Mutation Testing for Angular with Stryker: When 100% Coverage Still Tests Nothing

A few weeks ago I wrote about mutation testing for Java with PIT: why 100% line coverage can still catch nothing, and how deliberately injecting small bugs, mutants, measures whether your tests would actually notice. If you want the full case for why coverage lies, start there. This post is the other half of the stack: the same sensor, applied to Angular with Stryker Mutator. The frontend is w...