cpp-lazy-stream/test/to_container_test.cxx

//
//  to_container_test.cxx
//  stream-test
//
//  Created by Sam Jaffe on 4/5/23.
//

#include "stream/to_container.h"

#include "stream_helpers.h"
#include "stream_matchers.h"

using testing::ElementsAre;
using testing::Pair;
using testing::StaticAssertTypeEq;

TEST(ToContainer, ConvertsToSet) {
  std::vector<int> const input{0, 1, 2, 1, 2};

  auto output = input | ranges::to_set();
  StaticAssertTypeEq<decltype(output), std::set<int>>();
  EXPECT_THAT(output, ElementsAre(0, 1, 2));
}

TEST(ToContainer, ConvertsToVector) {
  std::set<int> const input{0, 1, 2};

  auto output = input | ranges::to_vector();
  StaticAssertTypeEq<decltype(output), std::vector<int>>();
  EXPECT_THAT(output, ElementsAre(0, 1, 2));
}

TEST(ToContainer, CanConvertPairContainerToAssoc) {
  std::vector<std::pair<int, std::string>> const input{{0, "hello"},
                                                       {1, "goodbye"}};

  auto output = input | ranges::to_map();
  StaticAssertTypeEq<decltype(output), std::map<int, std::string>>();
  EXPECT_THAT(output, ElementsAre(Pair(0, "hello"), Pair(1, "goodbye")));
}

TEST(ToContainer, CanConvertAssocToPairContainer) {
  std::map<int, std::string> const input{{0, "hello"}, {1, "goodbye"}};

  auto output = input | ranges::to_vector();
  StaticAssertTypeEq<decltype(output),
                     std::vector<std::pair<int const, std::string>>>();
  EXPECT_THAT(output, ElementsAre(Pair(0, "hello"), Pair(1, "goodbye")));
}