From 6e8791912ff4b3480acaa350c628404f04aefa47 Mon Sep 17 00:00:00 2001
From: Niels Lohmann <niels.lohmann@gmail.com>
Date: Thu, 22 Dec 2016 09:09:40 +0100
Subject: [PATCH] :construction: added fuzzer from OSS-Fuzz

---
 test/fuzz_test/parse_fuzzer.cc | 36 ++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 test/fuzz_test/parse_fuzzer.cc

diff --git a/test/fuzz_test/parse_fuzzer.cc b/test/fuzz_test/parse_fuzzer.cc
new file mode 100644
index 00000000..bb8b3d37
--- /dev/null
+++ b/test/fuzz_test/parse_fuzzer.cc
@@ -0,0 +1,36 @@
+// Copyright 2016 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <iostream>
+#include <sstream>
+#include <json.hpp>
+
+using json = nlohmann::json;
+
+extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
+  try {
+    std::stringstream s;
+    s << json::parse(data, data + size);
+    try {
+      auto j = json::parse(s.str());
+      std::stringstream s2;
+      s2 << j;
+      assert(s.str() == s2.str());
+      assert(j == json::parse(s.str()));
+    } catch (const std::invalid_argument&) { 
+      assert(0);
+    }
+  } catch (const std::invalid_argument&) { }
+  return 0;
+}