Why Does `go test` Show 'No Tests to Run' When Test Functions Exist?

Go Test Displays "No Tests to Run" Despite Test Function

In Go, the go test command searches for test functions in the provided package to execute. These functions must adhere to specific naming conventions to be recognized.

Problem Description

A user encountered the "no tests to run" error message when running go test on a main_test.go file containing the following test function:

func testNormalizePhoneNum(t *testing.T) {
    // Test cases
}

Resolution

The error stems from the test function's incorrect naming convention. As per the documentation, test functions must begin with an uppercase "T" to be recognized. Renaming the function to TestNormalizePhoneNum fixes the issue.

Alternative Solution

Alternatively, the user can force the test function to run even if it doesn't adhere to the naming convention by using the -run flag:

go test -run=testNormalizePhoneNum

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