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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
const common = require('../common');
const assert = require('assert');
const zero = [];
const one = [ Buffer.from('asdf') ];
const long = [];
for (let i = 0; i < 10; i++) long.push(Buffer.from('asdf'));
const flatZero = Buffer.concat(zero);
const flatOne = Buffer.concat(one);
const flatLong = Buffer.concat(long);
const flatLongLen = Buffer.concat(long, 40);
assert.strictEqual(flatZero.length, 0);
assert.strictEqual(flatOne.toString(), 'asdf');
const check = 'asdf'.repeat(10);
// A special case where concat used to return the first item,
// if the length is one. This check is to make sure that we don't do that.
assert.notStrictEqual(flatOne, one[0]);
assert.strictEqual(flatLong.toString(), check);
assert.strictEqual(flatLongLen.toString(), check);
[undefined, null, Buffer.from('hello')].forEach((value) => {
assert.throws(() => {
Buffer.concat(value);
}, {
code: 'ERR_INVALID_ARG_TYPE',
message: 'The "list" argument must be of type Array. ' +
`Received type ${typeof value}`
});
});
[[42], ['hello', Buffer.from('world')]].forEach((value) => {
assert.throws(() => {
Buffer.concat(value);
}, {
code: 'ERR_INVALID_ARG_TYPE',
message: 'The "list[0]" argument must be one of type Buffer ' +
`or Uint8Array. Received type ${typeof value[0]}`
});
});
assert.throws(() => {
Buffer.concat([Buffer.from('hello'), 3]);
}, {
code: 'ERR_INVALID_ARG_TYPE',
message: 'The "list[1]" argument must be one of type Buffer ' +
'or Uint8Array. Received type number'
});
// eslint-disable-next-line node-core/crypto-check
const random10 = common.hasCrypto ?
require('crypto').randomBytes(10) :
Buffer.alloc(10, 1);
const empty = Buffer.alloc(0);
assert.notDeepStrictEqual(random10, empty);
assert.notDeepStrictEqual(random10, Buffer.alloc(10));
assert.deepStrictEqual(Buffer.concat([], 100), empty);
assert.deepStrictEqual(Buffer.concat([random10], 0), empty);
assert.deepStrictEqual(Buffer.concat([random10], 10), random10);
assert.deepStrictEqual(Buffer.concat([random10, random10], 10), random10);
assert.deepStrictEqual(Buffer.concat([empty, random10]), random10);
assert.deepStrictEqual(Buffer.concat([random10, empty, empty]), random10);
// The tail should be zero-filled
assert.deepStrictEqual(Buffer.concat([empty], 100), Buffer.alloc(100));
assert.deepStrictEqual(Buffer.concat([empty], 4096), Buffer.alloc(4096));
assert.deepStrictEqual(
Buffer.concat([random10], 40),
Buffer.concat([random10, Buffer.alloc(30)]));
assert.deepStrictEqual(Buffer.concat([new Uint8Array([0x41, 0x42]),
new Uint8Array([0x43, 0x44])]),
Buffer.from('ABCD'));
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