@Test
public void testReadFileContents() throws Exception {
Path testPath = new Path(TestUtils.createTempDir().getAbsolutePath(), "tempFile");
FileSystem fs = testPath.getFileSystem(new Configuration());
fs.create(testPath);
// 1) Read back empty file
String emptyString = HadoopStoreBuilderUtils.readFileContents(fs, testPath, 1024);
Assert.assertEquals(emptyString.length(), 0);
// 2) Read back random bytes
byte[] randomBytes = writeRandomData(testPath, 10);
// Read back data
Assert.assertEquals(
HadoopStoreBuilderUtils.readFileContents(fs, testPath, 1024), new String(randomBytes));
// 3) Write a json string
fs.delete(testPath, true);
fs.create(testPath);
ReadOnlyStorageMetadata metadata = new ReadOnlyStorageMetadata();
metadata.add(ReadOnlyStorageMetadata.FORMAT, ReadOnlyStorageFormat.READONLY_V2.getCode());
// Write file contents
new FileOutputStream(testPath.toString()).write(metadata.toJsonString().getBytes());
ReadOnlyStorageMetadata readMetadata =
new ReadOnlyStorageMetadata(HadoopStoreBuilderUtils.readFileContents(fs, testPath, 1024));
Assert.assertEquals(
readMetadata.get(ReadOnlyStorageMetadata.FORMAT),
ReadOnlyStorageFormat.READONLY_V2.getCode());
}
