java - 在文件基础服务上执行 junit 时出现 IOException

Question

我有以下 2 个 Junits。

public class TransactionManagerTest {

String fileName = "data/test/tnx-log/tnc.log";

@Test
public void beginTransactionTest_withEmptyTxnLogFile() throws IOException, ParseException {
    new File(fileName).delete();
    TransactionManager transactionManager = new TransactionManagerImpl(fileName);

    transactionManager.beginTransaction();
    ZonedDateTime transactionStartDate = transactionManager.getTransactionStartDate();
    ZonedDateTime transactionEndDate = transactionManager.getTransactionEndDate();
    ZonedDateTime now = ZonedDateTime.now();
    Assert.assertEquals(now.getDayOfMonth(), transactionStartDate.getDayOfMonth());
    Assert.assertEquals(now.getMonth(), transactionStartDate.getMonth());
    Assert.assertEquals(now.getYear(), transactionStartDate.getYear());
    Assert.assertEquals(0, transactionStartDate.getHour());
    Assert.assertEquals(0, transactionStartDate.getMinute());
    Assert.assertEquals(0, transactionStartDate.getSecond());

    Assert.assertEquals(now.getDayOfMonth(), transactionEndDate.getDayOfMonth());
    Assert.assertEquals(now.getMonth(), transactionEndDate.getMonth());
    Assert.assertEquals(now.getYear(), transactionEndDate.getYear());
    Assert.assertEquals(now.getHour(), transactionEndDate.getHour());
}

@Test
public void beginTransactionTest_success() throws IOException, ParseException {

    File file = new File(fileName);
    System.out.println(file.exists());
    System.out.println(file.delete());
    TransactionManager transactionManager = new TransactionManagerImpl(fileName);

    File localFile = new File(fileName);
    boolean txnLogFileExist = localFile.exists();
    localFile = null;
    Assert.assertTrue(txnLogFileExist);
    ZonedDateTime startDate = ZonedDateTime.of(2019, 04, 25, 10, 35, 30, 000, ZoneId.of("UTC"));
    ZonedDateTime endDate = ZonedDateTime.of(2019, 04, 25, 10, 40, 30, 000, ZoneId.of("UTC"));

    transactionManager.beginTransaction(startDate, endDate);
    transactionManager.markSuccess();

    ZonedDateTime transactionStartDate = transactionManager.getTransactionStartDate();
    ZonedDateTime transacitonEndDate = transactionManager.getTransactionEndDate();

    Assert.assertTrue(endDate.isEqual(transactionStartDate));
    Assert.assertNotNull(transacitonEndDate);
}

下面是 My TransacitonManager 和 CsvService 的实现。

public class TransactionManagerImpl implements TransactionManager {

private final Logger logger = LoggerFactory.getLogger(this.getClass());

private CsvService csvService;

public TransactionManagerImpl(String txnLogFile) throws IOException {
    this.csvService = new CsvServiceImpl(txnLogFile);
}

公共(public)类 CsvServiceImpl 实现 CsvService {

private final Logger logger = LoggerFactory.getLogger(this.getClass());

private String txnLogFile;

public CsvServiceImpl(String txnLogFile) throws IOException {
    this.txnLogFile = txnLogFile;
    createTxnInfoFile();
}

    @Override
public void createTxnInfoFile() throws IOException {
    File file = new File(txnLogFile);
    if (!file.exists()) {
        boolean directoryStructureCreated = file.getParentFile().mkdirs();
        logger.info("Directory structure created {} {} ", txnLogFile, directoryStructureCreated);
        boolean fileCreated = file.createNewFile();
        logger.info("txn log file created {} {} ", txnLogFile, fileCreated);
    }
    file = null;
}

问题是我的第一个 JUnit 运行良好，但是当我执行第二个 junit 时，CsvService.createTxnInfoFile 得到 IOException

java.io.IOException: Access is denied
    at java.io.WinNTFileSystem.createFileExclusively(Native Method)
    at java.io.File.createNewFile(File.java:1012)
    at dummy.name.service.impl.CsvServiceImpl.createTxnInfoFile(CsvServiceImpl.java:88)
    at dummy.name.service.impl.CsvServiceImpl.<init>(CsvServiceImpl.java:29)
    at dummy.name.service.impl.TransactionManagerImpl.<init>(TransactionManagerImpl.java:25)
    at dummy.name.service.TransactionManagerTest.beginTransactionTest_success(TransactionManagerTest.java:25)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
    at org.junit.vintage.engine.execution.RunnerExecutor.execute(RunnerExecutor.java:39)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184)
    at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
    at java.util.Iterator.forEachRemaining(Iterator.java:116)
    at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
    at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
    at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
    at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
    at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
    at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
    at java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
    at org.junit.vintage.engine.VintageTestEngine.executeAllChildren(VintageTestEngine.java:79)
    at org.junit.vintage.engine.VintageTestEngine.execute(VintageTestEngine.java:70)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:220)
    at org.junit.platform.launcher.core.DefaultLauncher.lambda$execute$6(DefaultLauncher.java:188)
    at org.junit.platform.launcher.core.DefaultLauncher.withInterceptedStreams(DefaultLauncher.java:202)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:181)
    at org.junit.platform.launcher.core.DefaultLauncher.execute(DefaultLauncher.java:128)
    at org.eclipse.jdt.internal.junit5.runner.JUnit5TestReference.run(JUnit5TestReference.java:89)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

output

2019-04-22 08:40:28,895 [main] INFO  g.t.service.impl.CsvServiceImpl - Directory structure created data/test/tnx-log/tnc.log false 
2019-04-22 08:40:28,895 [main] INFO  g.t.service.impl.CsvServiceImpl - file.getAbsoluteFile() : C:\Users\jigar\apps\workspace\trade-publisher\data\test\tnx-log\tnc.log canWrite() : false
2019-04-22 08:40:28,895 [main] INFO  g.t.service.impl.CsvServiceImpl - txn log file created data/test/tnx-log/tnc.log true 

2019-04-22 08:40:28,957 [main] INFO  g.t.service.impl.CsvServiceImpl - Directory structure created data/test/tnx-log/tnc.log false 
2019-04-22 08:40:28,957 [main] INFO  g.t.service.impl.CsvServiceImpl - file.getAbsoluteFile() : C:\Users\jigar\apps\workspace\trade-publisher\data\test\tnx-log\tnc.log canWrite() : false


    @Override
    public void createTxnInfoFile() throws IOException {
        File file = new File(txnLogFile);
        if (!file.exists()) {
            boolean directoryStructureCreated = file.getParentFile().mkdirs();
            logger.info("Directory structure created {} {} ", txnLogFile, directoryStructureCreated);
            logger.info("file.getAbsoluteFile() : " + file.getAbsoluteFile() + " canWrite() : " + file.canWrite());
            boolean fileCreated = file.createNewFile();
            logger.info("txn log file created {} {} ", txnLogFile, fileCreated);
        }
        file = null;
    }

Answer 1

问题已解决，而不是为每个测试删除并创建新文件。我现在删除文件内容而不删除实际文件，如下所示。

@After
public void tearDown() throws FileNotFoundException {
    this.transactionManager = null;
    PrintWriter writer = new PrintWriter(fileName);
    writer.print("");
    writer.close();
}