| #include "../test.h" |
| #include "rxcpp/operators/rx-reduce.hpp" |
| |
| SCENARIO("reduce some data with seed", "[reduce][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| int seed = 42; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 0), |
| on.next(220, 1), |
| on.next(230, 2), |
| on.next(240, 3), |
| on.next(250, 4), |
| on.completed(260) |
| }); |
| |
| WHEN("mapped to ints that are one larger"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs |
| .reduce(seed, |
| [](int sum, int x) { |
| return sum + x; |
| }, |
| [](int sum) { |
| return sum * 5; |
| }) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| THEN("the output stops on completion"){ |
| auto required = rxu::to_vector({ |
| on.next(260, (seed + 0 + 1 + 2 + 3 + 4) * 5), |
| on.completed(260) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 260) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("accumulate some data with seed", "[accumulate][reduce][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| |
| int seed = 42; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 0), |
| on.next(220, 1), |
| on.next(230, 2), |
| on.next(240, 3), |
| on.next(250, 4), |
| on.completed(260) |
| }); |
| |
| WHEN("mapped to ints that are one larger"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs |
| .accumulate(seed, |
| [](int sum, int x) { |
| return sum + x; |
| }, |
| [](int sum) { |
| return sum * 5; |
| }) |
| // forget type to workaround lambda deduction bug on msvc 2013 |
| .as_dynamic(); |
| } |
| ); |
| |
| THEN("the output stops on completion"){ |
| auto required = rxu::to_vector({ |
| on.next(260, (seed + 0 + 1 + 2 + 3 + 4) * 5), |
| on.completed(260) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 260) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("average some data", "[reduce][average][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<double> d_on; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 3), |
| on.next(220, 4), |
| on.next(230, 2), |
| on.completed(250) |
| }); |
| |
| WHEN("mapped to ints that are one larger"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.average(); |
| } |
| ); |
| |
| THEN("the output stops on completion"){ |
| auto required = rxu::to_vector({ |
| d_on.next(250, 3.0), |
| d_on.completed(250) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("sum some data", "[reduce][sum][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 3), |
| on.next(220, 4), |
| on.next(230, 2), |
| on.completed(250) |
| }); |
| |
| WHEN("sum is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.sum(); |
| } |
| ); |
| |
| THEN("the output contains the sum of source values"){ |
| auto required = rxu::to_vector({ |
| d_on.next(250, 9), |
| d_on.completed(250) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("max", "[reduce][max][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 3), |
| on.next(220, 4), |
| on.next(230, 2), |
| on.completed(250) |
| }); |
| |
| WHEN("max is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.max(); |
| } |
| ); |
| |
| THEN("the output contains the max of source values"){ |
| auto required = rxu::to_vector({ |
| d_on.next(250, 4), |
| d_on.completed(250) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| // Does not work because calling max() on an empty stream throws an exception |
| // which will crash when exceptions are disabled. |
| // |
| // TODO: the max internal implementation should be rewritten not to throw exceptions. |
| SCENARIO("max, empty", "[reduce][max][operators][!throws]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| std::runtime_error ex("max on_error"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.completed(250) |
| }); |
| |
| WHEN("max is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.max(); |
| } |
| ); |
| |
| THEN("the output contains only error message"){ |
| auto required = rxu::to_vector({ |
| d_on.error(250, ex) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("max, error", "[reduce][max][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| std::runtime_error ex("max on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("max is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.max(); |
| } |
| ); |
| |
| THEN("the output contains only error message"){ |
| auto required = rxu::to_vector({ |
| d_on.error(250, ex) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("min", "[reduce][min][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.next(210, 3), |
| on.next(220, 4), |
| on.next(230, 2), |
| on.completed(250) |
| }); |
| |
| WHEN("min is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.min(); |
| } |
| ); |
| |
| THEN("the output contains the min of source values"){ |
| auto required = rxu::to_vector({ |
| d_on.next(250, 2), |
| d_on.completed(250) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| // Does not work with exceptions disabled, min will throw when stream is empty |
| // and this crashes immediately. |
| // TODO: min implementation should be rewritten not to throw exceptions. |
| SCENARIO("min, empty", "[reduce][min][operators][!throws]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| std::runtime_error ex("min on_error"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.completed(250) |
| }); |
| |
| WHEN("min is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.min(); |
| } |
| ); |
| |
| THEN("the output contains only error message"){ |
| auto required = rxu::to_vector({ |
| d_on.error(250, ex) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |
| |
| SCENARIO("min, error", "[reduce][min][operators]"){ |
| GIVEN("a test hot observable of ints"){ |
| auto sc = rxsc::make_test(); |
| auto w = sc.create_worker(); |
| const rxsc::test::messages<int> on; |
| const rxsc::test::messages<int> d_on; |
| |
| std::runtime_error ex("min on_error from source"); |
| |
| auto xs = sc.make_hot_observable({ |
| on.next(150, 1), |
| on.error(250, ex) |
| }); |
| |
| WHEN("min is calculated"){ |
| |
| auto res = w.start( |
| [&]() { |
| return xs.min(); |
| } |
| ); |
| |
| THEN("the output contains only error message"){ |
| auto required = rxu::to_vector({ |
| d_on.error(250, ex) |
| }); |
| auto actual = res.get_observer().messages(); |
| REQUIRE(required == actual); |
| } |
| |
| THEN("there was one subscription and one unsubscription"){ |
| auto required = rxu::to_vector({ |
| on.subscribe(200, 250) |
| }); |
| auto actual = xs.subscriptions(); |
| REQUIRE(required == actual); |
| } |
| } |
| } |
| } |