Using Mocha with TypeScript paths

Question

I'm having an issue with running mocha when using the paths + baseUrl configuration in TypeScript

My tsconfig.js is set like so:

"baseUrl": "./src/", /* Base directory to resolve non-absolute module names. */
"paths": {
  "interfaces/*": [
    "interfaces/*"
  ],
  "models/*": [
    "models/*"
  ],
  "schemas/*": [
    "schemas/*"
  ],
  "classes/*": [
    "classes/*"
  ],
  "libs/*": [
    "libs/*"
  ],
  "config/*": [
    "config/*"
  ]

and I'm runnings mocha as "mocha build/test"

The compiled TS code fails to find my references since it compiles to

var user_1 = require("interfaces/user");

and if I add "../" beforehand it will compile without problems

Any ideas what I'm doing wrong here?

xstefi · Accepted Answer · 2021-04-06 07:35:35Z

23

You can use tsconfig-paths, follow the instructions on tsconfig-paths:

mocha -r ts-node/register -r tsconfig-paths/register "test/**/*.ts"

answered Apr 6, 2021 at 7:35

xstefi

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General Grievance Over a year ago

For non-ts-node, the command may just be as simple as mocha -r tsconfig-paths/register, since I think test/**/*.ts is the default behavior.

Eliran Pe'er · Accepted Answer · 2017-10-06 20:27:12Z

3

You should use a mocha-TypeScript integration package, such as ts-mocha

answered Oct 6, 2017 at 20:27

Eliran Pe'er

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Comments

laszlo-horvath · Accepted Answer · 2023-06-14 11:07:38Z

2

In case you are using ts-mocha, it's using the tsconfig-paths package under the hood to resolve with the tsconfig paths but you have to enable it: TS_CONFIG_PATHS=true.

See the official documentation here: https://github.com/piotrwitek/ts-mocha#--programmatic-usage

answered Jun 14, 2023 at 11:07

laszlo-horvath

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Software Engineer · Accepted Answer · 2019-05-30 19:19:54Z

0

You should use a normal testing integration package (most popular one). such as moch-typescript. With that you only need to setup in test in package.json

script: 'mocha --ui mocha-typescript test.ts'

https://www.npmjs.com/package/mocha-typescript

I will give you a better example - test.ts

import { suite, test, slow, timeout } from "mocha-typescript";
@suite class Hello {
    @test world() {
        assert.equal(1, 2, "Expected one to equal two.");
    }
}

answered May 30, 2019 at 19:19

Software Engineer

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1 Comment

Diego Ruiz Over a year ago

mocha-typescript is now deprecated, try the package mentioned in Eliran Pe'er's answer

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