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我有我在使用隨機訪問文件寫入文件的代碼..爲了測試該功能，我試圖驗證writeBytes（）調用是否發生..但是，因爲我嘲笑隨機訪問文件..測試拋出和IO異常說'流關閉'..我想這可能是因爲我嘲笑隨機訪問文件....任何建議/解決方法表示讚賞。嘲笑一個隨機訪問文件
@Test
public void testWriteGradesIntoFile_WriteFirstRecord() throws Exception {
final String firstRecord = new String(empID + "," + score);
PowerMockito.whenNew(File.class).withArguments(outputFileName + ".csv")
.thenReturn(outputFileMock);
PowerMockito.whenNew(RandomAccessFile.class)
.withArguments(outputFileMock, "rw").thenReturn(outputRAFMock);
PowerMockito.mockStatic(WriteGradeReportToCSV.class);
Mockito.when(WriteGradeReportToCSV.checkFileIsEmpty(outputRAFMock))
.thenReturn(true);
Mockito.when(outputRAFMock.length()).thenReturn(fileLength);
Mockito.doNothing().when(outputRAFMock).seek(fileLength);
Mockito.when(gradeReportMock.getEmpId()).thenReturn(empID);
Mockito.when(gradeReportMock.getScore()).thenReturn(score);
Mockito.doNothing().when(outputRAFMock).writeBytes(firstRecord);
writeGradeToCSV.writeGradesIntoFile(gradeReportMock, outputFileName);
Mockito.verify(outputRAFMock, Mockito.times(1)).close();
}
它的功能如下：
File outputCSVFile = null;
RandomAccessFile outputRAF = null;
try {
outputCSVFile = new File(outputFileName + ".csv");
if (outputCSVFile != null) {
outputRAF = new RandomAccessFile(outputCSVFile, "rw");
if (checkFileIsEmpty(outputRAF)) {
// File is empty.Hence write the first record.
outputRAF.seek(outputRAF.length());
outputRAF.writeBytes(new StringBuffer(gradeReport
.getEmpId() + "," + gradeReport.getScore())
.toString());
outputRAF.close();
}
}
故障跟蹤如下：
java.io.IOException: Stream Closed
at java.io.RandomAccessFile.writeBytes0(Native Method)
at java.io.RandomAccessFile.writeBytes(RandomAccessFile.java:520)
at java.io.RandomAccessFile.writeBytes(RandomAccessFile.java:1123)
at com.cerner.devcenter.wag.util.WriteGradeReportToCSV_writeGradesIntoFileTest.testWriteGradesIntoFile_WriteFirstRecord(WriteGradeReportToCSV_writeGradesIntoFileTest.java:132)
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.TestMethod.invoke(TestMethod.java:68)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:310)
at org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:88)
at org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:96)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.executeTest(PowerMockJUnit44RunnerDelegateImpl.java:294)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTestInSuper(PowerMockJUnit47RunnerDelegateImpl.java:127)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit47RunnerDelegateImpl$PowerMockJUnit47MethodRunner.executeTest(PowerMockJUnit47RunnerDelegateImpl.java:82)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$PowerMockJUnit44MethodRunner.runBeforesThenTestThenAfters(PowerMockJUnit44RunnerDelegateImpl.java:282)
at org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:86)
at org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.invokeTestMethod(PowerMockJUnit44RunnerDelegateImpl.java:207)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.runMethods(PowerMockJUnit44RunnerDelegateImpl.java:146)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl$1.run(PowerMockJUnit44RunnerDelegateImpl.java:120)
at org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:33)
at org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:45)
at org.powermock.modules.junit4.internal.impl.PowerMockJUnit44RunnerDelegateImpl.run(PowerMockJUnit44RunnerDelegateImpl.java:118)
at org.powermock.modules.junit4.common.internal.impl.JUnit4TestSuiteChunkerImpl.run(JUnit4TestSuiteChunkerImpl.java:104)
at org.powermock.modules.junit4.common.internal.impl.AbstractCommonPowerMockRunner.run(AbstractCommonPowerMockRunner.java:53)
at org.powermock.modules.junit4.PowerMockRunner.run(PowerMockRunner.java:53)
at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:252)
at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:141)
at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:112)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.maven.surefire.util.ReflectionUtils.invokeMethodWithArray(ReflectionUtils.java:189)
at org.apache.maven.surefire.booter.ProviderFactory$ProviderProxy.invoke(ProviderFactory.java:165)
at org.apache.maven.surefire.booter.ProviderFactory.invokeProvider(ProviderFactory.java:85)
at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:115)
at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:75)
你能給我們一個堆棧跟蹤，並確定從哪個行拋出異常？ – 2014-11-24 22:10:55