EasyMock和參數化測試（JUnit參數化）

Question

我想在參數化測試類中的類上使用@Mock。 但是由於某些原因，mockClassB為NULL。 我的代碼類似於

@RunWith(Parameterized.class)
public class ClassATest extends EasyMockSupport {

    private String uniqueIdentifier;
    private String value;

    @Mock
    private ClassB mockClassB;

    public ClassATest(String uniqueIdentified, String value) {
        this.uniqueIdentifier = uniqueIdentified;
        this.value = value;
    }

    ...

    @Parameterized.Parameters(name = "{index}: id = {0}; value = {1}")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
                {"1", "val1"},
                {"2", "val2"}});
    }

    @Test
    public void testMethod() {
        ...
        expect(mockClassB.someMethod(uniqueIdentifier)).andReturn(value);   // mockClassB is NULL
        replayAll();
        ....
    }
}

是否可以在參數化類中創建模擬對象？

Answer 1

嘗試添加setUp方法：

@Before
public void setUp() {
    initMocks(this);
}

Answer 2

正確的代碼將在下面顯示

@RunWith(Parameterized.class)
public class ClassATest extends EasyMockSupport {

    private String uniqueIdentifier;
    private String value;

    private ClassB mockClassB;

    public ClassATest(String uniqueIdentified, String value) {
        this.uniqueIdentifier = uniqueIdentified;
        this.value = value;
    }

    ...

    @Parameterized.Parameters(name = "{index}: id = {0}; value = {1}")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
               {"1", "val1"},
               {"2", "val2"}});
    }

    @Before
    public void setup() {
        ...
        mockClassB = mock(ClassB.class);
        ...
    }

    @Test
    public void testMethod() {
       ...
       expect(mockClassB.someMethod(uniqueIdentifier)).andReturn(value);   // mockClassB will be mocked :)
       replayAll();
       ....
    }
}

Answer 3

EasyMock需要規則或運行器來實例化帶注釋的模擬。 由於您已經在使用跑步者，因此唯一的選擇就是規則。 以下將起作用。

@RunWith(Parameterized.class)
public class ClassATest extends EasyMockSupport {

    @Rule
    public EasyMockRule rule = new EasyMockRule(this);

    private String uniqueIdentifier;
    private String value;

    @Mock
    private ClassB mockClassB;

    public ClassATest(String uniqueIdentified, String value) {
        this.uniqueIdentifier = uniqueIdentified;
        this.value = value;
    }

    @Parameterized.Parameters(name = "{index}: id = {0}; value = {1}")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
                {"1", "val1"},
                {"2", "val2"}});
    }

    @Test
    public void testMethod() {
        expect(mockClassB.someMethod(uniqueIdentifier)).andReturn(value);   // mockClassB is NULL
        replayAll();
    }
}

另一種方法是直接調用EasyMockSupport上可用的injectMocks 。

@RunWith(Parameterized.class)
public class ClassATest extends EasyMockSupport {

    private String uniqueIdentifier;
    private String value;

    @Mock
    private ClassB mockClassB;

    public ClassATest(String uniqueIdentified, String value) {
        this.uniqueIdentifier = uniqueIdentified;
        this.value = value;
    }

    @Before
    public void before() {
        injectMocks(this);
    }

    @Parameterized.Parameters(name = "{index}: id = {0}; value = {1}")
    public static Collection<Object[]> data() {
        return Arrays.asList(new Object[][]{
                {"1", "val1"},
                {"2", "val2"}});
    }

    @Test
    public void testMethod() {
        expect(mockClassB.someMethod(uniqueIdentifier)).andReturn(value);   // mockClassB is NULL
        replayAll();
    }
}