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// Flags: --expose_internals
'use strict';
require('../common');
const assert = require('assert');
const BufferList = require('internal/streams/BufferList');
// 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));
// Test buffer list with one element.
const list = new BufferList();
list.push('foo');
assert.strictEqual(list.concat(1), 'foo');
assert.strictEqual(list.join(','), 'foo');
const shifted = list.shift();
assert.strictEqual(shifted, 'foo');
assert.deepStrictEqual(list, new BufferList());
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