chore: do not bundle @jest/types

[mrazauskas]

Fixes #12772

Summary

#12772 seems to get fixed, if definitions of @jest/types are not bundled.

---

tsc generates the following definitions for @jest/reporters:

import type { Config } from '@jest/types';
export declare const utils: {
  formatTestPath: (config: import("@jest/types/build/Config").GlobalConfig | import("@jest/types/build/Config").ProjectConfig, testPath: string) => string;
  printDisplayName: (config: import("@jest/types/build/Config").ProjectConfig) => string;
  // ...
};

The bundler turns them into:

import {GlobalConfig} from '@jest/types/build/Config';
import {ProjectConfig} from '@jest/types/build/Config';
export declare const utils: {
  formatTestPath: (
    config: GlobalConfig | ProjectConfig,
    testPath: string,
  ) => string;
  printDisplayName: (config: ProjectConfig) => string;
}

Test plan

Needs a test.

[mrazauskas]

Interesting. If star exports in @jest/types are refactored into namespaces, here is what we get:

tsc generates the following definitions for @jest/reporters (better, it does not reach into build):

export type { Config } from '@jest/types';
export declare const utils: {
  formatTestPath: (config: import("@jest/types").Config.GlobalConfig | import("@jest/types").Config.ProjectConfig, testPath: string) => string;
  // ...
}

Unfortunately, bundling is still messed up:

import {Config} from '@jest/types';
export declare const utils: {
  formatTestPath: (config: Config | Config, testPath: string) => string;
  // Error: Cannot use namespace 'Config' as a type.
}

[mrazauskas]

Refactored utils import in @jest/reporters into a star import.

tsc generates:

import * as utils from './utils';
export type { Config } from '@jest/types';
export { utils };

Bundling goes like this:

import {Config} from '@jest/types';

declare const formatTestPath: (
  config: Config.GlobalConfig | Config.ProjectConfig,
  testPath: string,
) => string;

declare const printDisplayName: (config: Config.ProjectConfig) => string;

declare namespace utils {
  export {
    formatTestPath,
    printDisplayName,
    // ...
  };
}

export {utils};

Seems like it got fixed. I must write some tests.

[github-actions]

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