预期的异常规则和模拟静态方法– JUnit

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@RunWith(PowerMockRunner.class)
@PrepareForTest(ClassWithStaticMethod.class)
public class EmployeeServiceImplTest {
@InjectMocks
private EmployeeServiceImpl employeeServiceImpl;
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Before
public void setupMock() {
MockitoAnnotations.initMocks(this);
}
@Test
public void addEmployeeForNull() throws EmployeeServiceException {
expectedException.expect(EmployeeServiceException.class);
expectedException.expectMessage("Invalid Request");
employeeServiceImpl.addEmployee(null);
}
}

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public class EmployeeServiceImpl implements IEmployeeService {
@Override
public String addEmployee(final Request request)
throws EmployeeServiceException {
if (request == null) {
throw new EmployeeServiceException("Invalid Request");
}
return null;
}
}

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@Test
public void addEmployee() throws EmployeeServiceException {
PowerMockito.mockStatic(ClassWithStaticMethod.class);
PowerMockito.when(ClassWithStaticMethod.getDetails(anyString()))
.thenAnswer(new Answer<String>() {
@Override
public String answer(InvocationOnMock invocation)
throws Throwable {
Object[] args = invocation.getArguments();
return (String) args[0];
}
});
final String response = employeeServiceImpl.addEmployee(new Request(
"Arpit"));
PowerMockito.verifyStatic();
assertThat(response, is("Arpit"));
}

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public class EmployeeServiceImpl implements IEmployeeService {
@Override
public String addEmployee(final Request request)
throws EmployeeServiceException {
if (request == null) {
throw new EmployeeServiceException("Invalid Request");
} else {
return ClassWithStaticMethod.getDetails(request.getName());
}
}
}

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public class ClassWithStaticMethod {
public static String getDetails(String name) {
return name;
}
}