Ava: Power assert not working with TypeScript recipe

[Christilut]

Description

Since I changed from ava-ts back to ava with better TypeScript support, power assert seems to have stopped working. See output below.

Same with objects or anything else.

I would expect that it prints the incorrect value (so A.B.Tester in this case) and if it's an object then the entire object or the diff.

Test Source

test('conversion - test createFullname method', async t => {
  t.true(createFullname('A.B.', '', 'Tester') === 'A.B. Tester')

  t.pass()
})

Error Message & Stack Trace

   11:   t.true(createFullname('A.B.', '', 'Tester') === 'A.B. Tester')

  Value is not `true`:

  false

Config

ava.config.js:

export default {
  "compileEnhancements": false, // Tried true as well
  "extensions": [
    "ts"
  ],
  "require": [
    "ts-node/register"
  ],
  "files": [
    "tests/*.test.ts"
  ]
}

Command-Line Arguments

Copy your npm build scripts or the ava command used:

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 v8.12.0
linux 4.15.0-34-generic
ava 1.0.0-beta.8
npm 6.4.1

[novemberborn]

Power Assert relies on compileEnhancements, which you can't use because you're using TypeScript.

(I'm closing this issue for housekeeping purposes, but let's keep the conversation going.)

[Christilut]

Okay, can this be a feature request? I love power assert :)

[novemberborn]

I'm not quite sure how we'd combine the two. Perhaps something to revisit once we have more integrated TypeScript support.

[Saul-Mirone]

Hi guys, I found a way to use power-assert and typescript with ava!

npm install -D espower-typescript ts-node ava

{
  // package.json
  "ava": {
    "files": [
      "test/**/*.test.ts"
    ],
    "compileEnhancements": false,
    "extensions": [
      "ts"
    ],
    "require": [
      "ts-node/register",
      "espower-typescript/guess"
    ]
  }
}

Then just run:
$ TS_NODE_TRANSPILE_ONLY=1 npx ava

[Christilut]

Doesn't work for me sadly :(

It just says that Value is not 'true' now for a t.true() assertion and the line number it shows is way off. Doesn't show any power assertion.