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66 lines
1.9 KiB
JavaScript
66 lines
1.9 KiB
JavaScript
common = require('../common');
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assert = common.assert;
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Buffer = require('buffer').Buffer;
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StringDecoder = require('string_decoder').StringDecoder;
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decoder = new StringDecoder('utf8');
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buffer = new Buffer('$');
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assert.deepEqual('$', decoder.write(buffer));
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buffer = new Buffer('¢');
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assert.deepEqual('', decoder.write(buffer.slice(0, 1)));
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assert.deepEqual('¢', decoder.write(buffer.slice(1, 2)));
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buffer = new Buffer('€');
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assert.deepEqual('', decoder.write(buffer.slice(0, 1)));
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assert.deepEqual('', decoder.write(buffer.slice(1, 2)));
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assert.deepEqual('€', decoder.write(buffer.slice(2, 3)));
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buffer = new Buffer([0xF0, 0xA4, 0xAD, 0xA2]);
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s = '';
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s += decoder.write(buffer.slice(0, 1));
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s += decoder.write(buffer.slice(1, 2));
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s += decoder.write(buffer.slice(2, 3));
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s += decoder.write(buffer.slice(3, 4));
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assert.ok(s.length > 0);
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// A mixed ascii and non-ascii string
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// Test stolen from deps/v8/test/cctest/test-strings.cc
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// U+02E4 -> CB A4
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// U+0064 -> 64
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// U+12E4 -> E1 8B A4
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// U+0030 -> 30
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// U+3045 -> E3 81 85
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expected = '\u02e4\u0064\u12e4\u0030\u3045';
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buffer = new Buffer([0xCB, 0xA4, 0x64, 0xE1, 0x8B, 0xA4,
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0x30, 0xE3, 0x81, 0x85]);
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charLengths = [0, 0, 1, 2, 2, 2, 3, 4, 4, 4, 5, 5];
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// Split the buffer into 3 segments
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// |----|------|-------|
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// 0 i j buffer.length
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// Scan through every possible 3 segment combination
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// and make sure that the string is always parsed.
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common.print('scanning ');
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for (var j = 2; j < buffer.length; j++) {
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for (var i = 1; i < j; i++) {
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var decoder = new StringDecoder('utf8');
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var sum = decoder.write(buffer.slice(0, i));
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// just check that we've received the right amount
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// after the first write
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assert.equal(charLengths[i], sum.length);
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sum += decoder.write(buffer.slice(i, j));
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sum += decoder.write(buffer.slice(j, buffer.length));
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assert.equal(expected, sum);
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common.print('.');
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}
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}
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console.log(' crayon!');
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