folly/test/DynamicTest.cpp

   1 /*
   2  * Copyright 2015 Facebook, Inc.
   3  *
   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
   7  *
   8  *   http://www.apache.org/licenses/LICENSE-2.0
   9  *
  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.
  15  */
  16
  17 #include <folly/dynamic.h>
  18
  19 #include <boost/next_prior.hpp>
  20 #include <gflags/gflags.h>
  21 #include <gtest/gtest.h>
  22
  23 using folly::dynamic;
  24
  25 // This test runs without any external dependencies, including json.
  26 // This means that if there's a test failure, there's no way to print
  27 // a useful runtime representation of the folly::dynamic.  We will
  28 // live with this in order to test dependencies.  This method is
  29 // normally provided by json.cpp.
  30 void dynamic::print_as_pseudo_json(std::ostream& out) const {
  31   out << "<folly::dynamic object of type " << type_ << ">";
  32 }
  33
  34 TEST(Dynamic, ObjectBasics) {
  35   dynamic obj = dynamic::object("a", false);
  36   EXPECT_EQ(obj.at("a"), false);
  37   EXPECT_EQ(obj.size(), 1);
  38   obj.insert("a", true);
  39   EXPECT_EQ(obj.size(), 1);
  40   EXPECT_EQ(obj.at("a"), true);
  41   obj.at("a") = nullptr;
  42   EXPECT_EQ(obj.size(), 1);
  43   EXPECT_TRUE(obj.at("a") == nullptr);
  44
  45   dynamic newObject = dynamic::object;
  46
  47   newObject["z"] = 12;
  48   EXPECT_EQ(newObject.size(), 1);
  49   newObject["a"] = true;
  50   EXPECT_EQ(newObject.size(), 2);
  51
  52   EXPECT_EQ(*newObject.keys().begin(), newObject.items().begin()->first);
  53   EXPECT_EQ(*newObject.values().begin(), newObject.items().begin()->second);
  54   std::vector<std::pair<folly::fbstring, dynamic>> found;
  55   found.emplace_back(newObject.keys().begin()->asString(),
  56                      *newObject.values().begin());
  57
  58   EXPECT_EQ(*boost::next(newObject.keys().begin()),
  59             boost::next(newObject.items().begin())->first);
  60   EXPECT_EQ(*boost::next(newObject.values().begin()),
  61             boost::next(newObject.items().begin())->second);
  62   found.emplace_back(boost::next(newObject.keys().begin())->asString(),
  63                      *boost::next(newObject.values().begin()));
  64
  65   std::sort(found.begin(), found.end());
  66
  67   EXPECT_EQ("a", found[0].first);
  68   EXPECT_TRUE(found[0].second.asBool());
  69
  70   EXPECT_EQ("z", found[1].first);
  71   EXPECT_EQ(12, found[1].second.asInt());
  72
  73   dynamic obj2 = dynamic::object;
  74   EXPECT_TRUE(obj2.isObject());
  75
  76   dynamic d3 = nullptr;
  77   EXPECT_TRUE(d3 == nullptr);
  78   d3 = dynamic::object;
  79   EXPECT_TRUE(d3.isObject());
  80   d3["foo"] = { 1, 2, 3 };
  81   EXPECT_EQ(d3.count("foo"), 1);
  82
  83   d3[123] = 321;
  84   EXPECT_EQ(d3.at(123), 321);
  85
  86   d3["123"] = 42;
  87   EXPECT_EQ(d3.at("123"), 42);
  88   EXPECT_EQ(d3.at(123), 321);
  89
  90   dynamic objInsert = folly::dynamic::object();
  91   dynamic objA = folly::dynamic::object("1", "2");
  92   dynamic objB = folly::dynamic::object("1", "2");
  93
  94   objInsert.insert("1", std::move(objA));
  95   objInsert.insert("1", std::move(objB));
  96
  97   EXPECT_EQ(objInsert.find("1")->second.size(), 1);
  98
  99   // We don't allow objects as keys in objects.
 100   EXPECT_ANY_THROW(newObject[d3] = 12);
 101 }
 102
 103 TEST(Dynamic, ObjectErase) {
 104   dynamic obj = dynamic::object("key1", "val")
 105                                ("key2", "val2");
 106   EXPECT_EQ(obj.count("key1"), 1);
 107   EXPECT_EQ(obj.count("key2"), 1);
 108   EXPECT_EQ(obj.erase("key1"), 1);
 109   EXPECT_EQ(obj.count("key1"), 0);
 110   EXPECT_EQ(obj.count("key2"), 1);
 111   EXPECT_EQ(obj.erase("key1"), 0);
 112   obj["key1"] = 12;
 113   EXPECT_EQ(obj.count("key1"), 1);
 114   EXPECT_EQ(obj.count("key2"), 1);
 115   auto it = obj.find("key2");
 116   obj.erase(it);
 117   EXPECT_EQ(obj.count("key1"), 1);
 118   EXPECT_EQ(obj.count("key2"), 0);
 119
 120   obj["asd"] = 42.0;
 121   obj["foo"] = 42.0;
 122   EXPECT_EQ(obj.size(), 3);
 123   auto ret = obj.erase(boost::next(obj.items().begin()), obj.items().end());
 124   EXPECT_TRUE(ret == obj.items().end());
 125   EXPECT_EQ(obj.size(), 1);
 126   obj.erase(obj.items().begin());
 127   EXPECT_TRUE(obj.empty());
 128 }
 129
 130 TEST(Dynamic, ArrayErase) {
 131   dynamic arr = { 1, 2, 3, 4, 5, 6 };
 132
 133   EXPECT_THROW(arr.erase(1), std::exception);
 134   EXPECT_EQ(arr.size(), 6);
 135   EXPECT_EQ(arr[0], 1);
 136   arr.erase(arr.begin());
 137   EXPECT_EQ(arr.size(), 5);
 138
 139   arr.erase(boost::next(arr.begin()), boost::prior(arr.end()));
 140   EXPECT_EQ(arr.size(), 2);
 141   EXPECT_EQ(arr[0], 2);
 142   EXPECT_EQ(arr[1], 6);
 143 }
 144
 145 TEST(Dynamic, StringBasics) {
 146   dynamic str = "hello world";
 147   EXPECT_EQ(11, str.size());
 148   EXPECT_FALSE(str.empty());
 149   str = "";
 150   EXPECT_TRUE(str.empty());
 151 }
 152
 153 TEST(Dynamic, ArrayBasics) {
 154   dynamic array = { 1, 2, 3 };
 155   EXPECT_EQ(array.size(), 3);
 156   EXPECT_EQ(array.at(0), 1);
 157   EXPECT_EQ(array.at(1), 2);
 158   EXPECT_EQ(array.at(2), 3);
 159
 160   EXPECT_ANY_THROW(array.at(-1));
 161   EXPECT_ANY_THROW(array.at(3));
 162
 163   array.push_back("foo");
 164   EXPECT_EQ(array.size(), 4);
 165
 166   array.resize(12, "something");
 167   EXPECT_EQ(array.size(), 12);
 168   EXPECT_EQ(array[11], "something");
 169 }
 170
 171 TEST(Dynamic, DeepCopy) {
 172   dynamic val = { "foo", "bar", { "foo1", "bar1" } };
 173   EXPECT_EQ(val.at(2).at(0), "foo1");
 174   EXPECT_EQ(val.at(2).at(1), "bar1");
 175   dynamic val2 = val;
 176   EXPECT_EQ(val2.at(2).at(0), "foo1");
 177   EXPECT_EQ(val2.at(2).at(1), "bar1");
 178   EXPECT_EQ(val.at(2).at(0), "foo1");
 179   EXPECT_EQ(val.at(2).at(1), "bar1");
 180   val2.at(2).at(0) = "foo3";
 181   val2.at(2).at(1) = "bar3";
 182   EXPECT_EQ(val.at(2).at(0), "foo1");
 183   EXPECT_EQ(val.at(2).at(1), "bar1");
 184   EXPECT_EQ(val2.at(2).at(0), "foo3");
 185   EXPECT_EQ(val2.at(2).at(1), "bar3");
 186
 187   dynamic obj = dynamic::object("a", "b")
 188                                ("c", {"d", "e", "f"})
 189                                ;
 190   EXPECT_EQ(obj.at("a"), "b");
 191   dynamic obj2 = obj;
 192   obj2.at("a") = {1, 2, 3};
 193   EXPECT_EQ(obj.at("a"), "b");
 194   dynamic expected = {1, 2, 3};
 195   EXPECT_EQ(obj2.at("a"), expected);
 196 }
 197
 198 TEST(Dynamic, Operator) {
 199   bool caught = false;
 200   try {
 201     dynamic d1 = dynamic::object;
 202     dynamic d2 = dynamic::object;
 203     auto foo = d1 < d2;
 204   } catch (std::exception const& e) {
 205     caught = true;
 206   }
 207   EXPECT_TRUE(caught);
 208
 209   dynamic foo = "asd";
 210   dynamic bar = "bar";
 211   dynamic sum = foo + bar;
 212   EXPECT_EQ(sum, "asdbar");
 213
 214   dynamic some = 12;
 215   dynamic nums = 4;
 216   dynamic math = some / nums;
 217   EXPECT_EQ(math, 3);
 218 }
 219
 220 TEST(Dynamic, Conversions) {
 221   dynamic str = "12.0";
 222   EXPECT_EQ(str.asDouble(), 12.0);
 223   EXPECT_ANY_THROW(str.asInt());
 224   EXPECT_ANY_THROW(str.asBool());
 225
 226   str = "12";
 227   EXPECT_EQ(str.asInt(), 12);
 228   EXPECT_EQ(str.asDouble(), 12.0);
 229   str = "0";
 230   EXPECT_EQ(str.asBool(), false);
 231   EXPECT_EQ(str.asInt(), 0);
 232   EXPECT_EQ(str.asDouble(), 0);
 233   EXPECT_EQ(str.asString(), "0");
 234
 235   dynamic num = 12;
 236   EXPECT_EQ("12", num.asString());
 237   EXPECT_EQ(12.0, num.asDouble());
 238 }
 239
 240 TEST(Dynamic, GetSetDefaultTest) {
 241   dynamic d1 = dynamic::object("foo", "bar");
 242   EXPECT_EQ(d1.getDefault("foo", "baz"), "bar");
 243   EXPECT_EQ(d1.getDefault("quux", "baz"), "baz");
 244
 245   dynamic d2 = dynamic::object("foo", "bar");
 246   EXPECT_EQ(d2.setDefault("foo", "quux"), "bar");
 247   d2.setDefault("bar", dynamic({})).push_back(42);
 248   EXPECT_EQ(d2["bar"][0], 42);
 249
 250   dynamic d3 = dynamic::object, empty = dynamic::object;
 251   EXPECT_EQ(d3.getDefault("foo"), empty);
 252   d3.setDefault("foo")["bar"] = "baz";
 253   EXPECT_EQ(d3["foo"]["bar"], "baz");
 254
 255   // we do not allow getDefault/setDefault on arrays
 256   dynamic d4 = dynamic({});
 257   EXPECT_ANY_THROW(d4.getDefault("foo", "bar"));
 258   EXPECT_ANY_THROW(d4.setDefault("foo", "bar"));
 259 }
 260
 261 TEST(Dynamic, ObjectForwarding) {
 262   // Make sure dynamic::object can be constructed the same way as any
 263   // dynamic.
 264   dynamic d = dynamic::object("asd", {"foo", "bar"});
 265   dynamic d2 = dynamic::object("key2", {"value", "words"})
 266                               ("key", "value1");
 267 }
 268
 269 TEST(Dynamic, GetPtr) {
 270   dynamic array = { 1, 2, "three" };
 271   EXPECT_TRUE(array.get_ptr(0));
 272   EXPECT_FALSE(array.get_ptr(-1));
 273   EXPECT_FALSE(array.get_ptr(3));
 274   EXPECT_EQ(dynamic("three"), *array.get_ptr(2));
 275   const dynamic& carray = array;
 276   EXPECT_EQ(dynamic("three"), *carray.get_ptr(2));
 277
 278   dynamic object = dynamic::object("one", 1)("two", 2);
 279   EXPECT_TRUE(object.get_ptr("one"));
 280   EXPECT_FALSE(object.get_ptr("three"));
 281   EXPECT_EQ(dynamic(2), *object.get_ptr("two"));
 282   *object.get_ptr("one") = 11;
 283   EXPECT_EQ(dynamic(11), *object.get_ptr("one"));
 284   const dynamic& cobject = object;
 285   EXPECT_EQ(dynamic(2), *cobject.get_ptr("two"));
 286 }
 287
 288 TEST(Dynamic, Assignment) {
 289   const dynamic ds[] = { { 1, 2, 3 },
 290                          dynamic::object("a", true),
 291                          24,
 292                          26.5,
 293                          true,
 294                          "hello", };
 295   const dynamic dd[] = { { 5, 6 },
 296                          dynamic::object("t", "T")(1, 7),
 297                          9000,
 298                          3.14159,
 299                          false,
 300                          "world", };
 301   for (const auto& source : ds) {
 302     for (const auto& dest : dd) {
 303       dynamic tmp(dest);
 304       EXPECT_EQ(tmp, dest);
 305       tmp = source;
 306       EXPECT_EQ(tmp, source);
 307     }
 308   }
 309 }
 310
 311 folly::fbstring make_long_string() {
 312   return folly::fbstring(100, 'a');
 313 }
 314
 315 TEST(Dynamic, GetDefault) {
 316   const auto s = make_long_string();
 317   dynamic ds(s);
 318   dynamic tmp(s);
 319   dynamic d1 = dynamic::object("key1", s);
 320   dynamic d2 = dynamic::object("key2", s);
 321   dynamic d3 = dynamic::object("key3", s);
 322   dynamic d4 = dynamic::object("key4", s);
 323   // lvalue - lvalue
 324   dynamic ayy("ayy");
 325   EXPECT_EQ(ds, d1.getDefault("key1", ayy));
 326   EXPECT_EQ(ds, d1.getDefault("key1", ayy));
 327   EXPECT_EQ(ds, d1.getDefault("not-a-key", tmp));
 328   EXPECT_EQ(ds, tmp);
 329   // lvalue - rvalue
 330   EXPECT_EQ(ds, d1.getDefault("key1", "ayy"));
 331   EXPECT_EQ(ds, d1.getDefault("key1", "ayy"));
 332   EXPECT_EQ(ds, d1.getDefault("not-a-key", std::move(tmp)));
 333   EXPECT_NE(ds, tmp);
 334   // rvalue - lvalue
 335   tmp = s;
 336   EXPECT_EQ(ds, std::move(d1).getDefault("key1", ayy));
 337   EXPECT_NE(ds, d1["key1"]);
 338   EXPECT_EQ(ds, std::move(d2).getDefault("not-a-key", tmp));
 339   EXPECT_EQ(dynamic(dynamic::object("key2", s)), d2);
 340   EXPECT_EQ(ds, tmp);
 341   // rvalue - rvalue
 342   EXPECT_EQ(ds, std::move(d3).getDefault("key3", std::move(tmp)));
 343   EXPECT_NE(ds, d3["key3"]);
 344   EXPECT_EQ(ds, tmp);
 345   EXPECT_EQ(ds, std::move(d4).getDefault("not-a-key", std::move(tmp)));
 346   EXPECT_EQ(dynamic(dynamic::object("key4", s)), d4);
 347   EXPECT_NE(ds, tmp);
 348 }
 349
 350 TEST(Dynamic, GetString) {
 351   const dynamic c(make_long_string());
 352   dynamic d(make_long_string());
 353   dynamic m(make_long_string());
 354
 355   auto s = make_long_string();
 356
 357   EXPECT_EQ(s, c.getString());
 358   EXPECT_EQ(s, c.getString());
 359
 360   d.getString() += " hello";
 361   EXPECT_EQ(s + " hello", d.getString());
 362   EXPECT_EQ(s + " hello", d.getString());
 363
 364   EXPECT_EQ(s, std::move(m).getString());
 365   EXPECT_NE(dynamic(s), m);
 366 }
 367
 368 TEST(Dynamic, GetSmallThings) {
 369   const dynamic cint(5);
 370   const dynamic cdouble(5.0);
 371   const dynamic cbool(true);
 372   dynamic dint(5);
 373   dynamic ddouble(5.0);
 374   dynamic dbool(true);
 375   dynamic mint(5);
 376   dynamic mdouble(5.0);
 377   dynamic mbool(true);
 378
 379   EXPECT_EQ(5, cint.getInt());
 380   dint.getInt() = 6;
 381   EXPECT_EQ(6, dint.getInt());
 382   EXPECT_EQ(5, std::move(mint).getInt());
 383
 384   EXPECT_EQ(5.0, cdouble.getDouble());
 385   ddouble.getDouble() = 6.0;
 386   EXPECT_EQ(6.0, ddouble.getDouble());
 387   EXPECT_EQ(5.0, std::move(mdouble).getDouble());
 388
 389   EXPECT_EQ(true, cbool.getBool());
 390   dbool.getBool() = false;
 391   EXPECT_FALSE(dbool.getBool());
 392   EXPECT_EQ(true, std::move(mbool).getBool());
 393 }
 394
 395 TEST(Dynamic, At) {
 396   const dynamic cd = dynamic::object("key1", make_long_string());
 397   dynamic dd = dynamic::object("key1", make_long_string());
 398   dynamic md = dynamic::object("key1", make_long_string());
 399
 400   dynamic ds(make_long_string());
 401   EXPECT_EQ(ds, cd.at("key1"));
 402   EXPECT_EQ(ds, cd.at("key1"));
 403
 404   dd.at("key1").getString() += " hello";
 405   EXPECT_EQ(dynamic(make_long_string() + " hello"), dd.at("key1"));
 406   EXPECT_EQ(dynamic(make_long_string() + " hello"), dd.at("key1"));
 407
 408   EXPECT_EQ(ds, std::move(md).at("key1"));
 409   EXPECT_NE(ds, md.at("key1"));
 410 }
 411
 412 TEST(Dynamic, Brackets) {
 413   const dynamic cd = dynamic::object("key1", make_long_string());
 414   dynamic dd = dynamic::object("key1", make_long_string());
 415   dynamic md = dynamic::object("key1", make_long_string());
 416
 417   dynamic ds(make_long_string());
 418   EXPECT_EQ(ds, cd["key1"]);
 419   EXPECT_EQ(ds, cd["key1"]);
 420
 421   dd["key1"].getString() += " hello";
 422   EXPECT_EQ(dynamic(make_long_string() + " hello"), dd["key1"]);
 423   EXPECT_EQ(dynamic(make_long_string() + " hello"), dd["key1"]);
 424
 425   EXPECT_EQ(ds, std::move(md)["key1"]);
 426   EXPECT_NE(ds, md["key1"]);
 427 }
 428
 429 int main(int argc, char** argv) {
 430   testing::InitGoogleTest(&argc, argv);
 431   gflags::ParseCommandLineFlags(&argc, &argv, true);
 432   return RUN_ALL_TESTS();
 433 }