Timeout error thrown when running without concurrency

[avaly]

Description

Running ava with any concurrency value >1 passes all tests.

Running ava with concurrency value 0 or with serial flag enabled, a timeout error is thrown and not all tests are being run.

Increasing the timeout value in the config to 30 seconds, does not have any effect on the outcome.

Error Message & Stack Trace

$ ava --concurrency=2 

  136 passed

$ ava --concurrency=0 

  112 passed
  1 exception

  ✖ Exited because no new tests completed within the last 10000ms of inactivity

Config

Copy the relevant section from package.json:

{
  "ava": {
    "babel": "inherit",
    "failFast": true,
    "files": [
      "api/**/*-test.js",
      "client/**/*-test.js",
      "shared/**/*-test.js",
      "tasks/**/*-test.js"
    ],
    "require": [
      "babel-register",
      "./tests/ava-setup.js"
    ],
    "timeout": "10s",
    "verbose": false
  }
}

Command-Line Arguments

Copy your npm build scripts or the ava command used:

$ ava --concurrency=2
$ ava --concurrency=0

Environment

Node.js v8.1.2
linux 4.4.0-83-generic (Ubuntu 16.04)
ava 0.21.0
npm 5.0.3

[novemberborn]

--concurrency=0 seems like it should result in an error. I reckon it currently works without any concurrency limitation, and the timeout may just be because of your system slowing down. Which is why we have the option to begin with.

In other words, I'm not sure there's an issue here?

[avaly]

Maybe I misunderstood the meaning of --concurrency=0. I had assumed it was doing the same as --serial. Using --concurrency=1 works for me. Feel free to close if you believe it's not a bug @novemberborn .

[novemberborn]

@avaly no worries. I've opened #1476 so AVA can give a helpful message earlier.