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// Flags: --expose_internals
'use strict';
require('../common');
const assert = require('assert');
const BufferList = require('internal/streams/buffer_list');
const util = require('util');
// Test empty buffer list.
const emptyList = new BufferList();
emptyList.shift();
assert.deepStrictEqual(emptyList, new BufferList());
assert.strictEqual(emptyList.join(','), '');
assert.deepStrictEqual(emptyList.concat(0), Buffer.alloc(0));
const buf = Buffer.from('foo');
// Test buffer list with one element.
const list = new BufferList();
list.push(buf);
const copy = list.concat(3);
assert.notStrictEqual(copy, buf);
assert.deepStrictEqual(copy, buf);
assert.strictEqual(list.join(','), 'foo');
const shifted = list.shift();
assert.strictEqual(shifted, buf);
assert.deepStrictEqual(list, new BufferList());
const tmp = util.inspect.defaultOptions.colors;
util.inspect.defaultOptions = { colors: true };
assert.strictEqual(
util.inspect(list),
'BufferList { length: \u001b[33m0\u001b[39m }');
util.inspect.defaultOptions = { colors: tmp };
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