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127 lines
2.9 KiB
127 lines
2.9 KiB
'use strict';
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/*
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* A battery of tests to help us read a series of uints
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*/
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var common = require('../common');
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var ASSERT = require('assert');
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/*
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* We need to check the following things:
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* - We are correctly resolving big endian (doesn't mean anything for 8 bit)
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* - Correctly resolving little endian (doesn't mean anything for 8 bit)
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* - Correctly using the offsets
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* - Correctly interpreting values that are beyond the signed range as unsigned
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*/
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function test8(clazz) {
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var data = new clazz(4);
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data.writeUInt8(23, 0);
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data.writeUInt8(23, 1);
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data.writeUInt8(23, 2);
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data.writeUInt8(23, 3);
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ASSERT.equal(23, data[0]);
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ASSERT.equal(23, data[1]);
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ASSERT.equal(23, data[2]);
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ASSERT.equal(23, data[3]);
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data.writeUInt8(23, 0);
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data.writeUInt8(23, 1);
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data.writeUInt8(23, 2);
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data.writeUInt8(23, 3);
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ASSERT.equal(23, data[0]);
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ASSERT.equal(23, data[1]);
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ASSERT.equal(23, data[2]);
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ASSERT.equal(23, data[3]);
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data.writeUInt8(255, 0);
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ASSERT.equal(255, data[0]);
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data.writeUInt8(255, 0);
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ASSERT.equal(255, data[0]);
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}
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function test16(clazz) {
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var value = 0x2343;
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var data = new clazz(4);
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data.writeUInt16BE(value, 0);
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ASSERT.equal(0x23, data[0]);
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ASSERT.equal(0x43, data[1]);
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data.writeUInt16BE(value, 1);
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ASSERT.equal(0x23, data[1]);
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ASSERT.equal(0x43, data[2]);
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data.writeUInt16BE(value, 2);
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ASSERT.equal(0x23, data[2]);
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ASSERT.equal(0x43, data[3]);
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data.writeUInt16LE(value, 0);
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ASSERT.equal(0x23, data[1]);
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ASSERT.equal(0x43, data[0]);
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data.writeUInt16LE(value, 1);
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ASSERT.equal(0x23, data[2]);
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ASSERT.equal(0x43, data[1]);
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data.writeUInt16LE(value, 2);
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ASSERT.equal(0x23, data[3]);
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ASSERT.equal(0x43, data[2]);
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value = 0xff80;
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data.writeUInt16LE(value, 0);
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ASSERT.equal(0xff, data[1]);
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ASSERT.equal(0x80, data[0]);
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data.writeUInt16BE(value, 0);
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ASSERT.equal(0xff, data[0]);
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ASSERT.equal(0x80, data[1]);
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}
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function test32(clazz) {
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var data = new clazz(6);
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var value = 0xe7f90a6d;
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data.writeUInt32BE(value, 0);
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ASSERT.equal(0xe7, data[0]);
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ASSERT.equal(0xf9, data[1]);
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ASSERT.equal(0x0a, data[2]);
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ASSERT.equal(0x6d, data[3]);
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data.writeUInt32BE(value, 1);
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ASSERT.equal(0xe7, data[1]);
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ASSERT.equal(0xf9, data[2]);
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ASSERT.equal(0x0a, data[3]);
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ASSERT.equal(0x6d, data[4]);
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data.writeUInt32BE(value, 2);
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ASSERT.equal(0xe7, data[2]);
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ASSERT.equal(0xf9, data[3]);
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ASSERT.equal(0x0a, data[4]);
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ASSERT.equal(0x6d, data[5]);
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data.writeUInt32LE(value, 0);
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ASSERT.equal(0xe7, data[3]);
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ASSERT.equal(0xf9, data[2]);
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ASSERT.equal(0x0a, data[1]);
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ASSERT.equal(0x6d, data[0]);
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data.writeUInt32LE(value, 1);
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ASSERT.equal(0xe7, data[4]);
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ASSERT.equal(0xf9, data[3]);
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ASSERT.equal(0x0a, data[2]);
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ASSERT.equal(0x6d, data[1]);
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data.writeUInt32LE(value, 2);
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ASSERT.equal(0xe7, data[5]);
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ASSERT.equal(0xf9, data[4]);
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ASSERT.equal(0x0a, data[3]);
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ASSERT.equal(0x6d, data[2]);
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}
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test8(Buffer);
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test16(Buffer);
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test32(Buffer);
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