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'use strict';
var Buffer = require('../../').Buffer;
var assert = require('assert');
var zero = [];
var one = [ Buffer.from('asdf') ];
var long = [];
for (var i = 0; i < 10; i++) long.push(Buffer.from('asdf'));
var flatZero = Buffer.concat(zero);
var flatOne = Buffer.concat(one);
var flatLong = Buffer.concat(long);
var flatLongLen = Buffer.concat(long, 40);
assert(flatZero.length === 0);
assert(flatOne.toString() === 'asdf');
// 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(flatOne !== one[0]);
assert(flatLong.toString() === (new Array(10 + 1).join('asdf')));
assert(flatLongLen.toString() === (new Array(10 + 1).join('asdf')));
assertWrongList();
assertWrongList(null);
assertWrongList(Buffer.from('hello'));
assertWrongList([42]);
assertWrongList(['hello', 'world']);
assertWrongList(['hello', Buffer.from('world')]);
function assertWrongList(value) {
assert.throws(function() {
Buffer.concat(value);
}, function(err) {
return err instanceof TypeError &&
err.message === '"list" argument must be an Array of Buffers';
});
}