text: #include "../test.h"
  #include "rxcpp/operators/rx-skip.hpp"
  
  SCENARIO("skip, complete after", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.completed(690)
          });
  
          WHEN("more values than generated are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(20)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains only complete message"){
                  auto required = rxu::to_vector({
                      on.completed(690)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, complete same", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.completed(690)
          });
  
          WHEN("exact number of values is skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          | rxo::skip(17)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          | rxo::as_dynamic();
                  }
              );
  
              THEN("the output only contains only complete message"){
                  auto required = rxu::to_vector({
                      on.completed(690)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, complete before", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.completed(690)
          });
  
          WHEN("part of values is skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(10)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains items sent while subscribed"){
                  auto required = rxu::to_vector({
                      on.next(460, 72),
                      on.next(510, 76),
                      on.next(560, 32),
                      on.next(570, -100),
                      on.next(580, -3),
                      on.next(590, 5),
                      on.next(630, 10),
                      on.completed(690)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, complete zero", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.completed(690)
          });
  
          WHEN("no values are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(0)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains items sent while subscribed"){
                  auto required = rxu::to_vector({
                      on.next(210, 9),
                      on.next(230, 13),
                      on.next(270, 7),
                      on.next(280, 1),
                      on.next(300, -1),
                      on.next(310, 3),
                      on.next(340, 8),
                      on.next(370, 11),
                      on.next(410, 15),
                      on.next(415, 16),
                      on.next(460, 72),
                      on.next(510, 76),
                      on.next(560, 32),
                      on.next(570, -100),
                      on.next(580, -3),
                      on.next(590, 5),
                      on.next(630, 10),
                      on.completed(690)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, error after", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          std::runtime_error ex("skip on_error from source");
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.error(690, ex)
          });
  
          WHEN("more values than generated are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(20)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains only error message"){
                  auto required = rxu::to_vector({
                      on.error(690, ex)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, error same", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          std::runtime_error ex("skip on_error from source");
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.error(690, ex)
          });
  
          WHEN("exact number of values is skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(17)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains only error message"){
                  auto required = rxu::to_vector({
                      on.error(690, ex)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, error before", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          std::runtime_error ex("skip on_error from source");
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10),
              on.error(690, ex)
          });
  
          WHEN("part of values is skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(3)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains items sent while subscribed"){
                  auto required = rxu::to_vector({
                      on.next(280, 1),
                      on.next(300, -1),
                      on.next(310, 3),
                      on.next(340, 8),
                      on.next(370, 11),
                      on.next(410, 15),
                      on.next(415, 16),
                      on.next(460, 72),
                      on.next(510, 76),
                      on.next(560, 32),
                      on.next(570, -100),
                      on.next(580, -3),
                      on.next(590, 5),
                      on.next(630, 10),
                      on.error(690, ex)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 690)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, dispose before", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10)
          });
  
          WHEN("all generated values are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(3)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  },
                  250
              );
  
              THEN("the output is empty"){
                  auto required = std::vector<rxsc::test::messages<int>::recorded_type>();
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 250)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, dispose after", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.next(410, 15),
              on.next(415, 16),
              on.next(460, 72),
              on.next(510, 76),
              on.next(560, 32),
              on.next(570, -100),
              on.next(580, -3),
              on.next(590, 5),
              on.next(630, 10)
          });
  
          WHEN("some generated values are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(3)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  },
                  400
              );
  
              THEN("the output contains items sent while subscribed"){
                  auto required = rxu::to_vector({
                      on.next(280, 1),
                      on.next(300, -1),
                      on.next(310, 3),
                      on.next(340, 8),
                      on.next(370, 11)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 400)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip, consecutive", "[skip][operators]"){
      GIVEN("a source"){
          auto sc = rxsc::make_test();
          auto w = sc.create_worker();
          const rxsc::test::messages<int> on;
  
          auto xs = sc.make_hot_observable({
              on.next(70, 6),
              on.next(150, 4),
              on.next(210, 9),
              on.next(230, 13),
              on.next(270, 7),
              on.next(280, 1),
              on.next(300, -1),
              on.next(310, 3),
              on.next(340, 8),
              on.next(370, 11),
              on.completed(400)
          });
  
          WHEN("3+2 values are skipped"){
  
              auto res = w.start(
                  [xs]() {
                      return xs
                          .skip(3)
                          .skip(2)
                          // forget type to workaround lambda deduction bug on msvc 2013
                          .as_dynamic();
                  }
              );
  
              THEN("the output only contains items sent while subscribed"){
                  auto required = rxu::to_vector({
                      on.next(310, 3),
                      on.next(340, 8),
                      on.next(370, 11),
                      on.completed(400)
                  });
                  auto actual = res.get_observer().messages();
                  REQUIRE(required == actual);
              }
  
              THEN("there was 1 subscription/unsubscription to the source"){
                  auto required = rxu::to_vector({
                      on.subscribe(200, 400)
                  });
                  auto actual = xs.subscriptions();
                  REQUIRE(required == actual);
              }
          }
      }
  }
  
  SCENARIO("skip doesn't provide copies", "[skip][operators][copies]"){
      GIVEN("observable and subscriber")
      {
          auto          empty_on_next = [](copy_verifier) {};
          auto          sub           = rx::make_observer<copy_verifier>(empty_on_next);
          copy_verifier verifier{};
          auto          obs = verifier.get_observable().skip(0);
          WHEN("subscribe")
          {
              obs.subscribe(sub);
              THEN("no extra copies")
              {
                  // 1 copy to lambda
                  REQUIRE(verifier.get_copy_count() == 1);
                  REQUIRE(verifier.get_move_count() == 0);
              }
          }
      }
  }
  
  
  SCENARIO("skip doesn't provide copies for move", "[skip][operators][copies]"){
      GIVEN("observable and subscriber")
      {
          auto          empty_on_next = [](copy_verifier) {};
          auto          sub           = rx::make_observer<copy_verifier>(empty_on_next);
          copy_verifier verifier{};
          auto          obs = verifier.get_observable_for_move().skip(0);
          WHEN("subscribe")
          {
              obs.subscribe(sub);
              THEN("no extra copies")
              {
                  REQUIRE(verifier.get_copy_count() == 0);
                  // 1 move to lambda
                  REQUIRE(verifier.get_move_count() == 1);
              }
          }
      }
  }
  