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53 lines
1.3 KiB
53 lines
1.3 KiB
'use strict';
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require('../common');
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const assert = require('assert');
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const Buffer = require('buffer').Buffer;
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const LENGTH = 16;
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const ab = new ArrayBuffer(LENGTH);
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const dv = new DataView(ab);
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const ui = new Uint8Array(ab);
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const buf = new Buffer(ab);
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assert.ok(buf instanceof Buffer);
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// For backwards compatibility of old .parent property test that if buf is not
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// a slice then .parent should be undefined.
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assert.equal(buf.parent, undefined);
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assert.equal(buf.buffer, ab);
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assert.equal(buf.length, ab.byteLength);
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buf.fill(0xC);
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for (let i = 0; i < LENGTH; i++) {
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assert.equal(ui[i], 0xC);
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ui[i] = 0xF;
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assert.equal(buf[i], 0xF);
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}
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buf.writeUInt32LE(0xF00, 0);
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buf.writeUInt32BE(0xB47, 4);
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buf.writeDoubleLE(3.1415, 8);
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assert.equal(dv.getUint32(0, true), 0xF00);
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assert.equal(dv.getUint32(4), 0xB47);
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assert.equal(dv.getFloat64(8, true), 3.1415);
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// Now test protecting users from doing stupid things
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assert.throws(function() {
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function AB() { }
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Object.setPrototypeOf(AB, ArrayBuffer);
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Object.setPrototypeOf(AB.prototype, ArrayBuffer.prototype);
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new Buffer(new AB());
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}, TypeError);
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// write{Double,Float}{LE,BE} with noAssert should not crash, cf. #3766
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var b = new Buffer(1);
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b.writeFloatLE(11.11, 0, true);
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b.writeFloatBE(11.11, 0, true);
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b.writeDoubleLE(11.11, 0, true);
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b.writeDoubleBE(11.11, 0, true);
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