make max output settings

dsl/ast.go

@@ -19,6 +19,10 @@ type File struct {
 	Binary      string
 	Sources     string
 
+	// MaxOutput caps captured stdout/stderr per test (bytes). Zero means use the
+	// runner default. Raise it for suites whose expected output is large.
+	MaxOutput int64
+
 	NormalizeCRLF  bool
 	TrimTrailingWS bool