d795301025
common.js needs to be loaded in all tests so that there is checking for variable leaks and possibly other things. However, it does not need to be assigned to a variable if nothing in common.js is referred to elsewhere in the test. The main tradeoff for this bit of code churn is that it gets the code base most of the way to being able to enable the no-unused-vars rule in eslint. (The non-tooling benefit is that it lessens cognitive load when reading tests as it is an immediate indication that none of the functions or properties in common.js will be used by the test.) PR-URL: https://github.com/nodejs/node/pull/4563 Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
168 lines
4.3 KiB
JavaScript
168 lines
4.3 KiB
JavaScript
'use strict';
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/*
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* Tests to verify we're writing signed integers correctly
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*/
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require('../common');
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var ASSERT = require('assert');
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function test8(clazz) {
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var buffer = new clazz(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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/* Make sure we handle min/max correctly */
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buffer.writeInt8(0x7f, 0);
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buffer.writeInt8(-0x80, 1);
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ASSERT.equal(0x7f, buffer[0]);
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ASSERT.equal(0x80, buffer[1]);
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ASSERT.throws(function() {
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buffer.writeInt8(0x7f + 1, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt8(-0x80 - 1, 0);
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});
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}
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function test16(clazz) {
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var buffer = new clazz(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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/* Make sure we handle min/max correctly */
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buffer.writeInt16BE(0x7fff, 0);
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buffer.writeInt16BE(-0x8000, 2);
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ASSERT.equal(0x7f, buffer[0]);
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ASSERT.equal(0xff, buffer[1]);
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ASSERT.equal(0x80, buffer[2]);
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ASSERT.equal(0x00, buffer[3]);
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ASSERT.throws(function() {
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buffer.writeInt16BE(0x7fff + 1, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt16BE(-0x8000 - 1, 0);
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});
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buffer.writeInt16LE(0x7fff, 0);
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buffer.writeInt16LE(-0x8000, 2);
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ASSERT.equal(0xff, buffer[0]);
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ASSERT.equal(0x7f, buffer[1]);
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ASSERT.equal(0x00, buffer[2]);
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ASSERT.equal(0x80, buffer[3]);
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ASSERT.throws(function() {
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buffer.writeInt16LE(0x7fff + 1, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt16LE(-0x8000 - 1, 0);
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});
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}
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function test32(clazz) {
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var buffer = new clazz(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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/* Make sure we handle min/max correctly */
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buffer.writeInt32BE(0x7fffffff, 0);
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buffer.writeInt32BE(-0x80000000, 4);
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ASSERT.equal(0x7f, 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(0xff, buffer[3]);
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ASSERT.equal(0x80, 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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ASSERT.throws(function() {
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buffer.writeInt32BE(0x7fffffff + 1, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt32BE(-0x80000000 - 1, 0);
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});
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buffer.writeInt32LE(0x7fffffff, 0);
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buffer.writeInt32LE(-0x80000000, 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(0x7f, buffer[3]);
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ASSERT.equal(0x00, 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(0x80, buffer[7]);
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ASSERT.throws(function() {
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buffer.writeInt32LE(0x7fffffff + 1, 0);
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});
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ASSERT.throws(function() {
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buffer.writeInt32LE(-0x80000000 - 1, 0);
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});
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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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