var fs = require('graceful-fs')
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var test = require('tap').test
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var path = require('path')
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var writeStream = require('../index.js')
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var rename = fs.rename
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fs.rename = function (from, to, cb) {
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setTimeout(function () {
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rename(from, to, cb)
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}, 100)
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}
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test('basic', function (t) {
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// open 10 write streams to the same file.
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// then write to each of them, and to the target
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// and verify at the end that each of them does their thing
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var target = path.resolve(__dirname, 'test.txt')
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var n = 10
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// We run all of our assertions twice:
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// once for finish, once for close
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// There are 6 assertions, two fixed, plus 4 lines in the file.
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t.plan(n * 2 * 6)
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var streams = []
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for (var i = 0; i < n; i++) {
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var s = writeStream(target)
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s.on('finish', verifier('finish', i))
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s.on('close', verifier('close', i))
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streams.push(s)
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}
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function verifier (ev, num) {
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return function () {
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if (ev === 'close') {
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t.equal(this.__emittedFinish, true, num + '. closed only after finish')
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} else {
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this.__emittedFinish = true
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t.equal(ev, 'finish', num + '. finished')
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}
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// make sure that one of the atomic streams won.
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var res = fs.readFileSync(target, 'utf8')
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var lines = res.trim().split(/\n/)
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lines.forEach(function (line, lineno) {
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var first = lines[0].match(/\d+$/)[0]
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var cur = line.match(/\d+$/)[0]
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t.equal(cur, first, num + '. line ' + lineno + ' matches')
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})
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var resExpr = /^first write \d+\nsecond write \d+\nthird write \d+\nfinal write \d+\n$/
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t.similar(res, resExpr, num + '. content matches')
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}
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}
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// now write something to each stream.
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streams.forEach(function (stream, i) {
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stream.write('first write ' + i + '\n')
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})
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// wait a sec for those writes to go out.
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setTimeout(function () {
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// write something else to the target.
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fs.writeFileSync(target, 'brutality!\n')
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// write some more stuff.
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streams.forEach(function (stream, i) {
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stream.write('second write ' + i + '\n')
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})
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setTimeout(function () {
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// Oops! Deleted the file!
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fs.unlinkSync(target)
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// write some more stuff.
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streams.forEach(function (stream, i) {
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stream.write('third write ' + i + '\n')
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})
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setTimeout(function () {
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fs.writeFileSync(target, 'brutality TWO!\n')
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streams.forEach(function (stream, i) {
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stream.end('final write ' + i + '\n')
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})
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}, 50)
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}, 50)
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}, 50)
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})
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test('cleanup', function (t) {
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fs.readdirSync(__dirname).filter(function (f) {
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return f.match(/^test.txt/)
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}).forEach(function (file) {
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fs.unlinkSync(path.resolve(__dirname, file))
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})
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t.end()
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})
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