如何将@InjectMocks 与参数化测试一起使用

Question

注意：我进行了搜索并阅读了各种博客，但找不到与我正在尝试做的相匹配的示例。

我有一个 ConverterService，它使用注入其中的 CodeService。我正在尝试编写一个 JUnit 测试，我在其中模拟 CodeService 并将该模拟注入到被测 ConverterService 中。测试已参数化。

考虑以下代码：

@RunWith(Parameterized.class)
public class ConverterServiceTest {

    @Parameters(name="{index}; Test case {0}")
    public static Collection<Object[]> initTestCases() {
        final Object[][] testCases = {
                { "One",   "First",   TypeEnum.ONE   },
                { "Two",   "Second",  TypeEnum.TWO   },
                { "Three", "Third",   TypeEnum.THREE },
                { "Four",  "Fourth",  TypeEnum.FOUR  },
                { "Five",  "Fifth",   TypeEnum.FIVE  },
                { "Six",   "Unknown", TypeEnum.BLANK }
        };
        return Arrays.asList(testCases);
    }

    @Parameter(0) private String   testName;
    @Parameter(1) private String   testCode;
    @Parameter(2) private TypeEnum expectedCode;

    @Rule public ExpectedException expected = ExpectedException.none();
    @Mock private CodeService codeService;
    @InjectMocks private ConverterService converter;

    @Before public void beforeEach() {
        MockitoAnnotations.initMocks(this);

        when(codeService.isOne(anyString())).thenReturn(false);
        when(codeService.isOne("First")).thenReturn(true);

        when(codeService.isTwo(anyString())).thenReturn(false);
        when(codeService.isTwo("Second")).thenReturn(true);

        when(codeService.isThree(anyString())).thenReturn(false);
        when(codeService.isThree("Third")).thenReturn(true);

        when(codeService.isFour(anyString())).thenReturn(false);
        when(codeService.isFour("Fourth")).thenReturn(true);

        when(codeService.isFive(anyString())).thenReturn(false);
        when(codeService.isFive("Fifth")).thenReturn(true);
    }

    @Test public void testCodeConverter() {
        assertThat(converter.convert(testCode), equalTo(expectedCode));
    }
}

我正在使用 Parameterized.class 运行程序，我正在使用 MockitoAnnotations.initMocks(this)，我的 @Before 正在初始化模拟 CodeService，但我没有注入 ConverterService。事实上，我遇到了一些奇怪的反射错误：

java.lang.IllegalAccessException: Class org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters can not access a member of class com.company.converter.ConverterServiceTest with modifiers "private" at sun.reflect.Reflection.ensureMemberAccess(Reflection.java:102) at java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:296) at java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:288) at java.lang.reflect.Field.set(Field.java:761) at org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters.createTestUsingFieldInjection(BlockJUnit4ClassRunnerWithParameters.java:62) at org.junit.runners.parameterized.BlockJUnit4ClassRunnerWithParameters.createTest(BlockJUnit4ClassRunnerWithParameters.java:36) at org.junit.runners.BlockJUnit4ClassRunner.runReflectiveCall(BlockJUnit4ClassRunner.java:266) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=11=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=11=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)

它似乎不喜欢我的测试成员字段之一是私有的，但没有告诉我哪个字段有问题。我看过的所有单元测试例子，唯一的public一定是ExpectedException规则

Answer 1

对不起，我是个笨蛋。问题是 @Parameter(x) 内部成员需要 public，而不是私有的。

我花了很长时间寻找 Google。 :-)

如何将@InjectMocks 与参数化测试一起使用

How do I use @InjectMocks with a Parameterized test

java

dependency-injection

parameterized

mockito