/*
* Copyright (c) Meta Platforms, Inc. and affiliates.
*
* 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 <folly/json/json.h>
#include <cstdint>
#include <iterator>
#include <limits>
#include <folly/portability/GTest.h>
using folly::dynamic;
using folly::parseJson;
using folly::parseJsonWithMetadata;
using folly::toJson;
using folly::json::parse_error;
using folly::json::print_error;
TEST(Json, Unicode) {
auto val = parseJson(reinterpret_cast<const char*>(u8"\"I \u2665 UTF-8\""));
EXPECT_EQ(reinterpret_cast<const char*>(u8"I \u2665 UTF-8"), val.asString());
val = parseJson("\"I \\u2665 UTF-8\"");
EXPECT_EQ(reinterpret_cast<const char*>(u8"I \u2665 UTF-8"), val.asString());
val = parseJson(
reinterpret_cast<const char*>(u8"\"I \U0001D11E playing in G-clef\""));
EXPECT_EQ(
reinterpret_cast<const char*>(u8"I \U0001D11E playing in G-clef"),
val.asString());
val = parseJson("\"I \\uD834\\uDD1E playing in G-clef\"");
EXPECT_EQ(
reinterpret_cast<const char*>(u8"I \U0001D11E playing in G-clef"),
val.asString());
}
TEST(Json, Parse) {
auto num = parseJson("12");
EXPECT_TRUE(num.isInt());
EXPECT_EQ(num, 12);
num = parseJson("12e5");
EXPECT_TRUE(num.isDouble());
EXPECT_EQ(num, 12e5);
auto numAs1 = num.asDouble();
EXPECT_EQ(numAs1, 12e5);
EXPECT_EQ(num, 12e5);
EXPECT_EQ(num, 1200000);
auto largeNumber = parseJson("4611686018427387904");
EXPECT_TRUE(largeNumber.isInt());
EXPECT_EQ(largeNumber, 4611686018427387904LL);
auto negative = parseJson("-123");
EXPECT_EQ(negative, -123);
auto bfalse = parseJson("false");
auto btrue = parseJson("true");
EXPECT_EQ(bfalse, false);
EXPECT_EQ(btrue, true);
auto null = parseJson("null");
EXPECT_TRUE(null == nullptr);
auto doub1 = parseJson("12.0");
auto doub2 = parseJson("12e2");
EXPECT_EQ(doub1, 12.0);
EXPECT_EQ(doub2, 12e2);
EXPECT_EQ(
std::numeric_limits<double>::infinity(),
parseJson("Infinity").asDouble());
EXPECT_EQ(
-std::numeric_limits<double>::infinity(),
parseJson("-Infinity").asDouble());
EXPECT_TRUE(std::isnan(parseJson("NaN").asDouble()));
// case matters
EXPECT_THROW(parseJson("infinity"), parse_error);
EXPECT_THROW(parseJson("inf"), parse_error);
EXPECT_THROW(parseJson("Inf"), parse_error);
EXPECT_THROW(parseJson("INF"), parse_error);
EXPECT_THROW(parseJson("nan"), parse_error);
EXPECT_THROW(parseJson("NAN"), parse_error);
auto array = parseJson("[12,false, false , null , [12e4,32, [], 12]]");
EXPECT_EQ(array.size(), 5);
if (array.size() == 5) {
EXPECT_EQ(std::prev(array.end())->size(), 4);
}
EXPECT_THROW(parseJson("\n[12,\n\nnotvalidjson"), parse_error);
EXPECT_THROW(parseJson("12e2e2"), parse_error);
EXPECT_THROW(parseJson("{\"foo\":12,\"bar\":42} \"something\""), parse_error);
// clang-format off
dynamic value = dynamic::object
("foo", "bar")
("junk", 12)
("another", 32.2)
("a",
dynamic::array(
dynamic::object("a", "b")("c", "d"),
12.5,
"Yo Dawg",
dynamic::array("heh"),
nullptr));
// clang-format on
// Print then parse and get the same thing, hopefully.
EXPECT_EQ(value, parseJson(toJson(value)));
// Test an object with non-string values.
dynamic something =
parseJson("{\"old_value\":40,\"changed\":true,\"opened\":false}");
dynamic expected =
dynamic::object("old_value", 40)("changed", true)("opened", false);
EXPECT_EQ(something, expected);
}
TEST(Json, TestLineNumbers) {
// Simple object
folly::json::metadata_map map;
dynamic val = parseJsonWithMetadata("\n\n{\n\n\"value\":40}", &map);
EXPECT_TRUE(val.isObject());
auto ov = val.get_ptr("value");
EXPECT_TRUE(ov != nullptr);
auto it = map.find(ov);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 4);
EXPECT_EQ(it->second.value_range.begin.line, 4);
// check with find() API too
auto dv = val.find("value");
it = map.find(&dv->second);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 4);
EXPECT_EQ(it->second.value_range.begin.line, 4);
map.clear();
// One line apart
val = parseJsonWithMetadata(
"{\"old_value\":40,\n\"changed\":true,\n\"opened\":1.5}", &map);
EXPECT_TRUE(val.isObject());
auto i1 = val.get_ptr("old_value");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 0);
EXPECT_EQ(i1->asInt(), 40);
auto i2 = val.get_ptr("changed");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 1);
EXPECT_EQ(it->second.value_range.begin.line, 1);
EXPECT_EQ(i2->asBool(), true);
auto i3 = val.get_ptr("opened");
EXPECT_TRUE(i3 != nullptr);
it = map.find(i3);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 2);
EXPECT_EQ(it->second.value_range.begin.line, 2);
EXPECT_EQ(i3->asDouble(), 1.5);
map.clear();
// Multiple lines apart
val = parseJsonWithMetadata(
"\n{\n\"a\":40,\n\"b\":1.45,\n"
"\n\n\"c\":false,\n\n\n\n\n\"d\":\"dval\"\n\n}",
&map);
EXPECT_TRUE(val.isObject());
i1 = val.get_ptr("a");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 2);
EXPECT_EQ(it->second.value_range.begin.line, 2);
EXPECT_EQ(i1->asInt(), 40);
i2 = val.get_ptr("b");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 3);
EXPECT_EQ(it->second.value_range.begin.line, 3);
EXPECT_EQ(i2->asDouble(), 1.45);
i3 = val.get_ptr("c");
EXPECT_TRUE(i3 != nullptr);
it = map.find(i3);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 6);
EXPECT_EQ(it->second.value_range.begin.line, 6);
EXPECT_EQ(i3->asBool(), false);
auto i4 = val.get_ptr("d");
EXPECT_TRUE(i4 != nullptr);
it = map.find(i4);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 11);
EXPECT_EQ(it->second.value_range.begin.line, 11);
EXPECT_EQ(i4->asString(), "dval");
map.clear();
// All in the same line
val = parseJsonWithMetadata("{\"x\":40,\"y\":true,\"z\":3.33}", &map);
EXPECT_TRUE(val.isObject());
i1 = val.get_ptr("x");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 0);
EXPECT_EQ(i1->asInt(), 40);
i2 = val.get_ptr("y");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 0);
EXPECT_EQ(i2->asBool(), true);
i3 = val.get_ptr("z");
EXPECT_TRUE(i3 != nullptr);
it = map.find(i3);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 0);
map.clear();
// Key and value in different numbers
val =
parseJsonWithMetadata("{\"x\":\n70,\"y\":\n\n80,\n\"z\":\n\n\n33}", &map);
EXPECT_TRUE(val.isObject());
i1 = val.get_ptr("x");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 1);
EXPECT_EQ(i1->asInt(), 70);
i2 = val.get_ptr("y");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 1);
EXPECT_EQ(it->second.value_range.begin.line, 3);
EXPECT_EQ(i2->asInt(), 80);
i3 = val.get_ptr("z");
EXPECT_TRUE(i3 != nullptr);
it = map.find(i3);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 4);
EXPECT_EQ(it->second.value_range.begin.line, 7);
EXPECT_EQ(i3->asInt(), 33);
map.clear();
// With Arrays
val = parseJsonWithMetadata(
"{\"x\":\n[10, 20],\n\"y\":\n\n[80,\n90,\n100]}", &map);
EXPECT_TRUE(val.isObject());
i1 = val.get_ptr("x");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 1);
int i = 1;
for (auto arr_it = i1->begin(); arr_it != i1->end(); arr_it++, i++) {
auto arr_it_md = map.find(&*arr_it);
EXPECT_TRUE(arr_it_md != map.end());
EXPECT_EQ(arr_it_md->second.value_range.begin.line, 1);
EXPECT_EQ(arr_it->asInt(), 10 * i);
}
i2 = val.get_ptr("y");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 2);
EXPECT_EQ(it->second.value_range.begin.line, 4);
i = 8;
int ln = 4;
for (auto arr_it = i2->begin(); arr_it != i2->end(); arr_it++, i++, ln++) {
auto arr_it_md = map.find(&*arr_it);
EXPECT_TRUE(arr_it_md != map.end());
EXPECT_EQ(arr_it_md->second.value_range.begin.line, ln);
EXPECT_EQ(arr_it->asInt(), 10 * i);
}
map.clear();
// With nested objects
val = parseJsonWithMetadata(
"{\"a1\":{\n\"a2\":{\n\"a3\":{\n\"a4\":4}}}}", &map);
EXPECT_TRUE(val.isObject());
i1 = val.get_ptr("a1");
EXPECT_TRUE(i1 != nullptr);
it = map.find(i1);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 0);
EXPECT_EQ(it->second.value_range.begin.line, 0);
i2 = i1->get_ptr("a2");
EXPECT_TRUE(i2 != nullptr);
it = map.find(i2);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 1);
EXPECT_EQ(it->second.value_range.begin.line, 1);
i3 = i2->get_ptr("a3");
EXPECT_TRUE(i3 != nullptr);
it = map.find(i3);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 2);
EXPECT_EQ(it->second.value_range.begin.line, 2);
i4 = i3->get_ptr("a4");
EXPECT_TRUE(i4 != nullptr);
it = map.find(i4);
EXPECT_TRUE(it != map.end());
EXPECT_EQ(it->second.key_range.begin.line, 3);
EXPECT_EQ(it->second.value_range.begin.line, 3);
EXPECT_EQ(i4->asInt(), 4);
map.clear();
}
TEST(Json, DuplicateKeys) {
dynamic obj = dynamic::object("a", 1);
EXPECT_EQ(obj, parseJson("{\"a\": 1}"));
// Default behavior keeps *last* value.
EXPECT_EQ(obj, parseJson("{\"a\": 2, \"a\": 1}"));
EXPECT_THROW(
parseJson("{\"a\": 2, \"a\": 1}", {.validate_keys = true}), parse_error);
}
TEST(Json, ParseConvertInt) {
EXPECT_THROW(parseJson("{2: 4}"), parse_error);
dynamic obj = dynamic::object("2", 4);
EXPECT_EQ(obj, parseJson("{2: 4}", {.convert_int_keys = true}));
EXPECT_THROW(
parseJson("{2: 4, \"2\": 5}", {.convert_int_keys = true}), parse_error);
EXPECT_THROW(
parseJson("{2: 4, 2: 5}", {.convert_int_keys = true}), parse_error);
}
TEST(Json, PrintConvertInt) {
dynamic obj = dynamic::object(2, 4);
EXPECT_THROW(toJson(obj), print_error);
EXPECT_EQ(
"{2:4}", folly::json::serialize(obj, {.allow_non_string_keys = true}));
EXPECT_EQ(
"{\"2\":4}", folly::json::serialize(obj, {.convert_int_keys = true}));
EXPECT_EQ(
"{\"2\":4}",
folly::json::serialize(
obj,
{
.allow_non_string_keys = true,
.convert_int_keys = true,
}));
obj["2"] = 5; // Would lead to duplicate keys in output JSON.
EXPECT_THROW(
folly::json::serialize(
obj,
{
.allow_non_string_keys = true,
.convert_int_keys = true,
}),
print_error);
}
TEST(Json, ParseTrailingComma) {
folly::json::serialization_opts on, off;
on.allow_trailing_comma = true;
off.allow_trailing_comma = false;
dynamic arr = dynamic::array(1, 2);
EXPECT_EQ(arr, parseJson("[1, 2]", on));
EXPECT_EQ(arr, parseJson("[1, 2,]", on));
EXPECT_EQ(arr, parseJson("[1, 2, ]", on));
EXPECT_EQ(arr, parseJson("[1, 2 , ]", on));
EXPECT_EQ(arr, parseJson("[1, 2 ,]", on));
EXPECT_THROW(parseJson("[1, 2,]", off), parse_error);
dynamic obj = dynamic::object("a", 1);
EXPECT_EQ(obj, parseJson("{\"a\": 1}", on));
EXPECT_EQ(obj, parseJson("{\"a\": 1,}", on));
EXPECT_EQ(obj, parseJson("{\"a\": 1, }", on));
EXPECT_EQ(obj, parseJson("{\"a\": 1 , }", on));
EXPECT_EQ(obj, parseJson("{\"a\": 1 ,}", on));
EXPECT_THROW(parseJson("{\"a\":1,}", off), parse_error);
}
TEST(Json, BoolConversion) {
EXPECT_TRUE(parseJson("42").asBool());
}
TEST(Json, JavascriptSafe) {
auto badDouble = int64_t((1ULL << 63ULL) + 1);
dynamic badDyn = badDouble;
EXPECT_EQ(folly::toJson(badDouble), folly::to<std::string>(badDouble));
folly::json::serialization_opts opts;
opts.javascript_safe = true;
EXPECT_ANY_THROW(folly::json::serialize(badDouble, opts));
auto okDouble = int64_t(1ULL << 63ULL);
dynamic okDyn = okDouble;
EXPECT_EQ(folly::toJson(okDouble), folly::to<std::string>(okDouble));
}
TEST(Json, Produce) {
auto value = parseJson(R"( "f\"oo" )");
EXPECT_EQ(toJson(value), R"("f\"oo")");
value = parseJson("\"Control code: \001 \002 \x1f\"");
EXPECT_EQ(toJson(value), R"("Control code: \u0001 \u0002 \u001f")");
// We're not allowed to have non-string keys in json.
EXPECT_THROW(
toJson(dynamic::object("abc", "xyz")(42.33, "asd")), print_error);
// Check Infinity/Nan
folly::json::serialization_opts opts;
opts.allow_nan_inf = true;
EXPECT_EQ("Infinity", folly::json::serialize(parseJson("Infinity"), opts));
EXPECT_EQ("NaN", folly::json::serialize(parseJson("NaN"), opts));
}
TEST(Json, PrintExceptionErrorMessages) {
folly::json::serialization_opts opts;
opts.allow_nan_inf = false;
try {
const char* jsonWithInfValue =
"[{}, {}, {\"outerKey\":{\"innerKey\": Infinity}}]";
EXPECT_THROW(
toJson(folly::json::serialize(parseJson(jsonWithInfValue), opts)),
print_error);
toJson(folly::json::serialize(parseJson(jsonWithInfValue), opts));
} catch (const print_error& error) {
EXPECT_EQ(
std::string(
"folly::toJson: JSON object value was an INF when serializing value at 2->\"outerKey\"->\"innerKey\""),
error.what());
}
try {
const char* jsonWithNanValue = "[{\"outerKey\":{\"innerKey\": NaN}}]";
EXPECT_THROW(
toJson(folly::json::serialize(parseJson(jsonWithNanValue), opts)),
print_error);
toJson(folly::json::serialize(parseJson(jsonWithNanValue), opts));
} catch (const print_error& error) {
EXPECT_EQ(
std::string(
"folly::toJson: JSON object value was a NaN when serializing value at 0->\"outerKey\"->\"innerKey\""),
error.what());
}
try {
const dynamic jsonWithNonStringKey(
dynamic::object("abc", "xyz")(42.33, "asd"));
EXPECT_THROW(toJson(jsonWithNonStringKey), print_error);
toJson(jsonWithNonStringKey);
} catch (const print_error& error) {
EXPECT_EQ(
std::string(
"folly::toJson: JSON object key 42.33 was not a string when serializing key at 42.33"),
error.what());
}
}
TEST(Json, JsonEscape) {
folly::json::serialization_opts opts;
EXPECT_EQ(
folly::json::serialize("\b\f\n\r\x01\t\\\"/\v\a", opts),
R"("\b\f\n\r\u0001\t\\\"/\u000b\u0007")");
}
TEST(Json, EscapeCornerCases) {
// The escaping logic uses some bitwise operations to determine
// which bytes need escaping 8 bytes at a time. Test that this logic
// is correct regardless of positions by planting 2 characters that
// may need escaping at each possible position and checking the
// result, for varying string lengths.
folly::json::serialization_opts opts;
opts.validate_utf8 = true;
std::string s;
std::string expected;
for (bool ascii : {true, false}) {
opts.encode_non_ascii = ascii;
for (size_t len = 2; len < 32; ++len) {
for (size_t i = 0; i < len; ++i) {
for (size_t j = 0; j < len; ++j) {
if (i == j) {
continue;
}
s.clear();
expected.clear();
expected.push_back('"');
for (size_t pos = 0; pos < len; ++pos) {
if (pos == i) {
s.push_back('\\');
expected.append("\\\\");
} else if (pos == j) {
s.append("\xe2\x82\xac");
expected.append(ascii ? "\\u20ac" : "\xe2\x82\xac");
} else {
s.push_back('x');
expected.push_back('x');
}
}
expected.push_back('"');
EXPECT_EQ(folly::json::serialize(s, opts), expected) << ascii;
}
}
}
}
}
TEST(Json, JsonNonAsciiEncoding) {
folly::json::serialization_opts opts;
opts.encode_non_ascii = true;
// simple tests
EXPECT_EQ(folly::json::serialize("\x1f", opts), R"("\u001f")");
EXPECT_EQ(folly::json::serialize("\xc2\xa2", opts), R"("\u00a2")");
EXPECT_EQ(folly::json::serialize("\xe2\x82\xac", opts), R"("\u20ac")");
// multiple unicode encodings
EXPECT_EQ(
folly::json::serialize("\x1f\xe2\x82\xac", opts), R"("\u001f\u20ac")");
EXPECT_EQ(
folly::json::serialize("\x1f\xc2\xa2\xe2\x82\xac", opts),
R"("\u001f\u00a2\u20ac")");
EXPECT_EQ(
folly::json::serialize("\xc2\x80\xef\xbf\xbf", opts),
R"("\u0080\uffff")");
EXPECT_EQ(
folly::json::serialize("\xe0\xa0\x80\xdf\xbf", opts),
R"("\u0800\u07ff")");
// first possible sequence of a certain length
EXPECT_EQ(folly::json::serialize("\xc2\x80", opts), R"("\u0080")");
EXPECT_EQ(folly::json::serialize("\xe0\xa0\x80", opts), R"("\u0800")");
// last possible sequence of a certain length
EXPECT_EQ(folly::json::serialize("\xdf\xbf", opts), R"("\u07ff")");
EXPECT_EQ(folly::json::serialize("\xef\xbf\xbf", opts), R"("\uffff")");
// other boundary conditions
EXPECT_EQ(folly::json::serialize("\xed\x9f\xbf", opts), R"("\ud7ff")");
EXPECT_EQ(folly::json::serialize("\xee\x80\x80", opts), R"("\ue000")");
EXPECT_EQ(folly::json::serialize("\xef\xbf\xbd", opts), R"("\ufffd")");
// incomplete sequences
EXPECT_ANY_THROW(folly::json::serialize("a\xed\x9f", opts));
EXPECT_ANY_THROW(folly::json::serialize("b\xee\x80", opts));
EXPECT_ANY_THROW(folly::json::serialize("c\xef\xbf", opts));
// impossible bytes
EXPECT_ANY_THROW(folly::json::serialize("\xfe", opts));
EXPECT_ANY_THROW(folly::json::serialize("\xff", opts));
// Sample overlong sequences
EXPECT_ANY_THROW(folly::json::serialize("\xc0\xaf", opts));
EXPECT_ANY_THROW(folly::json::serialize("\xe0\x80\xaf", opts));
// Maximum overlong sequences
EXPECT_ANY_THROW(folly::json::serialize("\xc1\xbf", opts));
EXPECT_ANY_THROW(folly::json::serialize("\x30\x9f\xbf", opts));
// illegal code positions
EXPECT_ANY_THROW(folly::json::serialize("\xed\xa0\x80", opts));
EXPECT_ANY_THROW(folly::json::serialize("\xed\xbf\xbf", opts));
// Overlong representation of NUL character
EXPECT_ANY_THROW(folly::json::serialize("\xc0\x80", opts));
EXPECT_ANY_THROW(folly::json::serialize("\xe0\x80\x80", opts));
// Allow 4 byte encodings, escape using 2 UTF-16 surrogate pairs.
// "\xf0\x9f\x8d\x80" is Unicode Character 'FOUR LEAF CLOVER' (U+1F340)
// >>> json.dumps({"a": u"\U0001F340"})
// '{"a": "\\ud83c\\udf40"}'
EXPECT_EQ(
folly::json::serialize("\xf0\x9f\x8d\x80", opts), R"("\ud83c\udf40")");
// Longer than 4 byte encodings
EXPECT_ANY_THROW(folly::json::serialize("\xed\xaf\xbf\xed\xbf\xbf", opts));
}
TEST(Json, UTF8Retention) {
// test retention with valid utf8 strings
std::string input = reinterpret_cast<const char*>(u8"\u2665");
std::string jsonInput = folly::toJson(input);
std::string output = folly::parseJson(jsonInput).asString();
std::string jsonOutput = folly::toJson(output);
EXPECT_EQ(input, output);
EXPECT_EQ(jsonInput, jsonOutput);
// test retention with invalid utf8 - note that non-ascii chars are retained
// as is, and no unicode encoding is attempted so no exception is thrown.
EXPECT_EQ(
folly::toJson("a\xe0\xa0\x80z\xc0\x80"), "\"a\xe0\xa0\x80z\xc0\x80\"");
}
TEST(Json, UTF8EncodeNonAsciiRetention) {
folly::json::serialization_opts opts;
opts.encode_non_ascii = true;
// test encode_non_ascii valid utf8 strings
std::string input = reinterpret_cast<const char*>(u8"\u2665");
std::string jsonInput = folly::json::serialize(input, opts);
std::string output = folly::parseJson(jsonInput).asString();
std::string jsonOutput = folly::json::serialize(output, opts);
EXPECT_EQ(input, output);
EXPECT_EQ(jsonInput, jsonOutput);
// test encode_non_ascii with invalid utf8 - note that an attempt to encode
// non-ascii to unicode will result is a utf8 validation and throw exceptions.
EXPECT_ANY_THROW(folly::json::serialize("a\xe0\xa0\x80z\xc0\x80", opts));
EXPECT_ANY_THROW(folly::json::serialize("a\xe0\xa0\x80z\xe0\x80\x80", opts));
}
TEST(Json, UTF8Validation) {
folly::json::serialization_opts opts;
opts.validate_utf8 = true;
// test validate_utf8 valid utf8 strings - note that we only validate the
// for utf8 but don't encode non-ascii to unicode so they are retained as is.
EXPECT_EQ(folly::json::serialize("a\xc2\x80z", opts), "\"a\xc2\x80z\"");
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80z", opts), "\"a\xe0\xa0\x80z\"");
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80m\xc2\x80z", opts),
"\"a\xe0\xa0\x80m\xc2\x80z\"");
// test validate_utf8 with invalid utf8
EXPECT_ANY_THROW(folly::json::serialize("a\xe0\xa0\x80z\xc0\x80", opts));
EXPECT_ANY_THROW(folly::json::serialize("a\xe0\xa0\x80z\xe0\x80\x80", opts));
// not a valid unicode because it is larger than the max 0x10FFFF code-point
EXPECT_ANY_THROW(folly::json::serialize("\xF6\x8D\x9B\xBC", opts));
opts.skip_invalid_utf8 = true;
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80z\xc0\x80", opts),
reinterpret_cast<const char*>(u8"\"a\xe0\xa0\x80z\ufffd\ufffd\""));
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80z\xc0\x80\x80", opts),
reinterpret_cast<const char*>(u8"\"a\xe0\xa0\x80z\ufffd\ufffd\ufffd\""));
EXPECT_EQ(
folly::json::serialize("z\xc0\x80z\xe0\xa0\x80", opts),
reinterpret_cast<const char*>(u8"\"z\ufffd\ufffdz\xe0\xa0\x80\""));
EXPECT_EQ(
folly::json::serialize("\xF6\x8D\x9B\xBC", opts),
reinterpret_cast<const char*>(u8"\"\ufffd\ufffd\ufffd\ufffd\""));
EXPECT_EQ(
folly::json::serialize("invalid\xF6\x8D\x9B\xBCinbetween", opts),
reinterpret_cast<const char*>(
u8"\"invalid\ufffd\ufffd\ufffd\ufffdinbetween\""));
opts.encode_non_ascii = true;
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80z\xc0\x80", opts),
"\"a\\u0800z\\ufffd\\ufffd\"");
EXPECT_EQ(
folly::json::serialize("a\xe0\xa0\x80z\xc0\x80\x80", opts),
"\"a\\u0800z\\ufffd\\ufffd\\ufffd\"");
EXPECT_EQ(
folly::json::serialize("z\xc0\x80z\xe0\xa0\x80", opts),
"\"z\\ufffd\\ufffdz\\u0800\"");
}
TEST(Json, ParseNonStringKeys) {
// test string keys
EXPECT_EQ("a", parseJson("{\"a\":[]}").items().begin()->first.asString());
// check that we don't allow non-string keys as this violates the
// strict JSON spec (though it is emitted by the output of
// folly::dynamic with operator <<).
EXPECT_THROW(parseJson("{1:[]}"), parse_error);
// check that we can parse colloquial JSON if the option is set
folly::json::serialization_opts opts;
opts.allow_non_string_keys = true;
auto val = parseJson("{1:[]}", opts);
EXPECT_EQ(1, val.items().begin()->first.asInt());
// test we can still read in strings
auto sval = parseJson("{\"a\":[]}", opts);
EXPECT_EQ("a", sval.items().begin()->first.asString());
// test we can read in doubles
auto dval = parseJson("{1.5:[]}", opts);
EXPECT_EQ(1.5, dval.items().begin()->first.asDouble());
}
TEST(Json, ParseDoubleFallback) {
// default behavior
EXPECT_THROW(
parseJson("{\"a\":847605071342477600000000000000}"), std::range_error);
EXPECT_THROW(parseJson("{\"a\":-9223372036854775809}"), std::range_error);
EXPECT_THROW(parseJson("{\"a\":9223372036854775808}"), std::range_error);
EXPECT_EQ(
std::numeric_limits<int64_t>::min(),
parseJson("{\"a\":-9223372036854775808}")
.items()
.begin()
->second.asInt());
EXPECT_EQ(
std::numeric_limits<int64_t>::max(),
parseJson("{\"a\":9223372036854775807}").items().begin()->second.asInt());
// with double_fallback numbers outside int64_t range are parsed as double
folly::json::serialization_opts opts;
opts.double_fallback = true;
EXPECT_EQ(
847605071342477600000000000000.0,
parseJson("{\"a\":847605071342477600000000000000}", opts)
.items()
.begin()
->second.asDouble());
EXPECT_EQ(
847605071342477600000000000000.0,
parseJson("{\"a\": 847605071342477600000000000000}", opts)
.items()
.begin()
->second.asDouble());
EXPECT_EQ(
847605071342477600000000000000.0,
parseJson("{\"a\":847605071342477600000000000000 }", opts)
.items()
.begin()
->second.asDouble());
EXPECT_EQ(
847605071342477600000000000000.0,
parseJson("{\"a\": 847605071342477600000000000000 }", opts)
.items()
.begin()
->second.asDouble());
// show that some precision gets lost
EXPECT_EQ(
847605071342477612345678900000.0,
parseJson("{\"a\":847605071342477612345678912345}", opts)
.items()
.begin()
->second.asDouble());
EXPECT_DOUBLE_EQ(
-9223372036854775809.0,
parseJson("{\"a\":-9223372036854775809}", opts) // first smaller than min
.items()
.begin()
->second.asDouble());
EXPECT_DOUBLE_EQ(
9223372036854775808.0,
parseJson("{\"a\":9223372036854775808}", opts) // first larger than max
.items()
.begin()
->second.asDouble());
EXPECT_DOUBLE_EQ(
-10000000000000000000.0,
parseJson("{\"a\":-10000000000000000000}", opts) // minus + 20 digits
.items()
.begin()
->second.asDouble());
EXPECT_DOUBLE_EQ(
10000000000000000000.0,
parseJson("{\"a\":10000000000000000000}", opts) // 20 digits
.items()
.begin()
->second.asDouble());
// numbers within int64_t range are deserialized as int64_t, no loss
EXPECT_EQ(
std::numeric_limits<int64_t>::min(),
parseJson("{\"a\":-9223372036854775808}", opts)
.items()
.begin()
->second.asInt());
EXPECT_EQ(
std::numeric_limits<int64_t>::max(),
parseJson("{\"a\":9223372036854775807}", opts)
.items()
.begin()
->second.asInt());
EXPECT_EQ(
INT64_C(-1234567890123456789),
parseJson("{\"a\":-1234567890123456789}", opts) // minus + 19 digits
.items()
.begin()
->second.asInt());
EXPECT_EQ(
INT64_C(1234567890123456789),
parseJson("{\"a\":1234567890123456789}", opts) // 19 digits
.items()
.begin()
->second.asInt());
EXPECT_EQ(
INT64_C(-123456789012345678),
parseJson("{\"a\":-123456789012345678}", opts) // minus + 18 digits
.items()
.begin()
->second.asInt());
EXPECT_EQ(
INT64_C(123456789012345678),
parseJson("{\"a\":123456789012345678}", opts) // 18 digits
.items()
.begin()
->second.asInt());
EXPECT_EQ(
toJson(parseJson(R"({"a":-9223372036854775808})", opts)),
R"({"a":-9223372036854775808})");
EXPECT_EQ(
toJson(parseJson(R"({"a":9223372036854775807})", opts)),
R"({"a":9223372036854775807})");
EXPECT_EQ(
toJson(parseJson(R"({"a":-1234567890123456789})", opts)),
R"({"a":-1234567890123456789})");
EXPECT_EQ(
toJson(parseJson(R"({"a":1234567890123456789})", opts)),
R"({"a":1234567890123456789})");
EXPECT_EQ(
toJson(parseJson(R"({"a":-123456789012345678})", opts)),
R"({"a":-123456789012345678})");
EXPECT_EQ(
toJson(parseJson(R"({"a":123456789012345678})", opts)),
R"({"a":123456789012345678})");
}
TEST(Json, ParseNumbersAsStrings) {
folly::json::serialization_opts opts;
opts.parse_numbers_as_strings = true;
auto parse = [&](std::string number) {
return parseJson(number, opts).asString();
};
EXPECT_EQ("0", parse("0"));
EXPECT_EQ("1234", parse("1234"));
EXPECT_EQ("3.00", parse("3.00"));
EXPECT_EQ("3.14", parse("3.14"));
EXPECT_EQ("0.1234", parse("0.1234"));
EXPECT_EQ("0.0", parse("0.0"));
EXPECT_EQ(
"46845131213548676854213265486468451312135486768542132",
parse("46845131213548676854213265486468451312135486768542132"));
EXPECT_EQ(
"-468451312135486768542132654864684513121354867685.5e4",
parse("-468451312135486768542132654864684513121354867685.5e4"));
EXPECT_EQ("6.62607004e-34", parse("6.62607004e-34"));
EXPECT_EQ("6.62607004E+34", parse("6.62607004E+34"));
EXPECT_EQ("Infinity", parse("Infinity"));
EXPECT_EQ("-Infinity", parse("-Infinity"));
EXPECT_EQ("NaN", parse("NaN"));
EXPECT_THROW(parse("ThisIsWrong"), parse_error);
EXPECT_THROW(parse("34-2"), parse_error);
EXPECT_THROW(parse(""), parse_error);
EXPECT_THROW(parse("-"), parse_error);
EXPECT_THROW(parse("34-e2"), parse_error);
EXPECT_THROW(parse("34e2.4"), parse_error);
EXPECT_THROW(parse("infinity"), parse_error);
EXPECT_THROW(parse("nan"), parse_error);
}
TEST(Json, SortKeys) {
folly::json::serialization_opts opts_on, opts_off, opts_custom_sort;
opts_on.sort_keys = true;
opts_off.sort_keys = false;
opts_custom_sort.sort_keys = false; // should not be required
opts_custom_sort.sort_keys_by = [](folly::dynamic const& a,
folly::dynamic const& b) {
// just an inverse sort
return b < a;
};
// clang-format off
dynamic value = dynamic::object
("foo", "bar")
("junk", 12)
("another", 32.2)
("a",
dynamic::array(
dynamic::object("a", "b")("c", "d"),
12.5,
"Yo Dawg",
dynamic::array("heh"),
nullptr));
// clang-format on
// dynamic object uses F14NodeMap which may randomize the table iteration
// order; consequently, we must force the table iteration order to be
// different from sorted order so that we can deterministically test sorting
// below
auto get_top_keys = [&] {
std::vector<std::string> top_keys;
for (auto const& key : value.keys()) {
top_keys.push_back(key.asString());
}
return top_keys;
};
std::vector<std::string> sorted_top_keys = get_top_keys();
std::sort(sorted_top_keys.begin(), sorted_top_keys.end());
while (get_top_keys() == sorted_top_keys) {
for (size_t i = 0; i < 64; ++i) {
value.insert(folly::to<std::string>("fake-", i), i);
}
for (size_t i = 0; i < 64; ++i) {
value.erase(folly::to<std::string>("fake-", i));
}
}
std::string sorted_keys =
R"({"a":[{"a":"b","c":"d"},12.5,"Yo Dawg",["heh"],null],)"
R"("another":32.2,"foo":"bar","junk":12})";
std::string inverse_sorted_keys =
R"({"junk":12,"foo":"bar","another":32.2,)"
R"("a":[{"c":"d","a":"b"},12.5,"Yo Dawg",["heh"],null]})";
EXPECT_EQ(value, parseJson(folly::json::serialize(value, opts_on)));
EXPECT_EQ(value, parseJson(folly::json::serialize(value, opts_off)));
EXPECT_EQ(value, parseJson(folly::json::serialize(value, opts_custom_sort)));
EXPECT_EQ(sorted_keys, folly::json::serialize(value, opts_on));
EXPECT_NE(sorted_keys, folly::json::serialize(value, opts_off));
EXPECT_EQ(
inverse_sorted_keys, folly::json::serialize(value, opts_custom_sort));
}
TEST(Json, PrettyPrintIndent) {
folly::json::serialization_opts opts;
opts.sort_keys = true;
opts.pretty_formatting = true;
opts.pretty_formatting_indent_width = 4;
// clang-format off
dynamic value = dynamic::object
("foo", "bar")
("nested",
dynamic::object
("abc", "def")
("qrs", dynamic::array("tuv", 789))
("xyz", 123)
)
("zzz", 456)
;
// clang-format on
std::string expected = R"({
"foo": "bar",
"nested": {
"abc": "def",
"qrs": [
"tuv",
789
],
"xyz": 123
},
"zzz": 456
})";
EXPECT_EQ(expected, folly::json::serialize(value, opts));
}
TEST(Json, PrintTo) {
std::ostringstream oss;
// clang-format off
dynamic value = dynamic::object
("foo", "bar")
("junk", 12)
("another", 32.2)
(true, false) // include non-string keys
(false, true)
(2, 3)
(0, 1)
(1, 2)
(1.5, 2.25)
(0.5, 0.25)
(0, 1)
(1, 2)
("a",
dynamic::array(
dynamic::object("a", "b")
("c", "d"),
12.5,
"Yo Dawg",
dynamic::array("heh"),
nullptr
)
)
;
// clang-format on
std::string expected =
R"({
false: true,
true: false,
0: 1,
0.5: 0.25,
1: 2,
1.5: 2.25,
2: 3,
"a": [
{
"a": "b",
"c": "d"
},
12.5,
"Yo Dawg",
[
"heh"
],
null
],
"another": 32.2,
"foo": "bar",
"junk": 12
})";
PrintTo(value, &oss);
EXPECT_EQ(expected, oss.str());
}
TEST(Json, RecursionLimit) {
std::string in;
for (int i = 0; i < 1000; i++) {
in.append("{\"x\":");
}
in.append("\"hi\"");
for (int i = 0; i < 1000; i++) {
in.append("}");
}
EXPECT_ANY_THROW(parseJson(in));
folly::json::serialization_opts opts_high_recursion_limit;
opts_high_recursion_limit.recursion_limit = 10000;
parseJson(in, opts_high_recursion_limit);
}
TEST(Json, ExtraEscapes) {
folly::json::serialization_opts opts;
dynamic in = dynamic::object("a", "<foo@bar%baz?>");
// Only in second index, only first bit of that index.
opts.extra_ascii_to_escape_bitmap =
folly::json::buildExtraAsciiToEscapeBitmap("@");
auto serialized = folly::json::serialize(in, opts);
EXPECT_EQ("{\"a\":\"<foo\\u0040bar%baz?>\"}", serialized);
EXPECT_EQ(in, folly::parseJson(serialized));
// Only last bit.
opts.extra_ascii_to_escape_bitmap =
folly::json::buildExtraAsciiToEscapeBitmap("?");
serialized = folly::json::serialize(in, opts);
EXPECT_EQ("{\"a\":\"<foo@bar%baz\\u003f>\"}", serialized);
EXPECT_EQ(in, folly::parseJson(serialized));
// Multiple bits.
opts.extra_ascii_to_escape_bitmap =
folly::json::buildExtraAsciiToEscapeBitmap("<%@?");
serialized = folly::json::serialize(in, opts);
EXPECT_EQ("{\"a\":\"\\u003cfoo\\u0040bar\\u0025baz\\u003f>\"}", serialized);
EXPECT_EQ(in, folly::parseJson(serialized));
// Non-ASCII
in = dynamic::object("a", "a\xe0\xa0\x80z\xc0\x80");
opts.extra_ascii_to_escape_bitmap =
folly::json::buildExtraAsciiToEscapeBitmap("@");
serialized = folly::json::serialize(in, opts);
EXPECT_EQ("{\"a\":\"a\xe0\xa0\x80z\xc0\x80\"}", serialized);
EXPECT_EQ(in, folly::parseJson(serialized));
}
TEST(Json, CharsToUnicodeEscape) {
auto testPair = [](std::array<uint64_t, 2> arr, uint64_t zero, uint64_t one) {
EXPECT_EQ(zero, arr[0]);
EXPECT_EQ(one, arr[1]);
};
testPair(folly::json::buildExtraAsciiToEscapeBitmap(""), 0, 0);
// ?=63
testPair(folly::json::buildExtraAsciiToEscapeBitmap("?"), (1ULL << 63), 0);
// @=64
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("@"), 0, (1ULL << (64 - 64)));
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("?@"),
(1ULL << 63),
(1ULL << (64 - 64)));
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("@?"),
(1ULL << 63),
(1ULL << (64 - 64)));
// duplicates
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("@?@?"),
(1ULL << 63),
(1ULL << (64 - 64)));
// ?=63, @=64, $=36
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("?@$"),
(1ULL << 63) | (1ULL << 36),
(1ULL << (64 - 64)));
// ?=63, $=36, @=64, !=33
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("?@$!"),
(1ULL << 63) | (1ULL << 36) | (1ULL << 33),
(1ULL << (64 - 64)));
// ?=63, $=36, @=64, !=33, ]=93
testPair(
folly::json::buildExtraAsciiToEscapeBitmap("?@$!]"),
(1ULL << 63) | (1ULL << 36) | (1ULL << 33),
(1ULL << (64 - 64)) | (1ULL << (93 - 64)));
}
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