1// META: title=Encoding API: Basics 2 3test(function() { 4 assert_equals((new TextEncoder).encoding, 'utf-8', 'default encoding is utf-8'); 5 assert_equals((new TextDecoder).encoding, 'utf-8', 'default encoding is utf-8'); 6}, 'Default encodings'); 7 8test(function() { 9 assert_array_equals(new TextEncoder().encode(), [], 'input default should be empty string') 10 assert_array_equals(new TextEncoder().encode(undefined), [], 'input default should be empty string') 11}, 'Default inputs'); 12 13 14function testDecodeSample(encoding, string, bytes) { 15 test(function() { 16 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes)), string); 17 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer), string); 18 }, 'Decode sample: ' + encoding); 19} 20 21// z (ASCII U+007A), cent (Latin-1 U+00A2), CJK water (BMP U+6C34), 22// G-Clef (non-BMP U+1D11E), PUA (BMP U+F8FF), PUA (non-BMP U+10FFFD) 23// byte-swapped BOM (non-character U+FFFE) 24var sample = 'z\xA2\u6C34\uD834\uDD1E\uF8FF\uDBFF\uDFFD\uFFFE'; 25 26test(function() { 27 var encoding = 'utf-8'; 28 var string = sample; 29 var bytes = [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xEF, 0xA3, 0xBF, 0xF4, 0x8F, 0xBF, 0xBD, 0xEF, 0xBF, 0xBE]; 30 var encoded = new TextEncoder().encode(string); 31 assert_array_equals([].slice.call(encoded), bytes); 32 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes)), string); 33 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer), string); 34}, 'Encode/decode round trip: utf-8'); 35 36testDecodeSample( 37 'utf-16le', 38 sample, 39 [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8, 0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF] 40); 41 42testDecodeSample( 43 'utf-16be', 44 sample, 45 [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xF8, 0xFF, 0xDB, 0xFF, 0xDF, 0xFD, 0xFF, 0xFE] 46); 47 48testDecodeSample( 49 'utf-16', 50 sample, 51 [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8, 0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF] 52); 53