test/operators/ignore_elements.cpp

#include "../test.h"
#include <rxcpp/operators/rx-ignore_elements.hpp>

SCENARIO("ignore_elements - never", "[ignore_elements][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(150, 1)
        });

        WHEN("ignore_elements is applied"){

            auto res = w.start(
                [xs]() {
                    return xs | rxo::ignore_elements();
                }
            );

            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, 1000)
                });
                auto actual = xs.subscriptions();
                REQUIRE(required == actual);
            }
        }
    }
}

SCENARIO("ignore_elements - empty", "[ignore_elements][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(150, 1),
            on.completed(250)
        });

        WHEN("ignore_elements is applied"){

            auto res = w.start(
                [xs]() {
                    return xs.ignore_elements();
                }
            );

            THEN("the output contains the completion message"){
                auto required = rxu::to_vector({
                    on.completed(250)
                });
                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("ignore_elements - throw", "[ignore_elements][operators]"){
    GIVEN("a source"){
        auto sc = rxsc::make_test();
        auto w = sc.create_worker();
        const rxsc::test::messages<int> on;

        std::runtime_error ex("ignore_elements on_error from source");

        auto xs = sc.make_hot_observable({
            on.next(150, 1),
            on.error(250, ex)
        });

        WHEN("ignore_elements is applied"){

            auto res = w.start(
                [xs]() {
                    return xs.ignore_elements();
                }
            );

            THEN("the output contains an error"){
                auto required = rxu::to_vector({
                    on.error(250, 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, 250)
                });
                auto actual = xs.subscriptions();
                REQUIRE(required == actual);
            }

        }
    }
}

SCENARIO("ignore_elements - items", "[ignore_elements][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(150, 1),
            on.next(210, 2),
            on.next(220, 3),
            on.next(230, 4),
            on.next(240, 5),
            on.completed(250)
        });

        WHEN("ignore_elements is applied"){

            auto res = w.start(
                [xs]() {
                    return xs.ignore_elements();
                }
            );

            THEN("the output contains the completion message"){
                auto required = rxu::to_vector({
                    on.completed(250)
                });
                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);
            }

        }
    }
}