summaryrefslogtreecommitdiff
path: root/deps/npm/node_modules/worker-farm/tests/index.js
blob: bc39c1081b40079dfef22c73e9861d6df68248ae (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
'use strict'

const tape          = require('tape')
    , child_process = require('child_process')
    , workerFarm    = require('../')
    , childPath     = require.resolve('./child')
    , fs            = require('fs')

function uniq (ar) {
  let a = [], i, j
  o: for (i = 0; i < ar.length; ++i) {
    for (j = 0; j < a.length; ++j) if (a[j] == ar[i]) continue o
    a[a.length] = ar[i]
  }
  return a
}


// a child where module.exports = function ...
tape('simple, exports=function test', function (t) {
  t.plan(4)

  let child = workerFarm(childPath)
  child(0, function (err, pid, rnd) {
    t.ok(pid > process.pid, 'pid makes sense')
    t.ok(pid < process.pid + 500, 'pid makes sense')
    t.ok(rnd >= 0 && rnd < 1, 'rnd result makes sense')
  })

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


// a child where we have module.exports.fn = function ...
tape('simple, exports.fn test', function (t) {
  t.plan(4)

  let child = workerFarm(childPath, [ 'run0' ])
  child.run0(function (err, pid, rnd) {
    t.ok(pid > process.pid, 'pid makes sense')
    t.ok(pid < process.pid + 500, 'pid makes sense')
    t.ok(rnd >= 0 && rnd < 1, 'rnd result makes sense')
  })

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


// use the returned pids to check that we're using a single child process
// when maxConcurrentWorkers = 1
tape('single worker', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 1 }, childPath)
    , pids  = []
    , i     = 10

  while (i--) {
    child(0, function (err, pid) {
      pids.push(pid)
      if (pids.length == 10) {
        t.equal(1, uniq(pids).length, 'only a single process (by pid)')
      } else if (pids.length > 10)
        t.fail('too many callbacks!')
    })
  }

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


// use the returned pids to check that we're using two child processes
// when maxConcurrentWorkers = 2
tape('two workers', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 2 }, childPath)
    , pids  = []
    , i     = 10

  while (i--) {
    child(0, function (err, pid) {
      pids.push(pid)
      if (pids.length == 10) {
        t.equal(2, uniq(pids).length, 'only two child processes (by pid)')
      } else if (pids.length > 10)
        t.fail('too many callbacks!')
    })
  }

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


// use the returned pids to check that we're using a child process per
// call when maxConcurrentWorkers = 10
tape('many workers', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 10 }, childPath)
    , pids  = []
    , i     = 10

  while (i--) {
    child(1, function (err, pid) {
      pids.push(pid)
      if (pids.length == 10) {
        t.equal(10, uniq(pids).length, 'pids are all the same (by pid)')
      } else if (pids.length > 10)
        t.fail('too many callbacks!')
    })
  }

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


tape('auto start workers', function (t) {
  t.plan(4)

  let child = workerFarm({ maxConcurrentWorkers: 3, autoStart: true }, childPath, ['uptime'])
    , pids  = []
    , i     = 3
    , delay = 150

  setTimeout(function() {
    while (i--)
      child.uptime(function (err, uptime) {
        t.ok(uptime > 10, 'child has been up before the request')
      })

    workerFarm.end(child, function () {
      t.ok(true, 'workerFarm ended')
    })
  }, delay)
})


// use the returned pids to check that we're using a child process per
// call when we set maxCallsPerWorker = 1 even when we have maxConcurrentWorkers = 1
tape('single call per worker', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 1, maxCallsPerWorker: 1 }, childPath)
    , pids  = []
    , i     = 10

  while (i--) {
    child(0, function (err, pid) {
      pids.push(pid)
      if (pids.length == 10) {
        t.equal(10, uniq(pids).length, 'one process for each call (by pid)')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (pids.length > 10)
        t.fail('too many callbacks!')
    })
  }
})


// use the returned pids to check that we're using a child process per
// two-calls when we set maxCallsPerWorker = 2 even when we have maxConcurrentWorkers = 1
tape('two calls per worker', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 1, maxCallsPerWorker: 2 }, childPath)
    , pids  = []
    , i     = 10

  while (i--) {
    child(0, function (err, pid) {
      pids.push(pid)
      if (pids.length == 10) {
        t.equal(5, uniq(pids).length, 'one process for each call (by pid)')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (pids.length > 10)
        t.fail('too many callbacks!')
    })
  }
})


// use timing to confirm that one worker will process calls sequentially
tape('many concurrent calls', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 1 }, childPath)
    , i     = 10
    , cbc   = 0
    , start = Date.now()

  while (i--) {
    child(100, function () {
      if (++cbc == 10) {
        let time = Date.now() - start
        t.ok(time > 100 && time < 250, 'processed tasks concurrently (' + time + 'ms)')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (cbc > 10)
        t.fail('too many callbacks!')
    })
  }
})


// use timing to confirm that one child processes calls sequentially with
// maxConcurrentCallsPerWorker = 1
tape('single concurrent call', function (t) {
  t.plan(2)

  let child = workerFarm(
          { maxConcurrentWorkers: 1, maxConcurrentCallsPerWorker: 1 }
        , childPath
      )
    , i     = 10
    , cbc   = 0
    , start = Date.now()

  while (i--) {
    child(20, function () {
      if (++cbc == 10) {
        let time = Date.now() - start
        t.ok(time > 200 && time < 400, 'processed tasks sequentially (' + time + 'ms)')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (cbc > 10)
        t.fail('too many callbacks!')
    })
  }
})


// use timing to confirm that one child processes *only* 5 calls concurrently
tape('multiple concurrent calls', function (t) {
  t.plan(2)

  let child = workerFarm({ maxConcurrentWorkers: 1, maxConcurrentCallsPerWorker: 5 }, childPath)
    , i     = 10
    , cbc   = 0
    , start = Date.now()

  while (i--) {
    child(100, function () {
      if (++cbc == 10) {
        let time = Date.now() - start
        t.ok(time > 200 && time < 350, 'processed tasks concurrently (' + time + 'ms)')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (cbc > 10)
        t.fail('too many callbacks!')
    })
  }
})


// call a method that will die with a probability of 0.5 but expect that
// we'll get results for each of our calls anyway
tape('durability', function (t) {
  t.plan(3)

  let child = workerFarm({ maxConcurrentWorkers: 2 }, childPath, [ 'killable' ])
    , ids   = []
    , pids  = []
    , i     = 10

  while (i--) {
    child.killable(i, function (err, id, pid) {
      ids.push(id)
      pids.push(pid)
      if (ids.length == 10) {
        t.ok(uniq(pids).length > 2, 'processed by many (' + uniq(pids).length + ') workers, but got there in the end!')
        t.ok(uniq(ids).length == 10, 'received a single result for each unique call')
        workerFarm.end(child, function () {
          t.ok(true, 'workerFarm ended')
        })
      } else if (ids.length > 10)
        t.fail('too many callbacks!')
    })
  }
})


// a callback provided to .end() can and will be called (uses "simple, exports=function test" to create a child)
tape('simple, end callback', function (t) {
  t.plan(4)

  let child = workerFarm(childPath)
  child(0, function (err, pid, rnd) {
    t.ok(pid > process.pid, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(pid < process.pid + 500, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(rnd >= 0 && rnd < 1, 'rnd result makes sense')
  })

  workerFarm.end(child, function() {
    t.pass('an .end() callback was successfully called')
  })
})


tape('call timeout test', function (t) {
  t.plan(3 + 3 + 4 + 4 + 4 + 3 + 1)

  let child = workerFarm({ maxCallTime: 250, maxConcurrentWorkers: 1 }, childPath)

  // should come back ok
  child(50, function (err, pid, rnd) {
    t.ok(pid > process.pid, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(pid < process.pid + 500, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(rnd > 0 && rnd < 1, 'rnd result makes sense ' + rnd)
  })

  // should come back ok
  child(50, function (err, pid, rnd) {
    t.ok(pid > process.pid, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(pid < process.pid + 500, 'pid makes sense ' + pid + ' vs ' + process.pid)
    t.ok(rnd > 0 && rnd < 1, 'rnd result makes sense ' + rnd)
  })

  // should die
  child(500, function (err, pid, rnd) {
    t.ok(err, 'got an error')
    t.equal(err.type, 'TimeoutError', 'correct error type')
    t.ok(pid === undefined, 'no pid')
    t.ok(rnd === undefined, 'no rnd')
  })

  // should die
  child(1000, function (err, pid, rnd) {
    t.ok(err, 'got an error')
    t.equal(err.type, 'TimeoutError', 'correct error type')
    t.ok(pid === undefined, 'no pid')
    t.ok(rnd === undefined, 'no rnd')
  })

  // should die even though it is only a 100ms task, it'll get caught up
  // in a dying worker
  setTimeout(function () {
    child(100, function (err, pid, rnd) {
      t.ok(err, 'got an error')
      t.equal(err.type, 'TimeoutError', 'correct error type')
      t.ok(pid === undefined, 'no pid')
      t.ok(rnd === undefined, 'no rnd')
    })
  }, 200)

  // should be ok, new worker
  setTimeout(function () {
    child(50, function (err, pid, rnd) {
      t.ok(pid > process.pid, 'pid makes sense ' + pid + ' vs ' + process.pid)
      t.ok(pid < process.pid + 500, 'pid makes sense ' + pid + ' vs ' + process.pid)
      t.ok(rnd > 0 && rnd < 1, 'rnd result makes sense ' + rnd)
    })
    workerFarm.end(child, function () {
      t.ok(true, 'workerFarm ended')
    })
  }, 400)
})


tape('test error passing', function (t) {
  t.plan(10)

  let child = workerFarm(childPath, [ 'err' ])
  child.err('Error', 'this is an Error', function (err) {
    t.ok(err instanceof Error, 'is an Error object')
    t.equal('Error', err.type, 'correct type')
    t.equal('this is an Error', err.message, 'correct message')
  })
  child.err('TypeError', 'this is a TypeError', function (err) {
    t.ok(err instanceof Error, 'is a TypeError object')
    t.equal('TypeError', err.type, 'correct type')
    t.equal('this is a TypeError', err.message, 'correct message')
  })
  child.err('Error', 'this is an Error with custom props', {foo: 'bar', 'baz': 1}, function (err) {
    t.ok(err instanceof Error, 'is an Error object')
    t.equal(err.foo, 'bar', 'passes data')
    t.equal(err.baz, 1, 'passes data')
  })

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


tape('test maxConcurrentCalls', function (t) {
  t.plan(10)

  let child = workerFarm({ maxConcurrentCalls: 5 }, childPath)

  child(50, function (err) { t.notOk(err, 'no error') })
  child(50, function (err) { t.notOk(err, 'no error') })
  child(50, function (err) { t.notOk(err, 'no error') })
  child(50, function (err) { t.notOk(err, 'no error') })
  child(50, function (err) { t.notOk(err, 'no error') })
  child(50, function (err) {
    t.ok(err)
    t.equal(err.type, 'MaxConcurrentCallsError', 'correct error type')
  })
  child(50, function (err) {
    t.ok(err)
    t.equal(err.type, 'MaxConcurrentCallsError', 'correct error type')
  })

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


// this test should not keep the process running! if the test process
// doesn't die then the problem is here
tape('test timeout kill', function (t) {
  t.plan(3)

  let child = workerFarm({ maxCallTime: 250, maxConcurrentWorkers: 1 }, childPath, [ 'block' ])
  child.block(function (err) {
    t.ok(err, 'got an error')
    t.equal(err.type, 'TimeoutError', 'correct error type')
  })

  workerFarm.end(child, function () {
    t.ok(true, 'workerFarm ended')
  })
})


tape('test max retries after process terminate', function (t) {
  t.plan(7)

  // temporary file is used to store the number of retries among terminating workers
  let filepath1 = '.retries1'
  let child1 = workerFarm({ maxConcurrentWorkers: 1, maxRetries: 5}, childPath, [ 'stubborn' ])
  child1.stubborn(filepath1, function (err, result) {
    t.notOk(err, 'no error')
    t.equal(result, 12, 'correct result')
  })

  workerFarm.end(child1, function () {
    fs.unlinkSync(filepath1)
    t.ok(true, 'workerFarm ended')
  })

  let filepath2 = '.retries2'
  let child2 = workerFarm({ maxConcurrentWorkers: 1, maxRetries: 3}, childPath, [ 'stubborn' ])
  child2.stubborn(filepath2, function (err, result) {
    t.ok(err, 'got an error')
    t.equal(err.type, 'ProcessTerminatedError', 'correct error type')
    t.equal(err.message, 'cancel after 3 retries!', 'correct message and number of retries')
  })

  workerFarm.end(child2, function () {
    fs.unlinkSync(filepath2)
    t.ok(true, 'workerFarm ended')
  })
})


tape('ensure --debug/--inspect not propagated to children', function (t) {
  t.plan(3)

  let script   = __dirname + '/debug.js'
    , debugArg = process.version.replace(/^v(\d+)\..*$/, '$1') >= 8 ? '--inspect' : '--debug=8881'
    , child    = child_process.spawn(process.execPath, [ debugArg, script ])
    , stdout   = ''

  child.stdout.on('data', function (data) {
    stdout += data.toString()
  })

  child.on('close', function (code) {
    t.equal(code, 0, 'exited without error (' + code + ')')
    t.ok(stdout.indexOf('FINISHED') > -1, 'process finished')
    t.ok(stdout.indexOf('--debug') === -1, 'child does not receive debug flag')
  })
})