| Andrew Top | 61a8495 | 2019-04-30 15:07:33 -0700 | [diff] [blame] | 1 | <!DOCTYPE html> |
| 2 | <title>Encoding API: Byte-order marks</title> |
| 3 | <script src="/resources/testharness.js"></script> |
| 4 | <script src="/resources/testharnessreport.js"></script> |
| 5 | <script> |
| 6 | |
| 7 | var testCases = [ |
| 8 | { |
| 9 | encoding: 'utf-8', |
| 10 | bom: [0xEF, 0xBB, 0xBF], |
| 11 | bytes: [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xF4, 0x8F, 0xBF, 0xBD] |
| 12 | }, |
| 13 | { |
| 14 | encoding: 'utf-16le', |
| 15 | bom: [0xff, 0xfe], |
| 16 | bytes: [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xDB, 0xFD, 0xDF] |
| 17 | }, |
| 18 | { |
| 19 | encoding: 'utf-16be', |
| 20 | bom: [0xfe, 0xff], |
| 21 | bytes: [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xDB, 0xFF, 0xDF, 0xFD] |
| 22 | } |
| 23 | ]; |
| 24 | |
| 25 | var string = 'z\xA2\u6C34\uD834\uDD1E\uDBFF\uDFFD'; // z, cent, CJK water, G-Clef, Private-use character |
| 26 | |
| 27 | testCases.forEach(function(t) { |
| 28 | test(function() { |
| 29 | |
| 30 | var decoder = new TextDecoder(t.encoding); |
| 31 | assert_equals(decoder.decode(new Uint8Array(t.bytes)), string, |
| 32 | 'Sequence without BOM should decode successfully'); |
| 33 | |
| 34 | assert_equals(decoder.decode(new Uint8Array(t.bom.concat(t.bytes))), string, |
| 35 | 'Sequence with BOM should decode successfully (with no BOM present in output)'); |
| 36 | |
| 37 | testCases.forEach(function(o) { |
| 38 | if (o === t) |
| 39 | return; |
| 40 | |
| 41 | assert_not_equals(decoder.decode(new Uint8Array(o.bom.concat(t.bytes))), string, |
| 42 | 'Mismatching BOM should not be ignored - treated as garbage bytes.'); |
| 43 | }); |
| 44 | |
| 45 | }, 'Byte-order marks: ' + t.encoding); |
| 46 | }); |
| 47 | |
| 48 | </script> |
