java - EasyMock 和参数化测试(JUnit 参数化)

Question

我想在参数化测试类中的类上使用@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();
        ....
    }
}

是否可以在参数化类中创建模拟对象？

Answer 1

EasyMock 需要一个规则或一个运行器来实例化带注释的模拟。由于您已经在使用运行者，因此您唯一的选择就是规则。以下内容将起作用。

@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，它可在 EasyMockSupport 上使用。

@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();
    }
}