type script reference path is not getting resolved in jest

[pallabrath]

In one of the ts file (query_ctrl.ts) the module import are like below

///

import { QueryCtrl } from 'app/plugins/sdk';
export class MyQueryCtrl extends QueryCtrl
{ .....

In module.ts
export {
MyQueryCtrl as QueryCtrl
};
While in jest test module.test.ts
import { QueryCtrl } from '../../datasource/module'

● Test suite failed to run

Cannot find module 'app/plugins/sdk' from 'query_ctrl.ts'

Require stack:
src/datasource/query_ctrl.ts
src/datasource/module.ts
src/specs/datasource/module.test.ts

6 | import { Utils } from './Utils';

7 | import { QueryCtrl } from 'app/plugins/sdk';
| ^

9 |
10 |

at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:296:11)
at Object. (src/datasource/query_ctrl.ts:7:1)

jest.config.js

module.exports = {
preset: 'ts-jest',
testEnvironment: 'node',
coverageDirectory: "work/coverage",
};

[pallabrath]

Its something out of scope for jest # jestjs/jest#9805

[ahnpnl]

You can try moduleNameMapper in jest config. The error is about jest can’t find your file with that path. This issue is not ts-jest issue.

[pallabrath]

I have tried with moduleNameMapper
moduleNameMapper: {
"app/plugins/sdk" : "/node_modules/grafana-sdk-mocks/app/headers/common.d.ts",
}
But it didn't work for me

[ahnpnl]

you need to set proper rootDir to be able to use moduleNameMapper. But I don't think using type definition directly like that will work. Because moduleNameMapper only works with ts or js.

In general, when using moduleNameMapper, it should be not pointing to d.ts. Type declaration file is helpful for type checking and IDE suggestion, but not for resolving import modules

[pallabrath]

ok, i did, it too did not work.
moduleNameMapper: {
"app/plugins/sdk" : "/node_modules/grafana-sdk-mocks/app/headers/common.d.ts",
}
So any way i can make ts-jest work ? same time grunt-typescript is workinng

[ahnpnl]

why don't you point to common.ts or common.js ?

[pallabrath]

unfortunately, I don't see the corresponding .ts file. I found only the .d.ts file where all the classes are getting export https://github.com/grafana/grafana-sdk-mocks/blob/master/app/headers/common.d.ts

[ahnpnl]

hmm do you mind share a minimum repo so I can take a look ? :)