mirror of
https://github.com/nodejs/node.git
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92 lines
2.1 KiB
JavaScript
92 lines
2.1 KiB
JavaScript
/*
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* Tests to verify we're writing signed integers correctly
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*/
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var ASSERT = require('assert');
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function test8() {
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var buffer = new Buffer(2);
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buffer.writeInt8(0x23, 0);
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buffer.writeInt8(-5, 1);
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ASSERT.equal(0x23, buffer[0]);
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ASSERT.equal(0xfb, buffer[1]);
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/* Make sure we handle truncation correctly */
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ASSERT.throws(function() {
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buffer.writeInt8(0xabc, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt8(0xabc, 0);
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});
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}
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function test16() {
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var buffer = new Buffer(6);
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buffer.writeInt16BE(0x0023, 0);
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buffer.writeInt16LE(0x0023, 2);
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ASSERT.equal(0x00, buffer[0]);
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ASSERT.equal(0x23, buffer[1]);
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ASSERT.equal(0x23, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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buffer.writeInt16BE(-5, 0);
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buffer.writeInt16LE(-5, 2);
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ASSERT.equal(0xff, buffer[0]);
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ASSERT.equal(0xfb, buffer[1]);
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ASSERT.equal(0xfb, buffer[2]);
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ASSERT.equal(0xff, buffer[3]);
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buffer.writeInt16BE(-1679, 1);
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buffer.writeInt16LE(-1679, 3);
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ASSERT.equal(0xf9, buffer[1]);
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ASSERT.equal(0x71, buffer[2]);
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ASSERT.equal(0x71, buffer[3]);
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ASSERT.equal(0xf9, buffer[4]);
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}
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function test32() {
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var buffer = new Buffer(8);
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buffer.writeInt32BE(0x23, 0);
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buffer.writeInt32LE(0x23, 4);
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ASSERT.equal(0x00, buffer[0]);
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ASSERT.equal(0x00, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x23, buffer[3]);
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ASSERT.equal(0x23, buffer[4]);
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ASSERT.equal(0x00, buffer[5]);
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ASSERT.equal(0x00, buffer[6]);
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ASSERT.equal(0x00, buffer[7]);
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buffer.writeInt32BE(-5, 0);
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buffer.writeInt32LE(-5, 4);
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ASSERT.equal(0xff, buffer[0]);
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ASSERT.equal(0xff, buffer[1]);
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ASSERT.equal(0xff, buffer[2]);
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ASSERT.equal(0xfb, buffer[3]);
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ASSERT.equal(0xfb, buffer[4]);
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ASSERT.equal(0xff, buffer[5]);
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ASSERT.equal(0xff, buffer[6]);
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ASSERT.equal(0xff, buffer[7]);
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buffer.writeInt32BE(-805306713, 0);
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buffer.writeInt32LE(-805306713, 4);
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ASSERT.equal(0xcf, buffer[0]);
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ASSERT.equal(0xff, buffer[1]);
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ASSERT.equal(0xfe, buffer[2]);
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ASSERT.equal(0xa7, buffer[3]);
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ASSERT.equal(0xa7, buffer[4]);
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ASSERT.equal(0xfe, buffer[5]);
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ASSERT.equal(0xff, buffer[6]);
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ASSERT.equal(0xcf, buffer[7]);
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}
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test8();
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test16();
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test32();
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