make max output settings

runner/runner.go

@@ -488,8 +488,12 @@ func (r *Runner) runTest(t *dsl.Test) *TestResult {
 		cmd.Stdin = strings.NewReader(*t.Stdin)
 	}
 
-	stdout := &cappedBuffer{limit: MaxOutputBytes}
-	stderr := &cappedBuffer{limit: MaxOutputBytes}
+	outLimit := MaxOutputBytes
+	if r.file.MaxOutput > 0 {
+		outLimit = int(r.file.MaxOutput)
+	}
+	stdout := &cappedBuffer{limit: outLimit}
+	stderr := &cappedBuffer{limit: outLimit}
 	cmd.Stdout = stdout
 	cmd.Stderr = stderr