ng-mocks
An Angular testing library for creating mock services, components, directives, pipes and modules in unit tests. It provides shallow rendering, precise stubs to fake child dependencies. ng-mocks works with Angular 5 6 7 8 9 10 11 12 13 14 15 16 17 18, jasm
esmock
provides native ESM import and globals mocking for unit tests
jewire
Rewire private modules for use within Jest.
proxyquire
Proxies nodejs require in order to allow overriding dependencies during testing.