练习和实验：面向对象技术的类状态测试

练习和实验：面向对象技术的类状态测试一. 下图是选课系统中的课程（course）类的状态图，根据下图完成1. 给出类course的定义，包括属性和方法。2. 例出所有需要测试的类状态3. 列出所有需要测试状态的事件和转换4. 从课程开始状态，到没有分配老师的状态，然后触发事件addProfessor到分配老师的状态，然后学生选课人数达到10人到满员的状态，最后触发closeRegistration事件到提交状态。请为这个状态场景的测试，开发一个测试驱动类，要编写出伪码。1 Course类定义Class course Studentnumber integer professor string issubmit boolean NewCourse() AddProfessor() RemoveProfessor() AddStudent() RemoveStudent() Close() CloseRegistration() Cancel() Getprofessor() Getstudentnum() Getissubmit()2 类的测试状态Unassigned, Assigned, Full, Cancel, Committed3 测试状态的事件和转换状态A事件和转换状态BUnassignedAddProfessor()AssignedRemoveProfessor()UnassignedAddStudent()FullUnassignedClose()CancelCloseRegistration()Cancel()AssignedAddStudent()FullAssignedClose()CancelCancel()AssignedClose()committedCloseRegistration()fullClose()committedCloseRegistration()fullCancel()cancel4 状态场景的测试类class testscenarioStudentNumProfessorIsSubmitstep1OKBooleanstep2OKBooleanstep3OKBooleanstep4OKBooleanmain()testcase= instantiate newcourse()testcase.addprofessor(“zhangshan”)professor=testcase.getprofessor()if professor=”zhangshan” thenstep1OK=trueelsestep1OK=falseend iffor (I=1;10;I+)testcase.addstudent()studentnum=testcase.getstudentnum()if studentnum =10 thenstep2OK=trueelsestep2OK=falseend iftestcase.close()issubmit=test.getissubmit()if issubmit=True thenstep3OK=trueelsestep3OK=falseend ifif step1OK =true an