api-basics.any.js (2064B)
1 // META: global=window,dedicatedworker,shadowrealm 2 // META: title=Encoding API: Basics 3 4 test(function() { 5 assert_equals((new TextEncoder).encoding, 'utf-8', 'default encoding is utf-8'); 6 assert_equals((new TextDecoder).encoding, 'utf-8', 'default encoding is utf-8'); 7 }, 'Default encodings'); 8 9 test(function() { 10 assert_array_equals(new TextEncoder().encode(), [], 'input default should be empty string') 11 assert_array_equals(new TextEncoder().encode(undefined), [], 'input default should be empty string') 12 }, 'Default inputs'); 13 14 15 function testDecodeSample(encoding, string, bytes) { 16 test(function() { 17 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes)), string); 18 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer), string); 19 }, 'Decode sample: ' + encoding); 20 } 21 22 // z (ASCII U+007A), cent (Latin-1 U+00A2), CJK water (BMP U+6C34), 23 // G-Clef (non-BMP U+1D11E), PUA (BMP U+F8FF), PUA (non-BMP U+10FFFD) 24 // byte-swapped BOM (non-character U+FFFE) 25 var sample = 'z\xA2\u6C34\uD834\uDD1E\uF8FF\uDBFF\uDFFD\uFFFE'; 26 27 test(function() { 28 var encoding = 'utf-8'; 29 var string = sample; 30 var bytes = [0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4, 0xF0, 0x9D, 0x84, 0x9E, 0xEF, 0xA3, 0xBF, 0xF4, 0x8F, 0xBF, 0xBD, 0xEF, 0xBF, 0xBE]; 31 var encoded = new TextEncoder().encode(string); 32 assert_array_equals([].slice.call(encoded), bytes); 33 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes)), string); 34 assert_equals(new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer), string); 35 }, 'Encode/decode round trip: utf-8'); 36 37 testDecodeSample( 38 'utf-16le', 39 sample, 40 [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8, 0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF] 41 ); 42 43 testDecodeSample( 44 'utf-16be', 45 sample, 46 [0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34, 0xD8, 0x34, 0xDD, 0x1E, 0xF8, 0xFF, 0xDB, 0xFF, 0xDF, 0xFD, 0xFF, 0xFE] 47 ); 48 49 testDecodeSample( 50 'utf-16', 51 sample, 52 [0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C, 0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8, 0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF] 53 );