Add new JSON API for better abstraction and for supporting strict JSON parsing

1 files changed, 151 insertions, 0 deletions

diff --git a/test/libdevcore/JSON.cpp b/test/libdevcore/JSON.cpp
new file mode 100644
index 00000000..39d71b42
--- /dev/null
+++ b/test/libdevcore/JSON.cpp
@@ -0,0 +1,151 @@
+/*
+	This file is part of solidity.
+
+	solidity is free software: you can redistribute it and/or modify
+	it under the terms of the GNU General Public License as published by
+	the Free Software Foundation, either version 3 of the License, or
+	(at your option) any later version.
+
+	solidity is distributed in the hope that it will be useful,
+	but WITHOUT ANY WARRANTY; without even the implied warranty of
+	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+	GNU General Public License for more details.
+
+	You should have received a copy of the GNU General Public License
+	along with solidity.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/**
+ * @date 2018
+ * Unit tests for JSON.h.
+ */
+
+#include <libdevcore/JSON.h>
+
+#include "../TestHelper.h"
+
+using namespace std;
+
+namespace dev
+{
+namespace test
+{
+
+BOOST_AUTO_TEST_SUITE(JsonTest)
+
+BOOST_AUTO_TEST_CASE(json_pretty_print)
+{
+	Json::Value json;
+	Json::Value jsonChild;
+
+	jsonChild["3.1"] = "3.1";
+	jsonChild["3.2"] = 2;
+	json["1"] = 1;
+	json["2"] = "2";
+	json["3"] = jsonChild;
+
+	BOOST_CHECK(
+	"{\n"
+	"  \"1\" : 1,\n"
+	"  \"2\" : \"2\",\n"
+	"  \"3\" : \n"
+	"  {\n"
+	"    \"3.1\" : \"3.1\",\n"
+	"    \"3.2\" : 2\n"
+	"  }\n"
+	"}" == jsonPrettyPrint(json));
+}
+
+BOOST_AUTO_TEST_CASE(json_compact_print)
+{
+	Json::Value json;
+	Json::Value jsonChild;
+
+	jsonChild["3.1"] = "3.1";
+	jsonChild["3.2"] = 2;
+	json["1"] = 1;
+	json["2"] = "2";
+	json["3"] = jsonChild;
+
+	BOOST_CHECK("{\"1\":1,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":2}}" == jsonCompactPrint(json));
+}
+
+BOOST_AUTO_TEST_CASE(parse_json_not_strict)
+{
+	Json::Value json;
+	std::string errors;
+
+	// just parse a valid json input
+	BOOST_CHECK(jsonParse("{\"1\":1,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":2}}", json, &errors));
+	BOOST_CHECK(json["1"] == 1);
+	BOOST_CHECK(json["2"] == "2");
+	BOOST_CHECK(json["3"]["3.1"] == "3.1");
+	BOOST_CHECK(json["3"]["3.2"] == 2);
+
+	// trailing garbage is allowed here
+	BOOST_CHECK(jsonParse("{\"1\":2,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":3}}}}}}}}}}", json, &errors));
+	BOOST_CHECK(json["1"] == 2);
+	BOOST_CHECK(json["2"] == "2");
+	BOOST_CHECK(json["3"]["3.1"] == "3.1");
+	BOOST_CHECK(json["3"]["3.2"] == 3);
+
+	// comments are allowed
+	BOOST_CHECK(jsonParse(
+		"{\"1\":3, // awesome comment\n\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":4}}", json, &errors
+	));
+	BOOST_CHECK(json["1"] == 3);
+	BOOST_CHECK(json["2"] == "2");
+	BOOST_CHECK(json["3"]["3.1"] == "3.1");
+	BOOST_CHECK(json["3"]["3.2"] == 4);
+
+	// root element other than object or array is allowed
+	BOOST_CHECK(jsonParse("[]", json, &errors));
+	BOOST_CHECK(jsonParse("{}", json, &errors));
+	BOOST_CHECK(jsonParse("1", json, &errors));
+	BOOST_CHECK(json == 1);
+	BOOST_CHECK(jsonParse("\"hello\"", json, &errors));
+	BOOST_CHECK(json == "hello");
+
+	// non-UTF-8 escapes allowed
+	BOOST_CHECK(jsonParse("[ \"\x80\xec\x80\" ]", json, &errors));
+	BOOST_CHECK(json[0] == "\x80\xec\x80");
+}
+
+BOOST_AUTO_TEST_CASE(parse_json_strict)
+{
+	Json::Value json;
+	std::string errors;
+
+	// just parse a valid json input
+	BOOST_CHECK(jsonParseStrict("{\"1\":1,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":2}}", json, &errors));
+	BOOST_CHECK(json["1"] == 1);
+	BOOST_CHECK(json["2"] == "2");
+	BOOST_CHECK(json["3"]["3.1"] == "3.1");
+	BOOST_CHECK(json["3"]["3.2"] == 2);
+
+	// trailing garbage is not allowed in strict-mode
+	BOOST_CHECK(!jsonParseStrict("{\"1\":2,\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":3}}}}}}}}}}", json, &errors));
+
+	// comments are allowed in strict-mode? - that's strange...
+	BOOST_CHECK(jsonParseStrict(
+		"{\"1\":3, // awesome comment\n\"2\":\"2\",\"3\":{\"3.1\":\"3.1\",\"3.2\":5}}", json, &errors
+	));
+	BOOST_CHECK(json["1"] == 3);
+	BOOST_CHECK(json["2"] == "2");
+	BOOST_CHECK(json["3"]["3.1"] == "3.1");
+	BOOST_CHECK(json["3"]["3.2"] == 5);
+
+	// root element can only be object or array
+	BOOST_CHECK(jsonParseStrict("[]", json, &errors));
+	BOOST_CHECK(jsonParseStrict("{}", json, &errors));
+	BOOST_CHECK(!jsonParseStrict("1", json, &errors));
+	BOOST_CHECK(!jsonParseStrict("\"hello\"", json, &errors));
+
+	// non-UTF-8 escapes allowed??
+	BOOST_CHECK(jsonParseStrict("[ \"\x80\xec\x80\" ]", json, &errors));
+	BOOST_CHECK(json[0] == "\x80\xec\x80");
+}
+
+BOOST_AUTO_TEST_SUITE_END()
+
+}
+}