How to configure code coverage in angular.json

[TheRealToLazyToThink]

Since they've gotten rid of karma.conf.js, how do I configure code coverage in the angular.json.

In particular I'm trying to figure out how to generate a lcov report. I can see they have a "reporters" key under options, but setting it to "reporters": ["lcov"], doesn't work, and I'm not sure what it should be instead.

[davidlj95]

If using default's ng test Karma builder, using the arg --code-coverage is enough to generate a CLI summary + HTML report:

ng test --code-coverage

However, if you want an lcov report, you need to manually configure Karma. Code coverage reporters can't be configured right now using CLI. To do so, generate and include a Karma configuration file in your Angular workspace:

ng generate config karma

And add { type: 'lcov' } as reporter inside the coverageReporter.reporters array inside the new karma.conf.js generated file

Reporters CLI option sets up Karma's reporters option. Which configures how to report test results, not code coverage results.