Add more fuzzing

Signed-off-by: Alexey Palazhchenko <[email protected]>

Author: AlekSi

reverse_fuzz.go

@@ -0,0 +1,25 @@
+// +build gofuzz
+
+package pb_fuzz_workshop
+
+import (
+	"encoding/json"
+	"reflect"
+)
+
+func Fuzz(b []byte) int {
+	var s []int
+	if err := json.Unmarshal(b, &s); err != nil {
+		return 0
+	}
+
+	if reflect.DeepEqual(Reverse(s), s) {
+		return 0
+	}
+
+	if !reflect.DeepEqual(Reverse(Reverse(s)), s) {
+		panic("not equal")
+	}
+
+	return 1
+}

reverse_fuzz_test.go

@@ -2,6 +2,7 @@ package pb_fuzz_workshop
 
 import (
 	"encoding/json"
+	"reflect"
 	"testing"
 
 	"github.com/stretchr/testify/require"
@@ -12,6 +13,7 @@ func FuzzReverse(f *testing.F) {
 		nil,
 		{},
 		{1},
+		{1, 1},
 		{1, 2},
 		{1, 2, 3},
 	} {
@@ -28,6 +30,10 @@ func FuzzReverse(f *testing.F) {
 			t.Skip(err)
 		}
 
+		if reflect.DeepEqual(Reverse(s), s) {
+			t.Skip()
+		}
+
 		require.Equal(t, s, Reverse(Reverse(s)))
 		require.Equal(t, s, NotReverse(s))
 	})