Ava rerunning all tests when changing single test file, when using .ts files.

[pollard93]

Description

Ava rerunning all tests when changing single test file, when using .ts files.

Error Message & Stack Trace

ava:watcher Detected change of path/to/testFile.ts +0ms
ava:watcher Sources remain that cannot be traced to specific tests: [ 'path/to/testFile.ts' ] +103ms
ava:watcher Rerunning all tests +1ms

Config

Copy the relevant section from package.json:

{
  "ava": {
    "compileEnhancements": false,
    "extensions": [
      "ts"
    ],
    "require": [
      "ts-node/register"
    ],
    "files": [
      "path/to/testFile.ts",
    ],
    "verbose": true
  }
}

Command-Line Arguments

DEBUG=ava:watcher npm test -- --watch --verbose

The cause (I believe)

node_modules/ava/lib/watcher.js:370 filters dirtyTests using the isTest function (node_modules/ava/lib/ava-files.js:208) which requires files to have a .js extension to resolve.

Environment

Tell us which operating system you are using, as well as which versions of Node.js, npm, and AVA. Run the following to get it quickly:

Node.js v11.4.0
darwin 18.2.0
ava: 1.4.0
npm: 6.4.1

[novemberborn]

Oh good catch! It needs to check against this.extensions:

ava/lib/ava-files.js

Line 208 in 9ef456b

if (path.extname(filePath) !== '.js' || path.basename(filePath)[0] === '_') {