+// this is a testx
+s = ws! (TestCases:: TestCase */ ws) ws!
+Input = "input" grammar.Quoted ";" /ws
+Output = "output" grammar.Quoted ";" /ws
+Outputs:: = Output */ ws
+TestCase:: = "testcase" grammar.Quoted "{"
+ Input
+ Outputs
+ (SubGrammar:: grammar.Grammar)
+ "}" /ws