdd(com.tutorialspoint.mock.MathApplicationTester):
Unexpected method call CalculatorService.serviceUsed():
CalculatorService.add(10.0, 20.0): expected: 1, actual: 0
CalculatorService.serviceUsed(): expected: 1, actual: 2
false
步骤1:创建一个接口计算器服务以提供数学函数
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);
public void serviceUsed();
}
步骤2: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);
}
}
步骤3: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EasyMock创建。
文件: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);
calcService.serviceUsed();
EasyMock.expectLastCall().times(1);
//activate the mock
EasyMock.replay(calcService);
//test the add functionality
Assert.assertEquals(mathApplication.add(10.0, 20.0),30.0,0);
//verify call to calcService is made or not
EasyMock.verify(calcService);
}
}
步骤4:执行测试用例
在C:\> EasyMock_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:\EasyMock_WORKSPACE>javac Calculator Service.java Math Application.java Math Application Tester.java Test Runner.java
现在运行测试运行器以查看结果:
C:\EasyMock_WORKSPACE>java TestRunner
验证输出。
testAdd(com.tutorialspoint.mock.MathApplicationTester):
Expectation failure on verify:
CalculatorService.serviceUsed(): expected: 1, actual: 0
false