| #include "../test.h" |
| #include <rxcpp/operators/rx-switch_if_empty.hpp> |
| |
| SCENARIO("default_if_empty should not switch if the source is not empty", "[default_if_empty][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(210, 1), |
| on.completed(250) |
| }); |
| |
| WHEN("started"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| | rxo::default_if_empty(2) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| | rxo::as_dynamic(); |
| } |
| ); |
| |
| THEN("the output only contains an item from the source") { |
| auto required = rxu::to_vector({ |
| on.next(210, 1), |
| 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("default_if_empty should switch if the source is empty", "[default_if_empty][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("started"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .default_if_empty(2) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| THEN("the output only contains an item from the backup source") { |
| auto required = rxu::to_vector({ |
| on.next(250, 2), |
| 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("default_if_empty - never", "[default_if_empty][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("started"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .default_if_empty(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("default_if_empty - source throws", "[default_if_empty][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| std::runtime_error ex("default_if_empty on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("started"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs |
| .default_if_empty(2) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| THEN("the output only contains an error from the source"){ |
| 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); |
| } |
| } |
| } |
| } |