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| Current File : //proc/thread-self/root/home/ubuntu/node-v16.18.1/test/parallel/test-readline-async-iterators.js |
'use strict';
const common = require('../common');
const fs = require('fs');
const { join } = require('path');
const readline = require('readline');
const assert = require('assert');
const tmpdir = require('../common/tmpdir');
tmpdir.refresh();
const filename = join(tmpdir.path, 'test.txt');
const testContents = [
'',
'\n',
'line 1',
'line 1\nline 2 南越国是前203年至前111年存在于岭南地区的一个国家\nline 3\ntrailing',
'line 1\nline 2\nline 3 ends with newline\n',
];
async function testSimple() {
for (const fileContent of testContents) {
fs.writeFileSync(filename, fileContent);
const readable = fs.createReadStream(filename);
const rli = readline.createInterface({
input: readable,
crlfDelay: Infinity
});
const iteratedLines = [];
for await (const k of rli) {
iteratedLines.push(k);
}
const expectedLines = fileContent.split('\n');
if (expectedLines[expectedLines.length - 1] === '') {
expectedLines.pop();
}
assert.deepStrictEqual(iteratedLines, expectedLines);
assert.strictEqual(iteratedLines.join(''), fileContent.replace(/\n/g, ''));
}
}
async function testMutual() {
for (const fileContent of testContents) {
fs.writeFileSync(filename, fileContent);
const readable = fs.createReadStream(filename);
const rli = readline.createInterface({
input: readable,
crlfDelay: Infinity
});
const expectedLines = fileContent.split('\n');
if (expectedLines[expectedLines.length - 1] === '') {
expectedLines.pop();
}
const iteratedLines = [];
let iterated = false;
for await (const k of rli) {
// This outer loop should only iterate once.
assert.strictEqual(iterated, false);
iterated = true;
iteratedLines.push(k);
for await (const l of rli) {
iteratedLines.push(l);
}
assert.deepStrictEqual(iteratedLines, expectedLines);
}
assert.deepStrictEqual(iteratedLines, expectedLines);
}
}
testSimple().then(testMutual).then(common.mustCall());
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