EasyMock 和参数化测试（JUnit 参数化）

Question

我想在 class 内部参数化测试 class 上使用 @Mock。但由于某些原因，mockClassB 为 NULL。我的代码类似于

@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();
        ....
    }
}

是否可以在参数化的 class 中创建模拟对象？

Answer 1

尝试添加设置方法：

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

Answer 2

正确的代码看下面

@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 需要一个规则或运行器来实例化带注释的模拟。由于您已经在使用跑步者，因此您唯一的选择就是规则。以下将起作用。

@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();
    }
}

另一种方法是直接调用 injectMocks，它在 EasyMockSupport 上可用。

@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();
    }
}

EasyMock 和参数化测试（JUnit 参数化）

EasyMock and parameterized tests (JUnit parameterized)

java

junit4

easymock

parameterized