ng-mocks error: MockBuilder/test.deep.spec.ts is missing from the TypeScript compilation

Question

I simply the ng-mocks module like I have to previous projects but today I am getting the following error.:

Firefox 78.0 (Linux x86_64) ERROR
  An error was thrown in afterAll
  Error: Module build failed (from ./node_modules/@ngtools/webpack/src/index.js):
  Error: ....node_modules/ng-mocks/examples/MockBuilder/test.deep.spec.ts is missing from the TypeScript compilation. Please make sure it is in your tsconfig via the 'files' or 'include' property.
  The missing file seems to be part of a third party library. TS files in published libraries are often a sign of a badly packaged library. Please open an issue in the library repository to alert its author and ask them to package the library using the Angular Package Format .

Answer 1

in your tsconfig.json you need to exclude node_modules.

{
  "exclude": ["node_modules"],
}