USING: concurrency.count-downs threads kernel tools.test ;
IN: concurrency.count-downs.tests`
-{ } [ 0 <count-down> await ] unit-test
+[ ] [ 0 <count-down> await ] unit-test
[ 1 <count-down> dup count-down count-down ] must-fail
-{ } [
+[ ] [
1 <count-down>
3 <count-down>
2dup [ await count-down ] 2curry "Master" spawn drop