Jest typescript tests runs twice, one for ts files, and one for js files

Question

I'm starting to write some tests using Jest and typescript, however I'm getting some errors and the problem seems to be that the tests are run twice, one for ts files, and a second time for js files.

The typescript test passes, but the compiled javascript tests don't.

yarn run v1.5.1
$ jest
 PASS  src/__tests__/some.test.ts (7.955s)
  ● Console

    console.log src/lib/google-analytics/ga-api.ts:75
      Succsess!!
    console.log src/__tests__/some.test.ts:42
      { reports: { batchGet: [Function: batchGet] } }

 FAIL  dist/__tests__/some.test.js
  ● Console

    console.log dist/lib/google-analytics/ga-api.js:64
      Reject

  ● it gets a full google analytics report

    No key or keyFile set.

      68 |
      69 |         return new Promise((resolve, reject) => {
    > 70 |             jwtClient.authorize((err: any) => {
      71 |                 if (err) {
      72 |                     console.log("Reject");
      73 |                     reject(err);

      at GoogleToken.<anonymous> (node_modules/googleapis/node_modules/gtoken/src/index.ts:102:13)
      at step (node_modules/googleapis/node_modules/gtoken/build/src/index.js:42:23)
      at Object.next (node_modules/googleapis/node_modules/gtoken/build/src/index.js:23:53)
      at node_modules/googleapis/node_modules/gtoken/build/src/index.js:17:71
      at Object.<anonymous>.__awaiter (node_modules/googleapis/node_modules/gtoken/build/src/index.js:13:12)
      at GoogleToken.Object.<anonymous>.GoogleToken.getTokenAsync (node_modules/googleapis/node_modules/gtoken/build/src/index.js:102:16)
      at GoogleToken.Object.<anonymous>.GoogleToken.getToken (node_modules/googleapis/node_modules/gtoken/src/index.ts:93:17)
      at JWT.<anonymous> (node_modules/googleapis/node_modules/google-auth-library/src/auth/jwtclient.ts:181:37)
      at step (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:57:23)
      at Object.next (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:38:53)
      at node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:32:71
      at Object.<anonymous>.__awaiter (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:28:12)
      at JWT.Object.<anonymous>.JWT.refreshToken (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:181:16)
      at JWT.<anonymous> (node_modules/googleapis/node_modules/google-auth-library/src/auth/jwtclient.ts:154:31)
      at step (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:57:23)
      at Object.next (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:38:53)
      at node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:32:71
      at Object.<anonymous>.__awaiter (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:28:12)
      at JWT.Object.<anonymous>.JWT.authorizeAsync (node_modules/googleapis/node_modules/google-auth-library/build/src/auth/jwtclient.js:156:16)
      at JWT.Object.<anonymous>.JWT.authorize (node_modules/googleapis/node_modules/google-auth-library/src/auth/jwtclient.ts:147:12)
      at Promise (src/lib/google-analytics/ga-api.ts:70:23)
      at GoogleAnalyticsApiClient.getGCPAuthToken (src/lib/google-analytics/ga-api.ts:69:16)
      at GoogleAnalyticsApiClient.<anonymous> (src/lib/google-analytics/ga-api.ts:52:42)
      at dist/lib/google-analytics/ga-api.js:7:71
      at Object.<anonymous>.__awaiter (dist/lib/google-analytics/ga-api.js:3:12)
      at GoogleAnalyticsApiClient.getGaApiClient (dist/lib/google-analytics/ga-api.js:50:16)
      at Object.<anonymous>.test (src/__tests__/some.test.ts:41:14)

Test Suites: 1 failed, 1 passed, 2 total
Tests:       1 failed, 1 passed, 2 total
Snapshots:   0 total
Time:        9.516s
Ran all test suites.
error An unexpected error occurred: "Command failed.
Exit code: 1
Command: sh
Arguments: -c jest
Directory: /Users/carlosbernal/Documents/Grability/DataScience/ga-downloader
Output:
".
info If you think this is a bug, please open a bug report with the information provided in "/Users/carlosbernal/Documents/Grability/DataScience/ga-downloader/yarn-error.log".
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Is this normal in ts-jest or am I missing some extra configuration?

Answer 1

Is this normal in ts-jest or am I missing some extra configuration

You should set roots to /src only. Here is a good config:

module.exports = {
  "roots": [
    "<rootDir>/src"
  ],
  "transform": {
    "^.+\\.tsx?$": "ts-jest"
  },
  "testRegex": "(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$",
  "moduleFileExtensions": [
    "ts",
    "tsx",
    "json"
  ],
}

I also only test .tsx? files (no .jsx?) ;)

Answer 2

Had the same issue, using the aws cdk in Typescript, to prevent it, I added .js to the testPathIgnorePatterns property in jest-config.js

module.exports = {
  preset: 'ts-jest',
  testEnvironment: 'node',
  testPathIgnorePatterns: [".d.ts", ".js"]
};