问如何使用PowerMock & Mockito模拟枚举类的实例？
EN

Stack Overflow用户

提问于 2015-05-08 15:05:22

回答 3查看 26.4K关注 0票数 8

我试图遵循这个非常相似的问题的答案中提供的示例，但它对我不起作用。我得到以下错误消息：

java.lang.IllegalArgumentException: Cannot subclass final class class com.myproject.test.support.ExampleEnumerable
    at org.mockito.cglib.proxy.Enhancer.generateClass(Enhancer.java:447)
    at org.mockito.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
    at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:217)
    at org.mockito.cglib.proxy.Enhancer.createHelper(Enhancer.java:378)
    at org.mockito.cglib.proxy.Enhancer.createClass(Enhancer.java:318)
    at org.powermock.api.mockito.repackaged.ClassImposterizer.createProxyClass(ClassImposterizer.java:123)
    at org.powermock.api.mockito.repackaged.ClassImposterizer.imposterise(ClassImposterizer.java:57)
    at org.powermock.api.mockito.internal.mockcreation.MockCreator.createMethodInvocationControl(MockCreator.java:110)
    at org.powermock.api.mockito.internal.mockcreation.MockCreator.mock(MockCreator.java:58)
    at org.powermock.api.mockito.PowerMockito.mock(PowerMockito.java:143)

我需要一个简单的enum class模拟实例。我不需要模仿它的任何方法。

下面是我想模拟的类：

public enum ExampleEnumerable implements IEnumerable<ExampleEnumerable> {
    EXAMPLE_ENUM_1("Test Enum 1"),
    EXAMPLE_ENUM_2("Test Enum 2");

    final String alias;

    ExampleEnumerable(final String alias) {
        this.alias = alias;
    }

    @SuppressWarnings({"VariableArgumentMethod", "unchecked"})
    @Override
    public @Nullable
    String getAlias(final @Nonnull IEnumerable<? extends Enum<?>>... context) {
        return alias;
    }
}

我有以下TestNG设置：

import static org.powermock.api.mockito.PowerMockito.mock;

@PrepareForTest({ ExampleEnumerable.class})
@Test(groups = {"LoadableBuilderTestGroup"})
public class LoadableBuilderTest {

    private ExampleEnumerable mockEnumerable;

    @BeforeMethod
    public void setUp() {
        mockEnumerable = mock(ExampleEnumerable.class);
    }
}

java

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mockito

powermock

powermockito

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回答 3

Stack Overflow用户

回答已采纳

发布于 2015-05-12 14:25:47

我通过扩展为TestNG处理这类事情的PowerMockTestCase类实现了这一点：

@PrepareForTest(TestEnumerable.class)
@Test(groups = {"LoadableBuilderTestGroup"})
public class LoadableBuilderTest extends PowerMockTestCase {

 private TestEnumerable mockEnumerable;

 @SuppressWarnings("unchecked")
    @BeforeMethod
    public void setUp() {
        mockEnumerable = PowerMockito.mock(TestEnumerable.class);

    }
}

票数 3

Stack Overflow用户

发布于 2015-05-08 15:42:50

您需要使用PowerMockRunner运行此命令

例如：

@RunWith(PowerMockRunner.class)
@PrepareForTest({ ExampleEnumerable.class})
@Test(groups = {"LoadableBuilderTestGroup"})
public class LoadableBuilderTest {
    private ExampleEnumerable mockEnumerable;

    @BeforeMethod
    public void setUp() {
        mockEnumerable = mock(ExampleEnumerable.class);
    }
}

票数 5

Stack Overflow用户

发布于 2020-11-11 17:32:58

大家好，对我来说是这样的：

首先在pom.xml上添加power模拟：

<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>2.0.4</version>
    <scope>test</scope>
</dependency>

，然后是我的类：

@RunWith(PowerMockRunner.class)
@PrepareForTest({EnumClass.class})
public class EnumClassTest{
    private EnumClassTest enumClassTest;
    
    @Before
    public void setUp() {
        enumClassTest = mock(EnumClassTest.class);
    }
    
    @Test
    public void someMethod() {
        //My code test here
    }