Below we have a Student class with Private Class Variable(id and name), Service and Private Methods.<\/p>\n
Student.java<\/strong><\/p>\n Mocking a Private Field<\/strong> StudentTest.java<\/strong><\/p>\n Mocking a Private Method<\/strong> Mocking a Private Dependencies<\/strong> Below we have a Student class with Private Class Variable(id and name), Service and Private Methods. Student.java public class Student { private Integer id; private String name; @Autowired private StudentService studentService; private String getStudentDetails(){ return "id: " + getId() + "; name: " + getName(); } } Mocking a Private Field we cannot access the… Continue reading \r\npublic class Student {\r\n private Integer id;\r\n private String name;\r\n\r\n @Autowired\r\n private StudentService studentService;\r\n\r\n private String getStudentDetails(){\r\n return "id: " + getId() + "; name: " + getName();\r\n } \r\n}\r\n<\/pre>\n
\nwe cannot access the private field id to assign a value for testing, because there isn’t a public setter method<\/strong> for it.
\nWe can then use ReflectionTestUtils.setField method to assign a value to the private member id<\/p>\n\r\n@Test\r\npublic void setValueWithNoSetter() {\r\n Student student = new Student();\r\n ReflectionTestUtils.setField(student, "id", 101); \r\n assertTrue(student.getId().equals(101));\r\n}\r\n<\/pre>\n
\nIn a similar way we can invoke private method – getStudentDetails() as below in student class
\nStudentTest.java<\/strong><\/p>\n\r\n@Test\r\npublic void whenNonPublicMethod_thenReflectionTestUtilsInvokeMethod() {\r\n Student student= new Student ();\r\n ReflectionTestUtils.setField(student, "id", 101);\r\n ReflectionTestUtils.setField(student, "name", "Mugil");\r\n \r\n assertTrue(ReflectionTestUtils.invokeMethod(student, "employeeToString").equals\r\n ("id: 101; name: Mugil"));\r\n}\r\n<\/pre>\n
\nStudentTest.java<\/strong><\/p>\n\r\n@Test\r\npublic void whenNonPublicMethod_thenReflectionTestUtilsInvokeMethod() \r\n{\r\n Student student = new Student();\r\n StudentService studService = mock(StudentService.class);\r\n when(studService.getStudentStatus(student.getId())).thenReturn("Active");\r\n\r\n ReflectionTestUtils.setField(student, "studentService", studService);\r\n\r\n.\r\n.\r\n}\r\n<\/pre>\n","protected":false},"excerpt":{"rendered":"