Testing with mocha and defining project with TS_NODE_PROJECT fails

Hi

I have a project, a library, of small convenience methods for JS and I use Mocha for my unit testing with the following command:

cross-env TS_NODE_PROJECT=./test nyc mocha --compilers ts:ts-node/register ./test/*.spec.ts

Which has worked well until I updated to ts-node version 5.0.1.

Now it it has started failing with the error message that it cannot find my test folder.

So I wanted to know if you could tell me why it is failing?

Note
I use NYC (Istanbul) for code coverage, but the compilation fails even if I remove that from the command.

My Library set up

MyLibrary
|- test
|  |- <*.spec.ts>
|  |- tsconfig.json
|- <*.ts>
|- tsconfig.json

All my main files are in the root of the project and all the test files are in a test folder.

As I am compiling the tests a bit differently than the main files I have added a tsconfig.json in the root of the test folder and I am (trying to) instructing the TS compiler to use the test folder tsconfig.json for the compilation.

test/tsconfig.json

{
  "compilerOptions": {
    "module": "commonjs",
    "noImplicitAny": true,
    "removeComments": true,
    "preserveConstEnums": true,
    "sourceMap": true,
    "target": "es2017",
    "lib": ["es5", "es6", "dom"],
    "moduleResolution": "node",
    "allowJs": false,
    "outDir": "."
  },

  "include": [
    "../*.ts"
  ],

  "exclude": [
    "node_modules",
    "../test/**/*.ts"
  ]
}

Error Message thrown

C:\projects\MyLibrary\node_modules\ts-node\src\index.ts:453
        throw new TSError([formatDiagnostic(result.error, cwd, ts, 0)])
              ^
TSError: Γ¿» Unable to compile TypeScript
The specified path does not exist: 'C:\projects\MyLibrary\test'. (5058)
    at readConfig (C:\projects\MyLibrary\node_modules\ts-node\src\index.ts:453:15)
    at Object.register (C:\projects\MyLibrary\node_modules\ts-node\src\index.ts:209:18)
    at Object.<anonymous> (C:\projects\MyLibrary\node_modules\ts-node\register\index.js:1:16)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Module.require (module.js:579:17)
    at require (internal/module.js:11:18)
    at program.compilers.forEach.c (C:\projects\MyLibrary\node_modules\mocha\bin\_mocha:459:3)
    at Array.forEach (<anonymous>)
    at Object.<anonymous> (C:\projects\MyLibrary\node_modules\mocha\bin\_mocha:451:19)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Function.Module.runMain (module.js:676:10)
    at startup (bootstrap_node.js:187:16)
    at bootstrap_node.js:608:3

[duvet86]

You are definitely right, removing the space fixes it. SET TS_NODE_PROJECT=./test/tsconfig.json&& mocha -r ts-node/register -r tsconfig-paths/register test/**/*.ts

Last question why setting the inline option doesn’t work? mocha -r ts-node/register --project /test/tsconfig.json -r tsconfig-paths/register test/**/*.ts

[blakeembrey]

Because --project is not a mocha argument.