PowerMock – 模拟静态系统类抛出IllegalStateException
我有以下代码
public class A{ public void createFile() { File tempXmlFile = null; String extension = ".xml"; String name = "someName"; try { tempXmlFile = File.createTempFile(name, extension); if (tempXmlFile.exists()) { tempXmlFile.delete(); } } catch (IOException e) { System.out.println(e.getStackTrace()); } } } @RunWith(PowerMockRunner.class) @PrepareForTest(A.class) public class testA extends TestCase{ private A classUnderTest; @Override @Before public void setUp() { classUnderTest = PowerMock.createMock(A.class); //the class is more complex in my case and I have to mock it } public void testCreateFile() throws IOException{ String extension = ".xml"; String name = "someName"; PowerMock.mockStatic(File.class); File tempFileMock = PowerMock.createMock(File.class); expect(File.createTempFile(name, extension)).andReturn(tempFileMock); expect(tempFileMock.exists()).andReturn(true); expect(tempFileMock.delete()).andReturn(true); replay(File.class, tempFileMock, classUnderTest); classUnderTest.createFile(); verify(File.class, tempFileMock, classUnderTest); } } 在测试类中，我说测试中的类必须被模拟（我无法创建新对象）。 当我运行测试时，我得到：
java.lang.IllegalStateException: no last call on a mock available at org.easymock.EasyMock.getControlForLastCall(EasyMock.java:174) at org.easymock.EasyMock.expect(EasyMock.java:156) at myPackage.testA.testCreateFile(testA.java:35) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.internal.runners.TestMethod.invoke(TestMethod.java:59) at org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:98) at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:79) at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:87) at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:77) at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:42) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:163) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:120) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:113) at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:27) at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:37) at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:111) at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:87) at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:44) at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49) at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390) at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
我在这里阅读http://code.google.com/p/powermock/wiki/MockSystem上的文档，但测试stil不起作用。 我错过了什么吗？
编辑：我用一个真正的A对象测试了以前的代码（并从重放中删除了它）
classUnderTest = new A();
但我仍然得到同样的例外。
尝试将File.class添加到@PrepareForTest。
尝试使用org.powermock.reflect.internal.WhiteboxImpl.newInstance（）方法创建类的对象，然后直接调用方法。 1）这将抑制类2的构造函数如果您的类包含静态块然后使用suppressStaticInitilaizationFor来抑制它。
关于Anil Sharma
将File.class添加到@PrepareForTest并检查重放的导入并validation。 他们应该来自PowerMock。
我认为你需要压缩构造函数
请查看此http://code.google.com/p/powermock/wiki/SuppressUnwantedBehavior