How Can I Accurately Measure Coverage in Go Integration Tests?

Measuring Test Coverage in Go Integration Tests

When conducting integration tests on a Go REST API, using go test -cover may yield a misleading 0% test coverage. This is because the tests, which reside outside the service packages, are not recognized by the go tool cover.

However, the -coverpkg directive provides a solution by measuring test coverage within a specific package, regardless of whether the tests belong to that package. This allows for accurate coverage reports of service packages, such as:

In contrast, using go test -cover would report:

This demonstrates the effectiveness of -coverpkg in isolating coverage measurement to the desired package, in this case, mypackage. Although this may not be the optimal approach to integration testing coverage, it provides a valuable insight into code coverage for specific modules.

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