| #include "../test.h" |
| #include <rxcpp/operators/rx-element_at.hpp> |
| |
| SCENARIO("element_at - never", "[element_at][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("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs | rxo::element_at(3); |
| } |
| ); |
| |
| 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("element_at - empty", "[element_at][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| std::runtime_error ex("element_at on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.completed(250) |
| }); |
| |
| WHEN("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(0); |
| } |
| ); |
| |
| THEN("the output only 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("element_at - first", "[element_at][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.completed(250) |
| }); |
| |
| WHEN("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(0); |
| } |
| ); |
| |
| THEN("the output contains the first element"){ |
| auto required = rxu::to_vector({ |
| on.next(210, 2), |
| on.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("element_at - throw", "[element_at][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| std::runtime_error ex("element_at on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(3); |
| } |
| ); |
| |
| 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("element_at - non-first", "[element_at][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("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(2); |
| } |
| ); |
| |
| THEN("the output contains the element at requested index"){ |
| auto required = rxu::to_vector({ |
| on.next(230, 4), |
| on.completed(230) |
| }); |
| 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, 230) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| |
| } |
| } |
| } |
| |
| SCENARIO("element_at - last in a sequence", "[element_at][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("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(3); |
| } |
| ); |
| |
| THEN("the output contains the element at requested index"){ |
| auto required = rxu::to_vector({ |
| on.next(240, 5), |
| on.completed(240) |
| }); |
| 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, 240) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| |
| } |
| } |
| } |
| |
| SCENARIO("element_at - invalid index", "[element_at][operators]"){ |
| GIVEN("a source"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| std::runtime_error ex("element_at on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 2), // #0 |
| on.next(220, 3), // #1 |
| on.next(230, 4), // #2 |
| on.next(240, 5), // #3 |
| on.completed(250) |
| }); |
| |
| WHEN("element_at is taken"){ |
| |
| auto res = w.start( |
| [xs]() { |
| return xs.element_at(4); |
| } |
| ); |
| |
| 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); |
| } |
| |
| } |
| } |
| } |