Prompts can not be meaningfully rendered in non-TTY environments

[brianjquinn]

yeoman-test@2.2.0
yeoman-generator@4.6.0

Out of no where yesterday, my yeoman generator's unit tests using this yeoman-test run() function is suddenly failing with:

(node:6088) UnhandledPromiseRejectionWarning: Error: Prompts can not be meaningfully rendered in non-TTY environments
    at TestAdapter.promptModule (<redacted>/node_modules/inquirer/lib/inquirer.js:30:27)
    at TestAdapter.prompt (<redacted>/node_modules/yeoman-test/lib/adapter.js:78:22)
...

My test looks something like this:

const helpers = require('yeoman-test');
const generator = path.join(__dirname, '../generators/app');
const RunContext = helpers.run(generator).withPrompts({ ... }).withOptions({skipInstall: false}).inDir(path.join(__dirname, 'temp');

The above stack trace happens both in my build (Jenkins) and when run locally on the command line.

[mshima]

Inquirer.js has released version 7.0.5.
That seems to be the root cause.
You should consider a package lock file for now.

[mshima]

This problem was caused by SBoudrias/Inquirer.js#891
This PR should fix the problem SBoudrias/Inquirer.js#896

I analyzed the bug and it’s not fixable on yeoman-test.
It requires a new inquirer release.
Closing since we have to wait for an upstream fix.

[SBoudrias]

A new release has been pushed to npm. Let me know if that's still a problem!

[tuckbick]

This doesn't seemed to have helped my case where I've provided prompt answers via withPrompts({...}). The isTTY check put into place in fetchAnswer() will run regardless of whether or not prompt answers have been provided.

[brianjquinn]

@SBoudrias - My use case is identical to @tuckbick's and I also still experience the error quoted in this issue post updating to the latest npm release of inquirer (which I believe is 7.0.6)

[mshima]

There is a PR to fix this issue SBoudrias/Inquirer.js#903