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编写测试(Writing a Tests)

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2023-12-01

在这里,我们将看到一个使用POJO类,业务逻辑类和测试类的JUnit测试的完整示例,它将由测试运行器运行。

在C:\“JUNIT_WORKSPACE中创建EmployeeDetails.java ,这是一个POJO类。

public class EmployeeDetails {
   private String name;
   private double monthlySalary;
   private int age;
   /**
   * @return the name
   */
   public String getName() {
      return name;
   }
   /**
   * @param name the name to set
   */
   public void setName(String name) {
      this.name = name;
   }
   /**
   * @return the monthlySalary
   */
   public double getMonthlySalary() {
      return monthlySalary;
   }
   /**
   * @param monthlySalary the monthlySalary to set
   */
   public void setMonthlySalary(double monthlySalary) {
      this.monthlySalary = monthlySalary;
   }
   /**
   * @return the age
   */
   public int getAge() {
      return age;
   }
   /**
   * @param age the age to set
   */
   public void setAge(int age) {
      this.age = age;
   }
}

EmployeeDetails类用于 -

  • 获取/设置员工姓名的值。
  • 获取/设置员工月薪的值。
  • 获取/设置员工年龄的值。

在C:\“JUNIT_WORKSPACE中创建一个名为EmpBusinessLogic.java的文件,其中包含业务逻辑。

public class EmpBusinessLogic {
   // Calculate the yearly salary of employee
   public double calculateYearlySalary(EmployeeDetails employeeDetails) {
      double yearlySalary = 0;
      yearlySalary = employeeDetails.getMonthlySalary() * 12;
      return yearlySalary;
   }
   // Calculate the appraisal amount of employee
   public double calculateAppraisal(EmployeeDetails employeeDetails) {
      double appraisal = 0;
      if(employeeDetails.getMonthlySalary() < 10000){
         appraisal = 500;
      }else{
         appraisal = 1000;
      }
      return appraisal;
   }
}

EmpBusinessLogic类用于计算 -

  • 员工的年薪。
  • 员工的评估金额。

在C:\“JUNIT_WORKSPACE中创建一个名为TestEmployeeDetails.java的文件,其中包含要测试的测试用例。

import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class TestEmployeeDetails {
   EmpBusinessLogic empBusinessLogic = new EmpBusinessLogic();
   EmployeeDetails employee = new EmployeeDetails();
   //test to check appraisal
   @Test
   public void testCalculateAppriasal() {
      employee.setName("Rajeev");
      employee.setAge(25);
      employee.setMonthlySalary(8000);
      double appraisal = empBusinessLogic.calculateAppraisal(employee);
      assertEquals(500, appraisal, 0.0);
   }
   // test to check yearly salary
   @Test
   public void testCalculateYearlySalary() {
      employee.setName("Rajeev");
      employee.setAge(25);
      employee.setMonthlySalary(8000);
      double salary = empBusinessLogic.calculateYearlySalary(employee);
      assertEquals(96000, salary, 0.0);
   }
}

TestEmployeeDetails类用于测试EmpBusinessLogic类的方法。 它

  • 测试员工的年薪。
  • 测试员工的评估金额。

接下来,在C:\“JUNIT_WORKSPACE中创建一个名为TestRunner.java的java类,以执行测试用例。

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(TestEmployeeDetails.class);
      for (Failure failure : result.getFailures()) {
         System.out.println(failure.toString());
      }
      System.out.println(result.wasSuccessful());
   }
} 

使用javac编译测试用例和Test Runner类。

C:\JUNIT_WORKSPACE>javac EmployeeDetails.java 
EmpBusinessLogic.java TestEmployeeDetails.java TestRunner.java

现在运行Test Runner,它将运行在提供的Test Case类中定义的测试用例。

C:\JUNIT_WORKSPACE>java TestRunner

验证输出。

true