You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
112 lines
2.7 KiB
112 lines
2.7 KiB
'use strict';
|
|
var Buffer = require('../../').Buffer;
|
|
|
|
|
|
|
|
var assert = require('assert');
|
|
|
|
var Buffer = require('../../').Buffer;
|
|
var LENGTH = 16;
|
|
|
|
var ab = new ArrayBuffer(LENGTH);
|
|
var dv = new DataView(ab);
|
|
var ui = new Uint8Array(ab);
|
|
var buf = Buffer.from(ab);
|
|
|
|
|
|
assert.ok(buf instanceof Buffer);
|
|
// For backwards compatibility of old .parent property test that if buf is not
|
|
// a slice then .parent should be undefined.
|
|
assert.equal(buf.parent, undefined);
|
|
assert.equal(buf.buffer, ab);
|
|
assert.equal(buf.length, ab.byteLength);
|
|
|
|
|
|
buf.fill(0xC);
|
|
for (var i = 0; i < LENGTH; i++) {
|
|
assert.equal(ui[i], 0xC);
|
|
ui[i] = 0xF;
|
|
assert.equal(buf[i], 0xF);
|
|
}
|
|
|
|
buf.writeUInt32LE(0xF00, 0);
|
|
buf.writeUInt32BE(0xB47, 4);
|
|
buf.writeDoubleLE(3.1415, 8);
|
|
|
|
assert.equal(dv.getUint32(0, true), 0xF00);
|
|
assert.equal(dv.getUint32(4), 0xB47);
|
|
assert.equal(dv.getFloat64(8, true), 3.1415);
|
|
|
|
|
|
// Now test protecting users from doing stupid things
|
|
|
|
assert.throws(function() {
|
|
function AB() { }
|
|
Object.setPrototypeOf(AB, ArrayBuffer);
|
|
Object.setPrototypeOf(AB.prototype, ArrayBuffer.prototype);
|
|
Buffer.from(new AB());
|
|
}, TypeError);
|
|
|
|
// write{Double,Float}{LE,BE} with noAssert should not crash, cf. #3766
|
|
var b = Buffer.allocUnsafe(1);
|
|
b.writeFloatLE(11.11, 0, true);
|
|
b.writeFloatBE(11.11, 0, true);
|
|
b.writeDoubleLE(11.11, 0, true);
|
|
b.writeDoubleBE(11.11, 0, true);
|
|
|
|
// Test the byteOffset and length arguments
|
|
{
|
|
var ab = new Uint8Array(5);
|
|
ab[0] = 1;
|
|
ab[1] = 2;
|
|
ab[2] = 3;
|
|
ab[3] = 4;
|
|
ab[4] = 5;
|
|
var buf = Buffer.from(ab.buffer, 1, 3);
|
|
assert.equal(buf.length, 3);
|
|
assert.equal(buf[0], 2);
|
|
assert.equal(buf[1], 3);
|
|
assert.equal(buf[2], 4);
|
|
buf[0] = 9;
|
|
assert.equal(ab[1], 9);
|
|
|
|
assert.throws(() => Buffer.from(ab.buffer, 6), (err) => {
|
|
assert(err instanceof RangeError);
|
|
assert(/'offset' is out of bounds/.test(err.message));
|
|
return true;
|
|
});
|
|
assert.throws(() => Buffer.from(ab.buffer, 3, 6), (err) => {
|
|
assert(err instanceof RangeError);
|
|
assert(/'length' is out of bounds/.test(err.message));
|
|
return true;
|
|
});
|
|
}
|
|
|
|
// Test the deprecated Buffer() version also
|
|
{
|
|
var ab = new Uint8Array(5);
|
|
ab[0] = 1;
|
|
ab[1] = 2;
|
|
ab[2] = 3;
|
|
ab[3] = 4;
|
|
ab[4] = 5;
|
|
var buf = Buffer(ab.buffer, 1, 3);
|
|
assert.equal(buf.length, 3);
|
|
assert.equal(buf[0], 2);
|
|
assert.equal(buf[1], 3);
|
|
assert.equal(buf[2], 4);
|
|
buf[0] = 9;
|
|
assert.equal(ab[1], 9);
|
|
|
|
assert.throws(() => Buffer(ab.buffer, 6), (err) => {
|
|
assert(err instanceof RangeError);
|
|
assert(/'offset' is out of bounds/.test(err.message));
|
|
return true;
|
|
});
|
|
assert.throws(() => Buffer(ab.buffer, 3, 6), (err) => {
|
|
assert(err instanceof RangeError);
|
|
assert(/'length' is out of bounds/.test(err.message));
|
|
return true;
|
|
});
|
|
}
|
|
|