private void doUploadDownloadFileTest(CloudPageBlob blob, int fileSize) throws IOException, StorageException { File sourceFile = File.createTempFile("sourceFile", ".tmp"); File destinationFile = new File(sourceFile.getParentFile(), "destinationFile.tmp"); try { byte[] buffer = BlobTestHelper.getRandomBuffer(fileSize); FileOutputStream fos = new FileOutputStream(sourceFile); fos.write(buffer); fos.close(); blob.uploadFromFile(sourceFile.getAbsolutePath()); blob.downloadToFile(destinationFile.getAbsolutePath()); assertTrue("Destination file does not exist.", destinationFile.exists()); assertEquals( "Destination file does not match input file.", fileSize, destinationFile.length()); FileInputStream fis = new FileInputStream(destinationFile); byte[] readBuffer = new byte[fileSize]; fis.read(readBuffer); fis.close(); for (int i = 0; i < fileSize; i++) { assertEquals("File contents do not match.", buffer[i], readBuffer[i]); } } finally { if (sourceFile.exists()) { sourceFile.delete(); } if (destinationFile.exists()) { destinationFile.delete(); } } }