Add fuzz tests for utils (#1982)

Makefile

@@ -160,3 +160,6 @@ pathfinder: juno-cached
     	--p2p-peers=/ip4/127.0.0.1/tcp/8888/p2p/12D3KooWF1JrZWQoBiBSjsFSuLbDiDvqcmJQRLaFQLmpVkHA9duk \
     	--p2p-private-key="54a695e2a5d5717d5ba8730efcafe6f17251a1955733cffc55a4085fbf7f5d2c1b4009314092069ef7ca9b364ce3eb3072531c64dfb2799c6bad76720a5bdff0" \
     	--metrics-port=9094
+
+test-fuzz: ## run fuzzing script
+	./scripts/fuzz_all.sh

scripts/fuzz_all.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+
+set -e
+
+fuzzTime=${1:-10}
+
+files=$(grep -r --include='**_test.go' --files-with-matches 'func Fuzz' .)
+
+for file in ${files}
+do
+	funcs=$(grep -o 'func Fuzz\w*' $file | sed 's/func //')
+	for func in ${funcs}
+	do
+		echo "Fuzzing $func in $file"
+		parentDir=$(dirname $file)
+		go test $parentDir -run=$func -fuzz=$func -fuzztime=${fuzzTime}s
+	done
+done

utils/compression_test.go

@@ -19,3 +19,13 @@ func TestGzip64(t *testing.T) {
 	require.NoError(t, err)
 	assert.Equal(t, bytes, decompBytes)
 }
+
+func FuzzGzip64(f *testing.F) {
+	f.Fuzz(func(t *testing.T, data []byte) {
+		compressed, err := utils.Gzip64Encode(data)
+		require.NoError(t, err)
+		decompressed, err := utils.Gzip64Decode(compressed)
+		require.NoError(t, err)
+		assert.Equal(t, data, decompressed)
+	})
+}