Java单元测试异常

Question

public Document query(String uri) throws IOException, IllegalArgumentException 
{ 

    final HttpGet httpget = new HttpGet(uri); 
    final HttpResponse response = httpclient.execute(httpget); 
    final HttpEntity entity = response.getEntity(); 
    Document doc = null; 
    try 
    { 
     DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
     DocumentBuilder builder = factory.newDocumentBuilder(); 
     doc = builder.parse(entity.getContent()); 
    } 
    catch (SAXException e) 
    { 

     LOGGER.error(e); 
     throw new IllegalArgumentException("parse error" + e); 
    } 
    catch (ParserConfigurationException e) 
    { 

     LOGGER.error(e); 
     throw new IllegalArgumentException("parameter factor is invalid: " + e); 
    } 
    catch (IllegalStateException e) 
    { 

     LOGGER.error(e); 
     throw new IllegalArgumentException("null entity contetents" + e); 
    } 

    return doc; 
} 


@Test(expected = IllegalArgumentException.class) 
public void testQuery_ParseExceptionThrown() throws Exception 
{ 
    String uri ="some uri"; 
    EasyMock.expect(httpClient.execute(EasyMock.isA(HttpGet.class))).andReturn(mockResponse); 
    EasyMock.expect(mockResponse.getEntity()).andReturn(mockEntity); 
    EasyMock.expect(mockEntity.getContent()).andReturn(new ByteArrayInputStream(REPSONSE_EXAMPLE.getBytes())); 
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance(); 
    DocumentBuilder builder = factory.newDocumentBuilder(); 


    EasyMock.expect(builder.parse(EasyMock.isA(InputStream.class))).andThrow(
      new IllegalArgumentException("expected")); 
    EasyMock.replay(); 
    class.query(uri); 

} 

错误：

java.lang.IllegalStateException: calling verify is not allowed in record state 
    at org.easymock.internal.MocksControl.verify(MocksControl.java:181) 
    at org.powermock.api.easymock.internal.invocationcontrol.EasyMockMethodInvocationControl.verify(EasyMockMethodInvocationControl.java:120) 
    at org.powermock.api.easymock.PowerMock.verify(PowerMock.java:1650) 
    at org.powermock.api.easymock.PowerMock.verifyAll(PowerMock.java:1586) 
    at com.amazon.ams.test.AbstractUnitTest.verifyMocks(AbstractUnitTest.java:78) 
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
    at java.lang.reflect.Method.invoke(Method.java:606) 
    at org.junit.internal.runners.MethodRoadie.runAfters(MethodRoadie.java:145) 
    at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:99) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:296) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:112) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:73) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:284) 
    at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:84) 
    at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:209) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:148) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:122) 
    at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34) 
    at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44) 
    at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:120) 
    at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:102) 
    at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53) 
    at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:42) 
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50) 
    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) 

我不断收到一些错误，如

java.lang.AssertionError: Expected exception: org.xml.sax.SAXException 
java.lang.IllegalStateException: calling verify is not allowed in record state 

有3个例外，我需要写JUnit测试就可以进入例外。有谁知道如何使用powermock或easymock类来编写单元测试吗？

Answer 1

如果您对builder一个模拟使用了EasyMock你可以扔掉，而不是返回值异常：

EasyMock.expect(builder.parse(myContent)).andThrow(myException); 

哪里myException是要抛出一个异常实例（由新创建MyException（...） ）;

编辑：例如测试代码：

@Test 
public void parseThrowsIllegalStateException(){ 
    //... creating mock factory, builder and entity not shown 

    //create new Exception to be thrown 
    IllegalStateException expectedException = new IllegalStateException("expected"); 

    EasyMock.expect(mockBuilder.parse(mockContent).andThrow(expectedException); 

    EasyMock.replay(...); 

    //exercise your system under test which tries to parse the entity's Content 
    //... 
} 

编辑2：现在你发布你的实际测试的代码，我认为这个问题可能是这几行：

EasyMock.expect(mockEntity.getContent()).andReturn(new ByteArrayInputStream(REPSONSE_EXAMPLE.getBytes())); 

... 
EasyMock.expect(builder.parse(new ByteArrayInputStream(malformed_XML.getBytes()))).andThrow(new SAXException("expected")); 

我不认为ByteArrayInputStream的重写equals（），因此它使用Object.equals（）。该ByteArrayInputStreams将不等于这样的EasyMock不会抛出异常

我会改变builder.parse（）预期到：

EasyMock.expect(builder.parse(EasyMock.isA(InputStream.class))).andThrow(new SAXException("expected")); 

解析时被称为无论InputStream为什么这将抛出。

作为一个方面说明，您的错误消息提到“调用验证不允许在记录状态”，但我没有看到任何调用verify（）或verifyAll（）的任何地方。