43 lines
1.5 KiB
JavaScript
43 lines
1.5 KiB
JavaScript
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'use strict';
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const fs = require('fs');
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const assert = require('assert');
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const ref = require('../');
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describe('reinterpretUntilZeros()', function() {
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beforeEach(gc);
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it('should return a new Buffer instance up until the first 0', function() {
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const buf = Buffer.from('hello\0world');
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const buf2 = buf.reinterpretUntilZeros(1);
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assert.strictEqual(buf2.length, 'hello'.length);
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assert.strictEqual(buf2.toString(), 'hello');
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})
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it('should return a new Buffer instance up until the first 0 starting from offset', function() {
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const buf = Buffer.from('hello\0world');
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const buf2 = buf.reinterpretUntilZeros(1, 3);
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assert.strictEqual(buf2.length, 'lo'.length);
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assert.strictEqual(buf2.toString(), 'lo');
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})
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it('should return a new Buffer instance up until the first 2-byte sequence of 0s', function() {
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const str = 'hello world';
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const buf = Buffer.alloc(50);
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const len = buf.write(str, 'ucs2');
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buf.writeInt16LE(0, len); // NULL terminate the string
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const buf2 = buf.reinterpretUntilZeros(2);
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assert.strictEqual(str.length, buf2.length / 2);
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assert.strictEqual(buf2.toString('ucs2'), str);
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})
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it('should return a large Buffer instance > 10,000 bytes with UTF16-LE char bytes', function() {
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const data = fs.readFileSync(__dirname + '/utf16le.bin');
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const strBuf = ref.reinterpretUntilZeros(data, 2);
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assert(strBuf.length > 10000);
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const str = strBuf.toString('ucs2');
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// the data in `utf16le.bin` should be a JSON parsable string
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assert(JSON.parse(str));
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});
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});
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