Fixed

Works for me. Thanks!

Fixed

This is caused by initial solution declaring validParentheses. It should be ValidParentheses (with V).
I'll fix the initial solution, but you should be able to submit by changing that in your solution.

I cannot submit my solution.

When I run simple tests I get that error:

Test Results:
Build Failed
# codewarrior/kata_test
./kata_test.go:6:3: imported and not used: "codewarrior/kata"
./kata_test.go:11:16: undefined: ValidParentheses
./kata_test.go:12:16: undefined: ValidParentheses

if I click on Attempt button I get that:

Test Results:
Build Failed
 STDERR
# codewarrior/kata_test
./kata_test.go:10:3: imported and not used: "codewarrior/kata"
./kata_test.go:15:16: undefined: ValidParentheses
./kata_test.go:16:16: undefined: ValidParentheses
./kata_test.go:17:16: undefined: ValidParentheses
./kata_test.go:18:16: undefined: ValidParentheses
./kata_test.go:19:16: undefined: ValidParentheses
./kata_test.go:20:16: undefined: ValidParentheses
./kata_test.go:24:16: undefined: ValidParentheses
./kata_test.go:25:16: undefined: ValidParentheses
./kata_test.go:26:16: undefined: ValidParentheses
./kata_test.go:26:16: too many errors