vlib/v/checker/tests/a_test_file_with_0_test_fns_test.vv:1:1: error: a _test.v file should have *at least* one `test_` function
    1 | fn abc() {}
      | ^
Details: The name of a test function in V, should start with `test_`.
The test function should take 0 parameters, and no return type. Example:
fn test_xyz(){ assert 2 + 2 == 4 }
