golang test coverage when tests are in a different package

To measure test coverage across different packages in Go, you can follow these steps:

1. Create a new file named main_test.go in the package where the tests are located.
2. Import the package that contains the code to be tested at the top of the main_test.go file.
3. Use the TestMain function to run the tests from the other package and calculate the coverage.
4. Within the TestMain function, call os.Exit(m.Run()) to run the tests and exit accordingly.
5. Use the built-in go test command with the -cover flag to execute the tests and display the coverage percentage.

Following these steps will allow you to measure test coverage when the tests are located in a different package.