New deprecation warning with --compilers

[zelliott]

According to the latest version of mocha, runnig the --compilers flag results in the error:

(node:14392) DeprecationWarning: "--compilers" will be removed in a future version of Mocha; see https://git.io/vdcSr for more info

In attempting to change my test runner command from:

--compilers ts:ts-node/register
--require tsconfig-paths/register ...

to

--require ts-node/register tsconfig-paths/register

the following warnings/errors are thrown:

Warning: Could not find any test files matching pattern: tsconfig-paths/register
Error: Cannot find module [my-imported-library]

There probably needs to be a fix for this when the compilers tag is turned off for good.

[joseSantacruz]

Same issue here, I also tried to change to:

--require ts-node/register
--require tsconfig-paths/register

But I get the error:
No test files found
I also tried to change to:

--require tsconfig-paths/register
--require ts-node/register

But then I get the error:

/usr/src/app/node_modules/ts-node/src/index.ts:425
  const result = loadSync(cwd, typeof project === 'string' ? project : undefined)
                 ^
TypeError: tsconfig_1.loadSync is not a function
    at readConfig (/usr/src/app/node_modules/ts-node/src/index.ts:425:18)
    at Object.register (/usr/src/app/node_modules/ts-node/src/index.ts:189:18)
    at Object.<anonymous> (/usr/src/app/node_modules/ts-node/register.js:1:15)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.require (module.js:497:17)
    at require (internal/module.js:20:19)
    at /usr/src/app/node_modules/mocha/bin/_mocha:370:3
    at Array.forEach (native)
    at Object.<anonymous> (/usr/src/app/node_modules/mocha/bin/_mocha:369:10)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)
    at Module.runMain (module.js:604:10)
    at run (bootstrap_node.js:390:7)
    at startup (bootstrap_node.js:150:9)
    at bootstrap_node.js:505:3

[Jontem]

According to Mocha compiler deprecation

Mocha, by default, loads only .js when given a directory (and the default directory is test). Therefore, to use a different file extension (such as .coffee or .ts), you will need to supply a glob instead of simply a directory.

This works for me:
mocha -r ts-node/register -r tsconfig-paths/register "test/**/*.ts"

[joseSantacruz]

thank you, @Jontem adding the extension part works

[zelliott]

Yep, thanks @Jontem. Closing this bug.