Why Does `go test` Show 'no tests to run' Despite Defined Functions?

Mistaken Test Function Naming

Despite having defined a test function, you are encountering the "no tests to run" message while executing go test. Let's investigate the cause of this issue.

The Go testing package expects test functions to adhere to a specific naming convention. As per the official documentation:

func TestXxx(t *testing.T) { ... }

In your case, the test function is named testNormalizePhoneNum, which does not conform to the above convention. The first letter of the function name must be uppercase ("T").

Solution:

To resolve this issue, simply rename your test function to TestNormalizePhoneNum (capitalizing the "T"). Once you have made this modification, running go test should execute your test cases successfully.

Alternative Method:

Alternatively, you can force the testing package to run your non-conventionally named test function using the -run flag:

go test -run=testNormalizePhoneNum

This flag allows you to specify the name of the test function (or a regular expression matching its name) that you want to execute. However, this approach is generally not recommended for routine testing purposes.

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