Generate coverage for uncovered source files #2892
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Summary
The coverage tool of Jest did not generate the coverage for files that were not covered at all. E.g. files that are completely untested. The bad news: A lot of commands are left untested and the total coverage is significantly lower than before. The good news: after this change, you can actually see which commands require more tests which others might be able to contribute!
To trigger coverage for all files, the option
collectCoverageFromcan be used per jestjs/jest#1211 (comment)Test plan
Run
yarn testand opencoverage/lcov-report/index.htmlin a browser of your preference. Observe that a lot of commands are now showing 0% coverage. The previous coverage report did not include these empty coverage files.