Error: Cannot find module 'undefined/path/to/functions'

[olaven]

Hi 👋
I am very new to Serverless, so I may be skipping something relatively obvious.

I have set up a test-template/test as per this guide. The test function generated by the template looks like it is passing the correct values to mochaPlugin, however the tests do not run and the following is printed out in the console:

# NOTE: PATH_TO_MY_PROJECT added by me
Error: Cannot find module 'undefined/src/functions/testFunction.js'
Require stack:
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/serverless-mocha-plugin/index.js
- /Users/olaven/PATH_TO_MY_PROJECT/src/tests/testFunction.js
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/mocha/lib/esm-utils.js
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/mocha/lib/mocha.js
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/mocha/lib/cli/one-and-dones.js
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/mocha/lib/cli/options.js
- /Users/olaven/PATH_TO_MY_PROJECT/node_modules/mocha/bin/mocha
    at Function.Module._resolveFilename (internal/modules/cjs/loader.js:966:15)

Is this a known issue?

Have a great day 😄

• olaven

[olaven]

it seems like process.env.SERVERLESS_TEST_ROOT is not defined when reaching this line. Manually changing this line to the full module path made the test pass. Just removing the SERVERLESS_TEST_ROOT-prefix did not. 🤔

I.e. myModule.runScripts('preTestCommands') never gets called, and the code setting the environment variable is never run. Is it supposed to? 😄

[salvadornava01]

it seems like process.env.SERVERLESS_TEST_ROOT is not defined when reaching this line. Manually changing this line to the full module path made the test pass. Just removing the SERVERLESS_TEST_ROOT-prefix did not. 🤔

I.e. myModule.runScripts('preTestCommands') never gets called, and the code setting the environment variable is never run. Is it supposed to? 😄

Thanks for your comment, I've ran on the same issue and changed the line const mod = require(process.env.SERVERLESS_TEST_ROOT + modPath); to const mod = require(process.env.PWD + modPath); in "index.js" located in /nodemodules/serverless-mocha/index.js and it worked for me!

I've tested on Windows and soon I'll test it on Mac to see if it works, and if it works properly maybe commit the change and wait for a PR to be merged 😊

[camunity]

In my case I had to switch this line in my test file

let wrapped = mochaPlugin.getWrapper('hello', '/hello.js', 'hello');

to this:

let wrapped = mochaPlugin.getWrapper('hello', '/index.js', 'hello');

Where my function is named hello and it's handler is a file called index.js. I had called sls create test --function hello at first and it configured the test directory and test file fine but I kept receiving the OP's error until I changed that second directory path.