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91 lines
2.4 KiB
91 lines
2.4 KiB
/*
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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(4);
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buffer.writeInt8(0x23, 0, 'big');
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buffer.writeInt8(0x23, 1, 'little');
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buffer.writeInt8(-5, 2, 'big');
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buffer.writeInt8(-5, 3, 'little');
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ASSERT.equal(0x23, buffer[0]);
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ASSERT.equal(0x23, buffer[1]);
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ASSERT.equal(0xfb, buffer[2]);
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ASSERT.equal(0xfb, buffer[3]);
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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, 'big');
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});
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ASSERT.throws(function() {
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buffer.writeInt8(0xabc, 0, 'little');
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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.writeInt16(0x0023, 0, 'big');
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buffer.writeInt16(0x0023, 2, 'little');
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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.writeInt16(-5, 0, 'big');
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buffer.writeInt16(-5, 2, 'little');
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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.writeInt16(-1679, 1, 'big');
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buffer.writeInt16(-1679, 3, 'little');
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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.writeInt32(0x23, 0, 'big');
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buffer.writeInt32(0x23, 4, 'little');
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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.writeInt32(-5, 0, 'big');
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buffer.writeInt32(-5, 4, 'little');
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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.writeInt32(-805306713, 0, 'big');
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buffer.writeInt32(-805306713, 4, 'little');
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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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