How can I exclude files from code coverage from the beginning of the filename

Question

Using Jest, I want to exclude files from coverage according to the beginning of their filename, regardless of the depth with which the file sits in a directory structure.

Let's say I have something like this:

• src
  • form
    • controls
      • lookups
        • Lookup.component.js
        • FormLookup.component.js
      • input
        • Input.component.js
        • FormInput.component.js

I would want to exclude any component file beginning with Form from coverage. Something like

coveragePathIgnorePatterns: [
  'src/form/controls/**/*(^Form)*.component.js'
]

That doesn't work, but hopefully you get the gist of what it is I'm trying to accomplish

Answer 1

I use the not (!) operator on the collectCoverageFrom setting, and this seems to work for me:

collectCoverageFrom: [
    '<rootDir>/**/*.ts',
    '!<rootDir>/**/*.interface.ts',
    '!<rootDir>/**/*.mock.ts',
    '!<rootDir>/src/main.ts',
    '!<rootDir>/src/library/base/abstract-fetch-data-service.ts',

In that case, I believe you can simply add a line:

'!<rootDir>/src/form/controls/**/form*.component.js',