2 * Copyright 2016 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 <gtest/gtest.h>
26 using namespace folly;
27 using namespace folly::dynamicconverter_detail;
29 TEST(DynamicConverter, template_metaprogramming) {
32 bool c1f = is_container<int>::value;
33 bool c2f = is_container<std::pair<int, int>>::value;
34 bool c3f = is_container<A>::value;
35 bool c4f = class_is_container<A>::value;
37 bool c1t = is_container<std::vector<int>>::value;
38 bool c2t = is_container<std::set<int>>::value;
39 bool c3t = is_container<std::map<int, int>>::value;
40 bool c4t = class_is_container<std::vector<A>>::value;
42 EXPECT_EQ(c1f, false);
43 EXPECT_EQ(c2f, false);
44 EXPECT_EQ(c3f, false);
45 EXPECT_EQ(c4f, false);
52 bool m1f = is_map<int>::value;
53 bool m2f = is_map<std::set<int>>::value;
55 bool m1t = is_map<std::map<int, int>>::value;
57 EXPECT_EQ(m1f, false);
58 EXPECT_EQ(m2f, false);
62 bool r1f = is_range<int>::value;
64 bool r1t = is_range<std::set<int>>::value;
65 bool r2t = is_range<std::vector<int>>::value;
67 EXPECT_EQ(r1f, false);
72 TEST(DynamicConverter, arithmetic_types) {
74 auto i1 = convertTo<int>(d1);
77 dynamic d2 = 123456789012345;
78 auto i2 = convertTo<int64_t>(d2);
79 EXPECT_EQ(i2, 123456789012345);
82 auto i4 = convertTo<float>(d4);
83 EXPECT_EQ((int)(i4*100), 314);
86 auto i5 = convertTo<bool>(d5);
90 const auto i6 = convertTo<const int>(d6);
94 auto i7 = convertTo<int>(d7);
98 auto i8 = convertTo<bool>(d8);
102 TEST(DynamicConverter, enums) {
103 enum enum1 { foo = 1, bar = 2 };
106 auto i1 = convertTo<enum1>(d1);
110 auto i2 = convertTo<enum1>(d2);
113 enum class enum2 { FOO = 1, BAR = 2 };
116 auto i3 = convertTo<enum2>(d3);
117 EXPECT_EQ(i3, enum2::FOO);
120 auto i4 = convertTo<enum2>(d4);
121 EXPECT_EQ(i4, enum2::BAR);
124 TEST(DynamicConverter, simple_builtins) {
125 dynamic d1 = "Haskell";
126 auto i1 = convertTo<folly::fbstring>(d1);
127 EXPECT_EQ(i1, "Haskell");
130 auto i2 = convertTo<std::string>(d2);
133 dynamic d3 = { 12, "Scala" };
134 auto i3 = convertTo<std::pair<int, std::string>>(d3);
135 EXPECT_EQ(i3.first, 12);
136 EXPECT_EQ(i3.second, "Scala");
138 dynamic d4 = dynamic::object("C", "C++");
139 auto i4 = convertTo<std::pair<std::string, folly::fbstring>>(d4);
140 EXPECT_EQ(i4.first, "C");
141 EXPECT_EQ(i4.second, "C++");
144 TEST(DynamicConverter, simple_fbvector) {
145 dynamic d1 = { 1, 2, 3 };
146 auto i1 = convertTo<folly::fbvector<int>>(d1);
147 decltype(i1) i1b = { 1, 2, 3 };
151 TEST(DynamicConverter, simple_container) {
152 dynamic d1 = { 1, 2, 3 };
153 auto i1 = convertTo<std::vector<int>>(d1);
154 decltype(i1) i1b = { 1, 2, 3 };
157 dynamic d2 = { 1, 3, 5, 2, 4 };
158 auto i2 = convertTo<std::set<int>>(d2);
159 decltype(i2) i2b = { 1, 2, 3, 5, 4 };
163 TEST(DynamicConverter, simple_map) {
164 dynamic d1 = dynamic::object(1, "one")(2, "two");
165 auto i1 = convertTo<std::map<int, std::string>>(d1);
166 decltype(i1) i1b = { { 1, "one" }, { 2, "two" } };
169 dynamic d2 = { { 3, "three" }, { 4, "four" } };
170 auto i2 = convertTo<std::unordered_map<int, std::string>>(d2);
171 decltype(i2) i2b = { { 3, "three" }, { 4, "four" } };
175 TEST(DynamicConverter, map_keyed_by_string) {
176 dynamic d1 = dynamic::object("1", "one")("2", "two");
177 auto i1 = convertTo<std::map<std::string, std::string>>(d1);
178 decltype(i1) i1b = { { "1", "one" }, { "2", "two" } };
181 dynamic d2 = { { "3", "three" }, { "4", "four" } };
182 auto i2 = convertTo<std::unordered_map<std::string, std::string>>(d2);
183 decltype(i2) i2b = { { "3", "three" }, { "4", "four" } };
187 TEST(DynamicConverter, map_to_vector_of_pairs) {
188 dynamic d1 = dynamic::object("1", "one")("2", "two");
189 auto i1 = convertTo<std::vector<std::pair<std::string, std::string>>>(d1);
190 std::sort(i1.begin(), i1.end());
191 decltype(i1) i1b = { { "1", "one" }, { "2", "two" } };
195 TEST(DynamicConverter, nested_containers) {
196 dynamic d1 = { { 1 }, { }, { 2, 3 } };
197 auto i1 = convertTo<folly::fbvector<std::vector<uint8_t>>>(d1);
198 decltype(i1) i1b = { { 1 }, { }, { 2, 3 } };
201 dynamic h2a = { "3", ".", "1", "4" };
202 dynamic h2b = { "2", ".", "7", "2" };
203 dynamic d2 = dynamic::object(3.14, h2a)(2.72, h2b);
204 auto i2 = convertTo<std::map<double, std::vector<folly::fbstring>>>(d2);
206 { { 3.14, { "3", ".", "1", "4" } },
207 { 2.72, { "2", ".", "7", "2" } } };
213 bool operator==(const A & o) const { return i == o.i; }
216 template <> struct DynamicConverter<A> {
217 static A convert(const dynamic & d) {
218 return { convertTo<int>(d["i"]) };
222 TEST(DynamicConverter, custom_class) {
223 dynamic d1 = dynamic::object("i", 17);
224 auto i1 = convertTo<A>(d1);
227 dynamic d2 = { dynamic::object("i", 18), dynamic::object("i", 19) };
228 auto i2 = convertTo<std::vector<A>>(d2);
229 decltype(i2) i2b = { { 18 }, { 19 } };
233 TEST(DynamicConverter, crazy) {
234 // we are going to create a vector<unordered_map<bool, T>>
235 // we will construct some of the maps from dynamic objects,
236 // some from a vector of KV pairs.
237 // T will be vector<set<string>>
239 std::set<std::string>
240 s1 = { "a", "e", "i", "o", "u" },
241 s2 = { "2", "3", "5", "7" },
242 s3 = { "Hello", "World" };
244 std::vector<std::set<std::string>>
249 std::unordered_map<bool, std::vector<std::set<std::string>>>
250 m1 = { { true, v1 }, { false, v2 } },
251 m2 = { { true, v3 } };
253 std::vector<std::unordered_map<bool, std::vector<std::set<std::string>>>>
258 ds1 = { "a", "e", "i", "o", "u" },
259 ds2 = { "2", "3", "5", "7" },
260 ds3 = { "Hello", "World" };
268 dm1 = dynamic::object(true, dv1)(false, dv2),
269 dm2 = { { true, dv3 } };
275 auto i = convertTo<std::vector<std::unordered_map<bool, std::vector<
276 std::set<std::string>>>>>(df1); // yes, that is 5 close-chevrons
281 TEST(DynamicConverter, consts) {
283 auto i1 = convertTo<const double>(d1);
286 dynamic d2 = "Hello";
287 auto i2 = convertTo<const std::string>(d2);
288 decltype(i2) i2b = "Hello";
292 auto i3 = convertTo<const bool>(d3);
296 auto i4 = convertTo<const bool>(d4);
299 dynamic d5 = { 1, 2 };
300 auto i5 = convertTo<const std::pair<const int, const int>>(d5);
301 decltype(i5) i5b = { 1, 2 };
309 explicit Token(int kind, const fbstring& lexeme)
310 : kind_(kind), lexeme_(lexeme) {}
314 template <> struct DynamicConverter<Token> {
315 static Token convert(const dynamic& d) {
316 int k = convertTo<int>(d["KIND"]);
317 fbstring lex = convertTo<fbstring>(d["LEXEME"]);
318 return Token(k, lex);
323 TEST(DynamicConverter, example) {
324 dynamic d1 = dynamic::object("KIND", 2)("LEXEME", "a token");
325 auto i1 = convertTo<Token>(d1);
326 EXPECT_EQ(i1.kind_, 2);
327 EXPECT_EQ(i1.lexeme_, "a token");
330 TEST(DynamicConverter, construct) {
336 vector<int> c { 1, 2, 3 };
337 dynamic d = { 1, 2, 3 };
338 EXPECT_EQ(d, toDynamic(c));
342 map<int, int> c { { 2, 4 }, { 3, 9 } };
343 dynamic d = dynamic::object(2, 4)(3, 9);
344 EXPECT_EQ(d, toDynamic(c));
348 map<string, string> c { { "a", "b" } };
349 dynamic d = dynamic::object("a", "b");
350 EXPECT_EQ(d, toDynamic(c));
354 map<string, pair<string, int>> c { { "a", { "b", 3 } } };
355 dynamic d = dynamic::object("a", dynamic { "b", 3 });
356 EXPECT_EQ(d, toDynamic(c));
360 map<string, pair<string, int>> c { { "a", { "b", 3 } } };
361 dynamic d = dynamic::object("a", dynamic { "b", 3 });
362 EXPECT_EQ(d, toDynamic(c));
366 vector<int> vi { 2, 3, 4, 5 };
367 auto c = std::make_pair(range(vi.begin(), vi.begin() + 3),
368 range(vi.begin() + 1, vi.begin() + 4));
369 dynamic d = { { 2, 3, 4 }, { 3, 4, 5 } };
370 EXPECT_EQ(d, toDynamic(c));
374 TEST(DynamicConverter, errors) {
375 const auto int32Over =
376 static_cast<int64_t>(std::numeric_limits<int32_t>().max()) + 1;
377 const auto floatOver =
378 static_cast<double>(std::numeric_limits<float>().max()) * 2;
380 dynamic d1 = int32Over;
381 EXPECT_THROW(convertTo<int32_t>(d1), std::range_error);
383 dynamic d2 = floatOver;
384 EXPECT_THROW(convertTo<float>(d2), std::range_error);