$func.TestName generates names that go vet rejects for non exported types.

[bjoerndemeyer]

For non exported function like foo.bar, $func.TestName generates Testfoo_bar which go vet gives a warning about. Please change this to generate a name that is acceptable,. For example, an underscore could be inserted there, so the name becomes Test_foo. Thanks!

This snippet could be a possible fix:

//TestName returns a name of the test
func (f *Func) TestName() string {
	name := "Test"

	if f.IsMethod() {
		recvType := f.ReceiverType()
		var ident *ast.Ident
		if star, ok := recvType.(*ast.StarExpr); ok {
			ident = star.X.(*ast.Ident)
		} else {
			ident = recvType.(*ast.Ident)
		}
		if !ident.IsExported() {
			name += "_"
		}
		name += ident.String()
		name += "_"
	} else if !f.Signature.Name.IsExported() {
		name += "_"
	}

	return name + f.Signature.Name.String()
}