/** Tests that a {@link DummyFileOutputStream} is returned. */ @Test public void getDummyOutStreamTest() throws Exception { AlluxioURI path = new AlluxioURI("test"); Mockito.when(mLineageMasterClient.reinitializeFile("test", TEST_BLOCK_SIZE, 0)).thenReturn(-1L); CreateFileOptions options = CreateFileOptions.defaults().setBlockSizeBytes(TEST_BLOCK_SIZE).setTtl(0); FileOutStream outStream = mAlluxioLineageFileSystem.createFile(path, options); Assert.assertTrue(outStream instanceof DummyFileOutputStream); // verify client is released Mockito.verify(mLineageContext).releaseMasterClient(mLineageMasterClient); }