Angular Ivy

Starting from v9.0.0+, jest-preset-angular is fully compatible with Angular Ivy. To make sure that Jest uses the Angular Ivy, you must run ngcc before running tests. ngcc will transform all Angular-format packages to be compatible with Ivy compiler.

jest-preset-angular also provides util script to help you to run ngcc with Jest but this script only works via the JavaScript version of Jest config

// jest.config.js
require('jest-preset-angular/ngcc-jest-processor');

module.exports = {
  // [...]
};