How to Measure Golang Integration Test Coverage for Specific Packages?

Measuring Golang Integration Test Coverage for Specific Packages

When testing REST APIs with integration tests, it's important to accurately measure the test coverage of the target code. By default, go test -cover may return 0% coverage for integration tests that are not part of the tested packages.

To address this, consider using the -coverpkg directive, which allows you to specify the package whose coverage should be measured. This directive is useful when the tests reside outside the target packages.

For example:

$ go test -cover -coverpkg mypackage ./src/api/...

This command will measure the test coverage of package mypackage even though the tests are located in a separate package.

By using -coverpkg, you can isolate the coverage measurement to the package of interest and obtain a more accurate representation of the code covered by your integration tests. This approach is particularly valuable when testing complex REST APIs with multiple endpoints and handlers.

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