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#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);
}
}
}
}
|
