Mockito Mock 객체 초기화하기
환경
- Java
 - Mockito
 
org.mockito.Mockito.reset
reset 메소드
    ...
    @Mock
    private UserRepository userRepository;
    ...
    reset(userRepository);
    ...
Mockito Mock 객체 초기화하기
    ...
    @Mock
    private UserRepository userRepository;
    ...
    reset(userRepository);
    ...
Reset Mockito Mock Object
    ...
    @Mock
    private UserRepository userRepository;
    ...
    reset(userRepository);
    ...
ReflectionTestUtils를 사용해 private 변수나 메소드(함수)를 테스트하는 방법을 알아보자
@Component
@Getter
public class ReflectionTestUtilsComponent {
    private int privateValue;
    private int privateMethod(int a, int b) {
        privateValue += a;
        privateValue += b;
        return privateValue;
    }
}
static void	setField(Class<?> targetClass, String name, Object value)
static void	setField(Class<?> targetClass, String name, Object value, Class<?> type)
static void	setField(Object targetObject, Class<?> targetClass, String name, Object value, Class<?> type)
static void	setField(Object targetObject, String name, Object value)
static void	setField(Object targetObject, String name, Object value, Class<?> type)
@Test
public void testPrivateValue() {
    ReflectionTestUtils.setField(reflectionTestUtilsComponent, "privateValue", 100);
    // ReflectionTestUtils.setField(대상 객체, "변수명", 원하는 값);
    Assertions.assertEquals(100, reflectionTestUtilsComponent.getPrivateValue());
}
static <T> T	invokeMethod(Class<?> targetClass, String name, Object... args)
static <T> T	invokeMethod(Object targetObject, Class<?> targetClass, String name, Object... args)
static <T> T	invokeMethod(Object target, String name, Object... args)
@Test
public void testPrivateMethod() {
    ReflectionTestUtils.setField(reflectionTestUtilsComponent, "privateValue", 100);
    // ReflectionTestUtils.setField(대상 객체, "변수명", 원하는 값);
    Assertions.assertEquals(103, (Integer) ReflectionTestUtils.invokeMethod(reflectionTestUtilsComponent, "privateMethod", 1, 2));
    // ReflectionTestUtils.invokeMethod(대상 객체, "메소드(함수)명", 인자);
    Assertions.assertEquals(103, reflectionTestUtilsComponent.getPrivateValue());
}
Test private variable or method(function) using ReflectionTestUtils
@Component
@Getter
public class ReflectionTestUtilsComponent {
    private int privateValue;
    private int privateMethod(int a, int b) {
        privateValue += a;
        privateValue += b;
        return privateValue;
    }
}
static void	setField(Class<?> targetClass, String name, Object value)
static void	setField(Class<?> targetClass, String name, Object value, Class<?> type)
static void	setField(Object targetObject, Class<?> targetClass, String name, Object value, Class<?> type)
static void	setField(Object targetObject, String name, Object value)
static void	setField(Object targetObject, String name, Object value, Class<?> type)
@Test
public void testPrivateValue() {
    ReflectionTestUtils.setField(reflectionTestUtilsComponent, "privateValue", 100);
    // ReflectionTestUtils.setField(target object, "variable name", target value);
    Assertions.assertEquals(100, reflectionTestUtilsComponent.getPrivateValue());
}
static <T> T	invokeMethod(Class<?> targetClass, String name, Object... args)
static <T> T	invokeMethod(Object targetObject, Class<?> targetClass, String name, Object... args)
static <T> T	invokeMethod(Object target, String name, Object... args)
@Test
public void testPrivateMethod() {
    ReflectionTestUtils.setField(reflectionTestUtilsComponent, "privateValue", 100);
    // ReflectionTestUtils.setField(target object, "variable name", target value);
    Assertions.assertEquals(103, (Integer) ReflectionTestUtils.invokeMethod(reflectionTestUtilsComponent, "privateMethod", 1, 2));
    // ReflectionTestUtils.invokeMethod(target object, "method(function) name", arguments);
    Assertions.assertEquals(103, reflectionTestUtilsComponent.getPrivateValue());
}
gradle build 또는 test 후에 테스트 결과를 표시해보자
test {
    useJUnitPlatform()
    testLogging {
        afterSuite { testDescriptor, testResult ->
            if (testDescriptor.parent == null) {
                println "Results: ${testResult.resultType} (${testResult.testCount} tests, ${testResult.successfulTestCount} successes, ${testResult.failedTestCount} failures, ${testResult.skippedTestCount} skipped)"
            }
        }
    }
}
afterSuite: Test Suite가 실행되고나서 실행되는 부분testDescriptor: 테스트에 대한 정보를 가지고 있는 인터페이스testResult: 테스트 결과에 대한 정보를 가지고 있는 인터페이스testDescriptor.parent == null: TestDescriptor의 부모가 null일때 실행하며 이는 테스트가 다 끝났음을 의미Taewoo-Macbook-Air-M1-2020:SpringBatchTestExample taewoo$ ./gradlew build
...
> Task :test
...
Results: SUCCESS (6 tests, 6 successes, 0 failures, 0 skipped)
...
BUILD SUCCESSFUL in 10s
6 actionable tasks: 3 executed, 3 up-to-date