test: add default case when no arguments provided to a rule (#1140)

testdata/cognitive_complexity_default.go

@@ -0,0 +1,13 @@
+package pkg
+
+func l() { // MATCH /function l has cognitive complexity 8 (> max enabled 7)/
+	for i := 1; i <= max; i++ {
+		for j := 2; j < i; j++ {
+			if (i%j == 0) || (i%j == 1) {
+				continue
+			}
+			total += i
+		}
+	}
+	return total && max
+}