PowerMockito 在定义第二个“when”子句时调用模拟对象上的真实方法

Question

当使用不同参数调用方法时，我试图定义一些不同的模拟行为。 不幸的是，我发现第二次尝试在（模拟的）类上模拟给定的方法时，它运行了实际的方法，由于匹配器不是有效参数而导致异常。 有谁知道我如何防止这种情况发生？

    manager = PowerMockito.mock(Manager.class);
    try {
        PowerMockito.whenNew(Manager.class).withArguments(anyString(), anyString())
                .thenReturn(manager);
    } catch (Exception e) {
        e.printStackTrace();
    }
    FindAuthorityDescriptionRequestImpl validFindAuthorityDescription = mock(FindAuthorityDescriptionRequestImpl.class);
    PowerMockito.when(manager.createFindAuthorityDescriptionRequest(anyString(), anyString())).thenCallRealMethod();
    PowerMockito.when(manager.createFindAuthorityDescriptionRequest(Matchers.eq(VALID_IK),
            Matchers.eq(VALID_CATEGORY_NAME))).thenReturn(validFindAuthorityDescription);
    PowerMockito.when(manager.processRequest(Matchers.any(FindAuthorityDescriptionRequest.class)))
            .thenThrow(ManagerException.class);
    PowerMockito.when(manager.processRequest(Matchers.eq(validFindAuthorityDescription)))
            .thenReturn(generateValidAuthorityDescriptionResponse());

Answer 1

以下代码是基于您的模拟设置的工作示例（我添加了虚拟类以使其可运行）。

该代码还包含断言以验证模拟方法是否返回预期值。 此外，真正的方法createFindAuthorityDescriptionRequest只调用一次。

注意：这是用 `powermock 2.0.7` 和 `mockito 2.21.0` 测试的。

如果问题仍然存在，我建议检查是否没有从程序中的其他地方额外调用真正的方法（除了问题陈述中引用的代码）。

 package com.example.stack; import org.junit.Test; import org.junit.function.ThrowingRunnable; import org.junit.runner.RunWith; import org.powermock.api.mockito.PowerMockito; import org.powermock.core.classloader.annotations.PrepareForTest; import org.powermock.modules.junit4.PowerMockRunner; import static org.junit.Assert.assertEquals; import static org.junit.Assert.assertThrows; import static org.mockito.ArgumentMatchers.*; import static org.powermock.api.mockito.PowerMockito.mock; @RunWith(PowerMockRunner.class) @PrepareForTest(fullyQualifiedNames = "com.example.stack.*") public class StackApplicationTests { private static final String VALID_IK = "IK"; private static final String VALID_CATEGORY_NAME = "CATEGORY_NAME"; private static final Object VALID_RESPONSE = "RESPONSE"; @Test public void test() { Manager manager = mock(Manager.class); try { PowerMockito.whenNew(Manager.class).withArguments(anyString(), anyString()) .thenReturn(manager); } catch (Exception e) { e.printStackTrace(); } FindAuthorityDescriptionRequestImpl validFindAuthorityDescription = mock(FindAuthorityDescriptionRequestImpl.class); PowerMockito.when(manager.createFindAuthorityDescriptionRequest(anyString(), anyString())).thenCallRealMethod(); PowerMockito.when(manager.createFindAuthorityDescriptionRequest(eq(VALID_IK), eq(VALID_CATEGORY_NAME))) .thenReturn(validFindAuthorityDescription); PowerMockito.when(manager.processRequest(any(FindAuthorityDescriptionRequest.class))) .thenThrow(ManagerException.class); PowerMockito.when(manager.processRequest(eq(validFindAuthorityDescription))) .thenReturn(VALID_RESPONSE); // verify that the mock returns expected results assertEquals(Manager.REAL_RESULT, manager.createFindAuthorityDescriptionRequest("any", "any")); assertEquals(validFindAuthorityDescription, manager.createFindAuthorityDescriptionRequest("IK", "CATEGORY_NAME")); assertThrows(ManagerException.class, new ThrowingRunnable(){ @Override public void run( ) { manager.processRequest(new FindAuthorityDescriptionRequestImpl()); } }); assertEquals(VALID_RESPONSE, manager.processRequest(validFindAuthorityDescription)); } } interface FindAuthorityDescriptionRequest {} class FindAuthorityDescriptionRequestImpl implements FindAuthorityDescriptionRequest {} class ManagerException extends RuntimeException {} class Manager { public static FindAuthorityDescriptionRequestImpl REAL_RESULT = new FindAuthorityDescriptionRequestImpl(); public Manager(String s1, String s2) {} public FindAuthorityDescriptionRequest createFindAuthorityDescriptionRequest(String ik, String category) { return REAL_RESULT; } public Object processRequest(FindAuthorityDescriptionRequest request) { return null; } }