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>
89 lines
2.4 KiB
JavaScript
89 lines
2.4 KiB
JavaScript
'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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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[0] = 23;
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data[1] = 23;
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data[2] = 23;
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data[3] = 23;
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ASSERT.equal(23, data.readUInt8(0));
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ASSERT.equal(23, data.readUInt8(1));
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ASSERT.equal(23, data.readUInt8(2));
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ASSERT.equal(23, data.readUInt8(3));
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data[0] = 255; /* If it became a signed int, would be -1 */
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ASSERT.equal(255, data.readUInt8(0));
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}
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/*
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* Test 16 bit unsigned integers. We need to verify the same set as 8 bit, only
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* now some of the issues actually matter:
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* - We are correctly resolving big endian
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* - Correctly resolving little endian
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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 test16(clazz) {
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var data = new clazz(4);
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data[0] = 0;
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data[1] = 0x23;
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data[2] = 0x42;
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data[3] = 0x3f;
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ASSERT.equal(0x23, data.readUInt16BE(0));
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ASSERT.equal(0x2342, data.readUInt16BE(1));
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ASSERT.equal(0x423f, data.readUInt16BE(2));
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ASSERT.equal(0x2300, data.readUInt16LE(0));
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ASSERT.equal(0x4223, data.readUInt16LE(1));
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ASSERT.equal(0x3f42, data.readUInt16LE(2));
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data[0] = 0xfe;
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data[1] = 0xfe;
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ASSERT.equal(0xfefe, data.readUInt16BE(0));
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ASSERT.equal(0xfefe, data.readUInt16LE(0));
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}
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/*
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* Test 32 bit unsigned integers. We need to verify the same set as 8 bit, only
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* now some of the issues actually matter:
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* - We are correctly resolving big endian
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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 test32(clazz) {
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var data = new clazz(8);
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data[0] = 0x32;
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data[1] = 0x65;
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data[2] = 0x42;
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data[3] = 0x56;
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data[4] = 0x23;
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data[5] = 0xff;
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ASSERT.equal(0x32654256, data.readUInt32BE(0));
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ASSERT.equal(0x65425623, data.readUInt32BE(1));
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ASSERT.equal(0x425623ff, data.readUInt32BE(2));
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ASSERT.equal(0x56426532, data.readUInt32LE(0));
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ASSERT.equal(0x23564265, data.readUInt32LE(1));
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ASSERT.equal(0xff235642, data.readUInt32LE(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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