2 * Copyright 2014 Facebook, Inc.
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
8 * http://www.apache.org/licenses/LICENSE-2.0
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
17 // @author Nicholas Ormrod <njormrod@fb.com>
19 #include <folly/DynamicConverter.h>
22 #include <gflags/gflags.h>
23 #include <gtest/gtest.h>
27 #include <folly/Benchmark.h>
29 using namespace folly;
30 using namespace folly::dynamicconverter_detail;
32 TEST(DynamicConverter, template_metaprogramming) {
35 bool c1f = is_container<int>::value;
36 bool c2f = is_container<std::pair<int, int>>::value;
37 bool c3f = is_container<A>::value;
39 bool c1t = is_container<std::vector<int>>::value;
40 bool c2t = is_container<std::set<int>>::value;
41 bool c3t = is_container<std::map<int, int>>::value;
43 EXPECT_EQ(c1f, false);
44 EXPECT_EQ(c2f, false);
45 EXPECT_EQ(c3f, false);
51 bool m1f = is_map<int>::value;
52 bool m2f = is_map<std::set<int>>::value;
54 bool m1t = is_map<std::map<int, int>>::value;
56 EXPECT_EQ(m1f, false);
57 EXPECT_EQ(m2f, false);
61 bool r1f = is_range<int>::value;
63 bool r1t = is_range<std::set<int>>::value;
64 bool r2t = is_range<std::vector<int>>::value;
66 EXPECT_EQ(r1f, false);
71 TEST(DynamicConverter, arithmetic_types) {
73 auto i1 = convertTo<int>(d1);
76 dynamic d2 = 123456789012345;
77 auto i2 = convertTo<int64_t>(d2);
78 EXPECT_EQ(i2, 123456789012345);
81 auto i4 = convertTo<float>(d4);
82 EXPECT_EQ((int)(i4*100), 314);
85 auto i5 = convertTo<bool>(d5);
89 const auto i6 = convertTo<const int>(d6);
93 auto i7 = convertTo<int>(d7);
97 auto i8 = convertTo<bool>(d8);
101 TEST(DynamicConverter, simple_builtins) {
102 dynamic d1 = "Haskell";
103 auto i1 = convertTo<folly::fbstring>(d1);
104 EXPECT_EQ(i1, "Haskell");
107 auto i2 = convertTo<std::string>(d2);
110 dynamic d3 = { 12, "Scala" };
111 auto i3 = convertTo<std::pair<int, std::string>>(d3);
112 EXPECT_EQ(i3.first, 12);
113 EXPECT_EQ(i3.second, "Scala");
115 dynamic d4 = dynamic::object("C", "C++");
116 auto i4 = convertTo<std::pair<std::string, folly::fbstring>>(d4);
117 EXPECT_EQ(i4.first, "C");
118 EXPECT_EQ(i4.second, "C++");
121 TEST(DynamicConverter, simple_fbvector) {
122 dynamic d1 = { 1, 2, 3 };
123 auto i1 = convertTo<folly::fbvector<int>>(d1);
124 decltype(i1) i1b = { 1, 2, 3 };
128 TEST(DynamicConverter, simple_container) {
129 dynamic d1 = { 1, 2, 3 };
130 auto i1 = convertTo<std::vector<int>>(d1);
131 decltype(i1) i1b = { 1, 2, 3 };
134 dynamic d2 = { 1, 3, 5, 2, 4 };
135 auto i2 = convertTo<std::set<int>>(d2);
136 decltype(i2) i2b = { 1, 2, 3, 5, 4 };
140 TEST(DynamicConverter, simple_map) {
141 dynamic d1 = dynamic::object(1, "one")(2, "two");
142 auto i1 = convertTo<std::map<int, std::string>>(d1);
143 decltype(i1) i1b = { { 1, "one" }, { 2, "two" } };
146 dynamic d2 = { { 3, "three" }, { 4, "four" } };
147 auto i2 = convertTo<std::unordered_map<int, std::string>>(d2);
148 decltype(i2) i2b = { { 3, "three" }, { 4, "four" } };
152 TEST(DynamicConverter, map_keyed_by_string) {
153 dynamic d1 = dynamic::object("1", "one")("2", "two");
154 auto i1 = convertTo<std::map<std::string, std::string>>(d1);
155 decltype(i1) i1b = { { "1", "one" }, { "2", "two" } };
158 dynamic d2 = { { "3", "three" }, { "4", "four" } };
159 auto i2 = convertTo<std::unordered_map<std::string, std::string>>(d2);
160 decltype(i2) i2b = { { "3", "three" }, { "4", "four" } };
164 TEST(DynamicConverter, map_to_vector_of_pairs) {
165 dynamic d1 = dynamic::object("1", "one")("2", "two");
166 auto i1 = convertTo<std::vector<std::pair<std::string, std::string>>>(d1);
167 std::sort(i1.begin(), i1.end());
168 decltype(i1) i1b = { { "1", "one" }, { "2", "two" } };
172 TEST(DynamicConverter, nested_containers) {
173 dynamic d1 = { { 1 }, { }, { 2, 3 } };
174 auto i1 = convertTo<folly::fbvector<std::vector<uint8_t>>>(d1);
175 decltype(i1) i1b = { { 1 }, { }, { 2, 3 } };
178 dynamic h2a = { "3", ".", "1", "4" };
179 dynamic h2b = { "2", ".", "7", "2" };
180 dynamic d2 = dynamic::object(3.14, h2a)(2.72, h2b);
181 auto i2 = convertTo<std::map<double, std::vector<folly::fbstring>>>(d2);
183 { { 3.14, { "3", ".", "1", "4" } },
184 { 2.72, { "2", ".", "7", "2" } } };
190 bool operator==(const A & o) const { return i == o.i; }
193 template <> struct DynamicConverter<A> {
194 static A convert(const dynamic & d) {
195 return { convertTo<int>(d["i"]) };
199 TEST(DynamicConverter, custom_class) {
200 dynamic d1 = dynamic::object("i", 17);
201 auto i1 = convertTo<A>(d1);
204 dynamic d2 = { dynamic::object("i", 18), dynamic::object("i", 19) };
205 auto i2 = convertTo<std::vector<A>>(d2);
206 decltype(i2) i2b = { { 18 }, { 19 } };
210 TEST(DynamicConverter, crazy) {
211 // we are going to create a vector<unordered_map<bool, T>>
212 // we will construct some of the maps from dynamic objects,
213 // some from a vector of KV pairs.
214 // T will be vector<set<string>>
216 std::set<std::string>
217 s1 = { "a", "e", "i", "o", "u" },
218 s2 = { "2", "3", "5", "7" },
219 s3 = { "Hello", "World" };
221 std::vector<std::set<std::string>>
226 std::unordered_map<bool, std::vector<std::set<std::string>>>
227 m1 = { { true, v1 }, { false, v2 } },
228 m2 = { { true, v3 } };
230 std::vector<std::unordered_map<bool, std::vector<std::set<std::string>>>>
235 ds1 = { "a", "e", "i", "o", "u" },
236 ds2 = { "2", "3", "5", "7" },
237 ds3 = { "Hello", "World" };
245 dm1 = dynamic::object(true, dv1)(false, dv2),
246 dm2 = { { true, dv3 } };
252 auto i = convertTo<std::vector<std::unordered_map<bool, std::vector<
253 std::set<std::string>>>>>(df1); // yes, that is 5 close-chevrons
258 TEST(DynamicConverter, consts) {
260 auto i1 = convertTo<const double>(d1);
263 dynamic d2 = "Hello";
264 auto i2 = convertTo<const std::string>(d2);
265 decltype(i2) i2b = "Hello";
269 auto i3 = convertTo<const bool>(d3);
273 auto i4 = convertTo<const bool>(d4);
276 dynamic d5 = { 1, 2 };
277 auto i5 = convertTo<const std::pair<const int, const int>>(d5);
278 decltype(i5) i5b = { 1, 2 };
286 explicit Token(int kind, const fbstring& lexeme)
287 : kind_(kind), lexeme_(lexeme) {}
291 template <> struct DynamicConverter<Token> {
292 static Token convert(const dynamic& d) {
293 int k = convertTo<int>(d["KIND"]);
294 fbstring lex = convertTo<fbstring>(d["LEXEME"]);
295 return Token(k, lex);
300 TEST(DynamicConverter, example) {
301 dynamic d1 = dynamic::object("KIND", 2)("LEXEME", "a token");
302 auto i1 = convertTo<Token>(d1);
303 EXPECT_EQ(i1.kind_, 2);
304 EXPECT_EQ(i1.lexeme_, "a token");
307 TEST(DynamicConverter, construct) {
313 vector<int> c { 1, 2, 3 };
314 dynamic d = { 1, 2, 3 };
315 EXPECT_EQ(d, toDynamic(c));
319 map<int, int> c { { 2, 4 }, { 3, 9 } };
320 dynamic d = dynamic::object(2, 4)(3, 9);
321 EXPECT_EQ(d, toDynamic(c));
325 map<string, string> c { { "a", "b" } };
326 dynamic d = dynamic::object("a", "b");
327 EXPECT_EQ(d, toDynamic(c));
331 map<string, pair<string, int>> c { { "a", { "b", 3 } } };
332 dynamic d = dynamic::object("a", dynamic { "b", 3 });
333 EXPECT_EQ(d, toDynamic(c));
337 map<string, pair<string, int>> c { { "a", { "b", 3 } } };
338 dynamic d = dynamic::object("a", dynamic { "b", 3 });
339 EXPECT_EQ(d, toDynamic(c));
343 vector<int> vi { 2, 3, 4, 5 };
344 auto c = std::make_pair(range(vi.begin(), vi.begin() + 3),
345 range(vi.begin() + 1, vi.begin() + 4));
346 dynamic d = { { 2, 3, 4 }, { 3, 4, 5 } };
347 EXPECT_EQ(d, toDynamic(c));
351 TEST(DynamicConverter, errors) {
352 const auto int32Over =
353 static_cast<int64_t>(std::numeric_limits<int32_t>().max()) + 1;
354 const auto floatOver =
355 static_cast<double>(std::numeric_limits<float>().max()) * 2;
357 dynamic d1 = int32Over;
358 EXPECT_THROW(convertTo<int32_t>(d1), std::range_error);
360 dynamic d2 = floatOver;
361 EXPECT_THROW(convertTo<float>(d2), std::range_error);
364 int main(int argc, char ** argv) {
365 testing::InitGoogleTest(&argc, argv);
366 google::ParseCommandLineFlags(&argc, &argv, true);
367 if (FLAGS_benchmark) {
368 folly::runBenchmarks();
370 return RUN_ALL_TESTS();