fhueske commented on a change in pull request #6823: [FLINK-10134] UTF-16
support for TextInputFormat bug refixed
URL: https://github.com/apache/flink/pull/6823#discussion_r225579332
##########
File path:
flink-java/src/test/java/org/apache/flink/api/java/io/TextInputFormatTest.java
##########
@@ -207,12 +207,212 @@ private void testRemovingTrailingCR(String lineBreaker,
String delimiter) {
assertEquals(content, result);
}
+ } catch (Throwable t) {
+ System.err.println("test failed with exception: " +
t.getMessage());
+ t.printStackTrace(System.err);
+ fail("Test erroneous");
}
- catch (Throwable t) {
+ }
+
+ /**
+ * Test different file encodings,for example: UTF-8, UTF-8 with bom,
UTF-16LE, UTF-16BE, UTF-32LE, UTF-32BE.
+ */
+ @Test
+ public void testFileCharset() {
+ String first = "First line";
+
+ // Test special different languages
+ for (final String data : new String[]{"Hello", "ハロー", "привет",
"Bonjour", "Сайн байна уу", "안녕하세요."}) {
+ testAllFileCharsetNoDelimiter(data);
+ }
+
+ // Test special symbol
+ for (final String delimiterStr : new String[]{"\\", "^", "|",
"[", ".", "*"}) {
+ first = "Fir" + delimiterStr + "st li" + delimiterStr +
"ne";
+ testAllFileCharsetWithDelimiter(first, delimiterStr);
+ }
+ }
+
+ private void testAllFileCharsetNoDelimiter(String first) {
+ testAllFileCharsetWithDelimiter(first, "");
+ }
+
+ private void testAllFileCharsetWithDelimiter(String first, String
delimiter) {
+ try {
+ final byte[] noBom = new byte[]{};
+ final byte[] utf8Bom = new byte[]{(byte) 0xEF, (byte)
0xBB, (byte) 0xBF};
+ final byte[] utf16LEBom = new byte[]{(byte) 0xFF,
(byte) 0xFE};
+ final byte[] utf16BEBom = new byte[]{(byte) 0xFE,
(byte) 0xFF};
+ final byte[] utf32LEBom = new byte[]{(byte) 0xFF,
(byte) 0xFE, (byte) 0x00, (byte) 0x00};
+ final byte[] utf32BEBom = new byte[]{(byte) 0x00,
(byte) 0x00, (byte) 0xFE, (byte) 0xFF};
+
+ // test UTF-8 have bom
+ testFileCharset(first, "UTF-8", "UTF-32", 1, utf8Bom,
delimiter.getBytes("UTF-8"));
+ // test UTF-8 without bom
+ testFileCharset(first, "UTF-8", "UTF-8", 0, noBom,
delimiter.getBytes("UTF-8"));
+ // test UTF-16LE without bom
+ testFileCharset(first, "UTF-16LE", "UTF-16LE", 0,
noBom, delimiter.getBytes("UTF-16LE"));
+ // test UTF-16BE without bom
+ testFileCharset(first, "UTF-16BE", "UTF-16BE", 0,
noBom, delimiter.getBytes("UTF-16BE"));
+ // test UTF-16LE have bom
+ testFileCharset(first, "UTF-16LE", "UTF-16LE", 1,
utf16LEBom, delimiter.getBytes("UTF-16LE"));
+ // test UTF-16BE have bom
+ testFileCharset(first, "UTF-16BE", "UTF-16", 1,
utf16BEBom, delimiter.getBytes("UTF-16BE"));
+ // test UTF-32LE without bom
+ testFileCharset(first, "UTF-32LE", "UTF-32LE", 0,
noBom, delimiter.getBytes("UTF-32LE"));
+ // test UTF-32BE without bom
+ testFileCharset(first, "UTF-32BE", "UTF-32BE", 0,
noBom, delimiter.getBytes("UTF-32BE"));
+ // test UTF-32LE have bom
+ testFileCharset(first, "UTF-32LE", "UTF-32LE", 0,
utf32LEBom, delimiter.getBytes("UTF-32LE"));
+ // test UTF-32BE have bom
+ testFileCharset(first, "UTF-32BE", "UTF-32", 0,
utf32BEBom, delimiter.getBytes("UTF-32BE"));
+ } catch (Throwable t) {
System.err.println("test failed with exception: " +
t.getMessage());
t.printStackTrace(System.err);
fail("Test erroneous");
}
}
+ /**
+ * Test different file encodings.
+ *
+ * @param data
+ * @param fileCharset File itself encoding
+ * @param targetCharset User specified code
+ * @param offset Return result offset
+ * @param bom Bom content
+ * @param delimiter
+ */
+ private void testFileCharset(String data, String fileCharset, String
targetCharset, int offset, byte[] bom, byte[] delimiter) {
+ BufferedWriter bw = null;
+ OutputStreamWriter osw = null;
+ FileOutputStream fos = null;
+ try {
+ // create input file
+ File tempFile =
File.createTempFile("TextInputFormatTest", "tmp");
+ tempFile.deleteOnExit();
+ tempFile.setWritable(true);
+// System.out.println(tempFile.toString());
+ fos = new FileOutputStream(tempFile, true);
+
+ // write UTF8 BOM mark if file is empty
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