how to using mocha for testing

[morriswinkler]

I added my mocha tests with the nx:run-commands executor.

Is there any other way of doing it?

[tomerguttman]

up

[yonatan-jux]

@morriswinkler
could you please share how you did it with the nx:run-commands?

[morriswinkler]

{
    "$schema": "../../node_modules/nx/schemas/project-schema.json",
    "sourceRoot": "libs/my-package/",
    "projectType": "library",
    "targets": {
        "test": {
            "executor": "nx:run-commands",
            "dependsOn": [{"projects": "self", "target": "build"}],
            "options": {
                "commands": [
                    "mocha"
                ]
            }
       }
   }
}

[lakshmikanthadn]

The above solution works great for the JS application without any local package dependency.

But How do we configure this for a Typescript application that has local package dependencies?

My first solution was,
Build the application along with its dependent packages then run the test,
but I get an error that says local package not found,

Any help is really appreciated. we are migrating to NX.

[eXigentCoder]

I got mocha working in my nx repo with local package dependencies using a script in the package.json file, though I'm sure it could be easily updated to run in the executor. The command that worked for me was:

"mocha": "cross-env NODE_ENV=test mocha src/**/*.test.ts --require ts-node/register -r tsconfig-paths/register --recursive --extension .ts --exit",

Hope that helps!

[wernc23]

Hey all, I was able to get it working with the following

 "test": {
      "executor": "nx:run-commands",
      "outputs": ["{workspaceRoot}/coverage/{projectRoot}"],
      "dependsOn": [{ "projects": "self", "target": "build" }],
      "options": {
        "commands": [
          "nyc --reporter=lcov --reporter=text --reporter=html mocha --config .mocharc.js --require ts-node/register --require source-map-support/register --recursive --exclude \"node_modules/**/*\" \"**/*spec.ts\""
        ],
        "cwd": "libs/my-library"
      }
    }
    

The cwd was important here. So from the root I can run npx nx test my-library and it now runs using mocha. My mocharc is straight forward

   module.exports = {
  exclude: ['node_modules/**/*'],
  extension: ['ts'],
  forbidOnly: true,
  forbidPending: true,
  require: ['ts-node/register', 'source-map-support/register'],
  spec: ['**/*.spec.ts'],
};

Hope this helps someone.