Dive into secure and efficient coding practices with our curated list of the top 10 examples showcasing 'buffer' in functional components in JavaScript. Our advanced machine learning engine meticulously scans each line of code, cross-referencing millions of open source libraries to ensure your implementation is not just functional, but also robust and secure. Elevate your React applications to new heights by mastering the art of handling side effects, API calls, and asynchronous operations with confidence and precision.
socket.on('error', error)
socket.on('commandReceived', change)
const parser = (socket as any)._commandParser as CommandParser
expect(parser).toBeTruthy()
const parserSpy = jest.spyOn(parser, 'commandFromRawName')
expect(parser.version).toEqual(ProtocolVersion.V7_2) // Default
const expectedCmd1 = new ProgramInputUpdateCommand(0, { source: 0x0123 })
const expectedCmd2 = new PreviewInputUpdateCommand(1, { source: 0x0444 })
const testCmd1 = Buffer.from([0, 12, 0, 0, ...Buffer.from(ProgramInputUpdateCommand.rawName, 'ascii'), 0x00, 0x00, 0x01, 0x23])
const testCmd2 = Buffer.from([0, 12, 0, 0, ...Buffer.from(PreviewInputUpdateCommand.rawName, 'ascii'), 0x01, 0x00, 0x04, 0x44])
const pktId = 822
expect(AtemSocketChildSingleton.onCommandReceived).toBeDefined()
await AtemSocketChildSingleton.onCommandReceived!(Buffer.concat([testCmd1, testCmd2]), pktId)
await clock.tickAsync(0)
expect(connect).toHaveBeenCalledTimes(0)
expect(error).toHaveBeenCalledTimes(0)
expect(change).toHaveBeenCalledTimes(2)
expect(parserSpy).toHaveBeenCalledTimes(2)
expect(parserSpy).toHaveBeenCalledWith(ProgramInputUpdateCommand.rawName)
expect(parserSpy).toHaveBeenCalledWith(PreviewInputUpdateCommand.rawName)
// A change with the command
expect(change).toHaveBeenCalledWith(expectedCmd1)
expect(change).toHaveBeenCalledWith(expectedCmd2)
})
test('receive - empty buffer', async () => {
expected.slice(240, 300) + '\x03' +
expected.slice(300, 360);
b = new Buffer(expectedIllegal, 'base64');
assert.equal(quote.length, b.length);
assert.equal(quote, b.toString('ascii', 0, quote.length));
assert.equal(new Buffer('', 'base64').toString(), '');
assert.equal(new Buffer('K', 'base64').toString(), '');
// multiple-of-4 with padding
assert.equal(new Buffer('Kg==', 'base64').toString(), '*');
assert.equal(new Buffer('Kio=', 'base64').toString(), '**');
assert.equal(new Buffer('Kioq', 'base64').toString(), '***');
assert.equal(new Buffer('KioqKg==', 'base64').toString(), '****');
assert.equal(new Buffer('KioqKio=', 'base64').toString(), '*****');
assert.equal(new Buffer('KioqKioq', 'base64').toString(), '******');
assert.equal(new Buffer('KioqKioqKg==', 'base64').toString(), '*******');
assert.equal(new Buffer('KioqKioqKio=', 'base64').toString(), '********');
assert.equal(new Buffer('KioqKioqKioq', 'base64').toString(), '*********');
assert.equal(new Buffer('KioqKioqKioqKg==', 'base64').toString(),
'**********');
assert.equal(new Buffer('KioqKioqKioqKio=', 'base64').toString(),
'***********');
assert.equal(new Buffer('KioqKioqKioqKioq', 'base64').toString(),
'************');
assert.equal(new Buffer('KioqKioqKioqKioqKg==', 'base64').toString(),
'*************');
assert.equal(new Buffer('KioqKioqKioqKioqKio=', 'base64').toString(),
'**************');
assert.equal(new Buffer('KioqKioqKioqKioqKioq', 'base64').toString(),
'***************');
}).on('end', () => {
res.end('You posted me this: ' + Buffer.concat(body).toString());
});
// handle some GET url
'should return the entire image': function (err, value) {
var paths = [ "sample.png", "test/sample.png" ],
path = paths.shift();
while (true) {
try {
var fileContents = fs.readFileSync(path, 'binary');
break;
} catch (e) {
path = paths.shift();
}
}
var imageBuffer = new Buffer(Buffer.byteLength(fileContents, 'binary'));
imageBuffer.write(fileContents, 0, "binary");
// TODO Make value binary a Buffer vs the current binary string?
assert.equal(value, imageBuffer.toString("binary"));
}
}
(function() {
var buf = new Buffer('0123456789');
assert.equal(buf.slice(-10, 10), '0123456789');
assert.equal(buf.slice(-20, 10), '0123456789');
assert.equal(buf.slice(-20, -10), '');
assert.equal(buf.slice(0, -1), '012345678');
assert.equal(buf.slice(2, -2), '234567');
assert.equal(buf.slice(0, 65536), '0123456789');
assert.equal(buf.slice(65536, 0), '');
for (var i = 0, s = buf.toString(); i < buf.length; ++i) {
assert.equal(buf.slice(-i), s.slice(-i));
assert.equal(buf.slice(0, -i), s.slice(0, -i));
}
// try to slice a zero length Buffer
// see https://github.com/joyent/node/issues/5881
SlowBuffer(0).slice(0, 1);
// make sure a zero length slice doesn't set the .parent attribute
assert.equal(Buffer(5).slice(0,0).parent, undefined);
// and make sure a proper slice does have a parent
assert.ok(typeof Buffer(5).slice(0, 5).parent === 'object');
})();
assert.strictEqual(sb.buffer.byteLength, 4);
// should work without new
sb = SlowBuffer(4);
assert(sb instanceof Buffer);
assert.strictEqual(sb.length, 4);
sb.fill(1);
for (const [key, value] of sb.entries()) {
assert.deepStrictEqual(value, ones[key]);
}
// should work with edge cases
assert.strictEqual(SlowBuffer(0).length, 0);
try {
assert.strictEqual(
SlowBuffer(buffer.kMaxLength).length, buffer.kMaxLength);
} catch (e) {
assert.equal(e.message, common.engineSpecificMessage({
v8: 'Array buffer allocation failed',
chakracore: 'Invalid offset/length when creating typed array'
}));
}
// should work with number-coercible values
assert.strictEqual(SlowBuffer('6').length, 6);
assert.strictEqual(SlowBuffer(true).length, 1);
// should create zero-length buffer if parameter is not a number
assert.strictEqual(SlowBuffer().length, 0);
assert.strictEqual(SlowBuffer(NaN).length, 0);
assert.strictEqual(SlowBuffer({}).length, 0);
assert.strictEqual(SlowBuffer('string').length, 0);
'use strict';
const common = require('../common');
const assert = require('assert');
const buffer = require('buffer');
const SlowBuffer = buffer.SlowBuffer;
const kMaxLength = buffer.kMaxLength;
const bufferMaxSizeMsg = common.bufferMaxSizeMsg;
assert.throws(() => Buffer((-1 >>> 0) + 1), bufferMaxSizeMsg);
assert.throws(() => SlowBuffer((-1 >>> 0) + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.alloc((-1 >>> 0) + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.allocUnsafe((-1 >>> 0) + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.allocUnsafeSlow((-1 >>> 0) + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer(kMaxLength + 1), bufferMaxSizeMsg);
assert.throws(() => SlowBuffer(kMaxLength + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.alloc(kMaxLength + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.allocUnsafe(kMaxLength + 1), bufferMaxSizeMsg);
assert.throws(() => Buffer.allocUnsafeSlow(kMaxLength + 1), bufferMaxSizeMsg);
// issue GH-4331
assert.throws(() => Buffer.allocUnsafe(0xFFFFFFFF), bufferMaxSizeMsg);
in: [tmpDir + 'test64m.bin'],
blockSize: 1048576,
blocks: 0,
singleFile: true
},
{
in: [tmpDir + 'test65k.bin'],
blockSize: 1048576,
blocks: 0,
singleFile: true
},*/
// 2x large block size test
{
in: [tmpDir + 'test64m.bin'],
blockSize: Math.floor((require('buffer').kMaxLength || (1024*1024*1024-1))/4)*4 - 192, // max allowable buffer size test
blocks: 1,
memory: process.arch == 'x64' ? '2.5g' : '1.5g',
singleFile: true
},
{
in: [tmpDir + 'test64m.bin'],
blockSize: 4294967296, // 4GB, should exceed node's limit
blocks: 2,
memory: '511m',
singleFile: true
},
{ // max number of blocks test
in: [tmpDir + 'test64m.bin'],
blockSize: 2048,
blocks: 32768, // max allowed by par2cmdline; TODO: test w/ 65536
singleFile: true
assert.deepStrictEqual(
buffer.transcode(Buffer.from('hi', 'ascii'), 'ascii', 'utf16le'),
Buffer.from('hi', 'utf16le'));
assert.deepStrictEqual(
buffer.transcode(Buffer.from('hi', 'latin1'), 'latin1', 'utf16le'),
Buffer.from('hi', 'utf16le'));
assert.deepStrictEqual(
buffer.transcode(Buffer.from('hä', 'latin1'), 'latin1', 'utf16le'),
Buffer.from('hä', 'utf16le'));
// Test that Uint8Array arguments are okay.
{
const uint8array = new Uint8Array([...Buffer.from('hä', 'latin1')]);
assert.deepStrictEqual(
buffer.transcode(uint8array, 'latin1', 'utf16le'),
Buffer.from('hä', 'utf16le'));
}
{
const dest = buffer.transcode(new Uint8Array(), 'utf8', 'latin1');
assert.strictEqual(dest.length, 0);
}
buffer.transcode(Buffer.from('hi', 'latin1'), 'latin1', 'utf16le'),
Buffer.from('hi', 'utf16le'));
assert.deepStrictEqual(
buffer.transcode(Buffer.from('hä', 'latin1'), 'latin1', 'utf16le'),
Buffer.from('hä', 'utf16le'));
// Test that Uint8Array arguments are okay.
{
const uint8array = new Uint8Array([...Buffer.from('hä', 'latin1')]);
assert.deepStrictEqual(
buffer.transcode(uint8array, 'latin1', 'utf16le'),
Buffer.from('hä', 'utf16le'));
}
{
const dest = buffer.transcode(new Uint8Array(), 'utf8', 'latin1');
assert.strictEqual(dest.length, 0);
}