mirror of https://gitee.com/openkylin/nodejs.git
51 lines
1.1 KiB
JavaScript
51 lines
1.1 KiB
JavaScript
// Flags: --expose-internals
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'use strict';
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require('../common');
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const assert = require('assert');
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const BufferList = require('internal/streams/buffer_list');
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// Test empty buffer list.
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const emptyList = new BufferList();
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emptyList.shift();
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assert.deepStrictEqual(emptyList, new BufferList());
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assert.strictEqual(emptyList.join(','), '');
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assert.deepStrictEqual(emptyList.concat(0), Buffer.alloc(0));
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const buf = Buffer.from('foo');
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function testIterator(list, count) {
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// test iterator
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let len = 0;
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// eslint-disable-next-line no-unused-vars
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for (const x of list) {
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len++;
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}
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assert.strictEqual(len, count);
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}
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// Test buffer list with one element.
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const list = new BufferList();
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testIterator(list, 0);
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list.push(buf);
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testIterator(list, 1);
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for (const x of list) {
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assert.strictEqual(x, buf);
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}
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const copy = list.concat(3);
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testIterator(copy, 3);
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assert.notStrictEqual(copy, buf);
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assert.deepStrictEqual(copy, buf);
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assert.strictEqual(list.join(','), 'foo');
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const shifted = list.shift();
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testIterator(list, 0);
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assert.strictEqual(shifted, buf);
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assert.deepStrictEqual(list, new BufferList());
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