add ignore_elements operator

1 files changed, 160 insertions, 0 deletions

diff --git a/Rx/v2/test/operators/ignore_elements.cpp b/Rx/v2/test/operators/ignore_elements.cpp
new file mode 100644
index 0000000..7e495e9
--- /dev/null
+++ b/Rx/v2/test/operators/ignore_elements.cpp
@@ -0,0 +1,160 @@
+#include "../test.h"
+
+
+SCENARIO("ignore_elements - never", "[ignore_elements][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("ignore_elements is applied"){
+
+            auto res = w.start(
+                [xs]() {
+                    return xs.ignore_elements();
+                }
+            );
+
+            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("ignore_elements - empty", "[ignore_elements][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("ignore_elements is applied"){
+
+            auto res = w.start(
+                [xs]() {
+                    return xs.ignore_elements();
+                }
+            );
+
+            THEN("the output contains the completion message"){
+                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("ignore_elements - throw", "[ignore_elements][operators]"){
+    GIVEN("a source"){
+        auto sc = rxsc::make_test();
+        auto w = sc.create_worker();
+        const rxsc::test::messages<int> on;
+
+        std::runtime_error ex("ignore_elements on_error from source");
+
+        auto xs = sc.make_hot_observable({
+            on.next(150, 1),
+            on.error(250, ex)
+        });
+
+        WHEN("ignore_elements is applied"){
+
+            auto res = w.start(
+                [xs]() {
+                    return xs.ignore_elements();
+                }
+            );
+
+            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("ignore_elements - items", "[ignore_elements][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("ignore_elements is applied"){
+
+            auto res = w.start(
+                [xs]() {
+                    return xs.ignore_elements();
+                }
+            );
+
+            THEN("the output contains the completion message"){
+                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);
+            }
+
+        }
+    }
+}