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966e5cfb81
This is to be consistent with the other operators and helps understanding the context when the code is grepped. PR-URL: https://github.com/nodejs/node/pull/10213 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com> Reviewed-By: Teddy Katz <teddy.katz@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com>
68 lines
2.3 KiB
JavaScript
68 lines
2.3 KiB
JavaScript
'use strict';
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const common = require('../common');
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const assert = require('assert');
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const zero = [];
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const one = [ Buffer.from('asdf') ];
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const long = [];
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for (var i = 0; i < 10; i++) long.push(Buffer.from('asdf'));
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const flatZero = Buffer.concat(zero);
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const flatOne = Buffer.concat(one);
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const flatLong = Buffer.concat(long);
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const flatLongLen = Buffer.concat(long, 40);
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assert.strictEqual(flatZero.length, 0);
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assert.strictEqual(flatOne.toString(), 'asdf');
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const check = new Array(10 + 1).join('asdf');
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// A special case where concat used to return the first item,
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// if the length is one. This check is to make sure that we don't do that.
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assert.notStrictEqual(flatOne, one[0]);
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assert.strictEqual(flatLong.toString(), check);
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assert.strictEqual(flatLongLen.toString(), check);
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assertWrongList();
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assertWrongList(null);
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assertWrongList(Buffer.from('hello'));
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assertWrongList([42]);
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assertWrongList(['hello', 'world']);
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assertWrongList(['hello', Buffer.from('world')]);
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function assertWrongList(value) {
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assert.throws(() => {
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Buffer.concat(value);
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}, function(err) {
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return err instanceof TypeError &&
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err.message === '"list" argument must be an Array of Buffer ' +
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'or Uint8Array instances';
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});
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}
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const random10 = common.hasCrypto ?
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require('crypto').randomBytes(10) :
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Buffer.alloc(10, 1);
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const empty = Buffer.alloc(0);
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assert.notDeepStrictEqual(random10, empty);
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assert.notDeepStrictEqual(random10, Buffer.alloc(10));
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assert.deepStrictEqual(Buffer.concat([], 100), empty);
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assert.deepStrictEqual(Buffer.concat([random10], 0), empty);
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assert.deepStrictEqual(Buffer.concat([random10], 10), random10);
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assert.deepStrictEqual(Buffer.concat([random10, random10], 10), random10);
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assert.deepStrictEqual(Buffer.concat([empty, random10]), random10);
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assert.deepStrictEqual(Buffer.concat([random10, empty, empty]), random10);
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// The tail should be zero-filled
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assert.deepStrictEqual(Buffer.concat([empty], 100), Buffer.alloc(100));
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assert.deepStrictEqual(Buffer.concat([empty], 4096), Buffer.alloc(4096));
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assert.deepStrictEqual(
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Buffer.concat([random10], 40),
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Buffer.concat([random10, Buffer.alloc(30)]));
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assert.deepStrictEqual(Buffer.concat([new Uint8Array([0x41, 0x42]),
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new Uint8Array([0x43, 0x44])]),
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Buffer.from('ABCD'));
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