| #include "../test.h" |
| #include <rxcpp/operators/rx-skip_last.hpp> |
| |
| SCENARIO("skip last 0", "[skip_last][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("0 last values are skipped"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| | rxo::skip_last(0) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| | rxo::as_dynamic(); |
| } |
| ); |
| |
| THEN("the output only contains the completion event"){ |
| auto required = rxu::to_vector({ |
| on.next(210, 2), |
| on.next(220, 3), |
| on.next(230, 4), |
| on.next(240, 5), |
| 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("skip last 1", "[skip_last][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("1 last value is skipped"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .skip_last(1) |
| // 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(220, 2), |
| on.next(230, 3), |
| on.next(240, 4), |
| 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("skip last 2", "[skip_last][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("2 last values are skipped"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .skip_last(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(230, 2), |
| on.next(240, 3), |
| 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("skip last 10, complete before all elements are skipped", "[skip_last][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("10 last values are skipped"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .skip_last(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.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("no items to skip_last", "[skip_last][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto so = rx::synchronize_in_one_worker(sc); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1) |
| }); |
| |
| WHEN("2 last values are skipped"){ |
| |
| auto res = w.start( |
| [so, xs]() { |
| return xs |
| .skip_last(2) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| 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("skip_last, source observable emits an error", "[skip_last][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto so = rx::synchronize_in_one_worker(sc); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| std::runtime_error ex("on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("2 last values are skipped"){ |
| |
| auto res = w.start( |
| [so, xs]() { |
| return xs |
| .skip_last(2) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| THEN("the output contains only an error message"){ |
| 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); |
| } |
| |
| } |
| } |
| } |