| #include "../test.h" |
| #include <rxcpp/operators/rx-all.hpp> |
| |
| SCENARIO("is_empty emits false if the source observable is not empty", "[is_empty][operators]") { |
| GIVEN("a source") { |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<bool> on_is_empty; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 10), |
| on.next(220, 20), |
| on.completed(250) |
| }); |
| |
| WHEN("is_empty is invoked") { |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| | rxo::is_empty() |
| | rxo::as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013 |
| } |
| ); |
| |
| THEN("the output only contains true") { |
| auto required = rxu::to_vector({ |
| on_is_empty.next(210, false), |
| on_is_empty.completed(210) |
| }); |
| 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, 210) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| |
| } |
| } |
| } |
| |
| SCENARIO("is_empty emits true if the source observable is empty", "[is_empty][operators]") { |
| GIVEN("a source") { |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<bool> on_is_empty; |
| |
| auto xs = sc.make_hot_observable({ |
| on.completed(250) |
| }); |
| |
| WHEN("is_empty is invoked") { |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .is_empty() |
| .as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013 |
| } |
| ); |
| |
| THEN("the output only contains true") { |
| auto required = rxu::to_vector({ |
| on_is_empty.next(250, true), |
| on_is_empty.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("is_empty never emits if the source observable never emits any items", "[is_empty][operators]") { |
| GIVEN("a source") { |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<bool> on_is_empty; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1) |
| }); |
| |
| WHEN("is_empty is invoked") { |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .is_empty() |
| .as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013 |
| } |
| ); |
| |
| THEN("the output is empty") { |
| auto required = std::vector<rxsc::test::messages<bool>::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("is_empty emits an error if the source observable emit an error", "[is_empty][operators]") { |
| GIVEN("a source") { |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<bool> on_is_empty; |
| |
| std::runtime_error ex("is_empty on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("is_empty is invoked") { |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .is_empty() |
| .as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013 |
| } |
| ); |
| |
| THEN("the output only contains an error") { |
| auto required = rxu::to_vector({ |
| on_is_empty.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); |
| } |
| |
| } |
| } |
| } |