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#include "../test.h"
#include <rxcpp/operators/rx-all.hpp>
SCENARIO("is_empty emits false if the source observable is not empty", "[is_empty][operators]") {
GIVEN("a source") {
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
const rxsc::test::messages<bool> on_is_empty;
auto xs = sc.make_hot_observable({
on.next(150, 1),
on.next(210, 10),
on.next(220, 20),
on.completed(250)
});
WHEN("is_empty is invoked") {
auto res = w.start(
[xs]() {
return xs
| rxo::is_empty()
| rxo::as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013
}
);
THEN("the output only contains true") {
auto required = rxu::to_vector({
on_is_empty.next(210, false),
on_is_empty.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("is_empty emits true if the source observable is empty", "[is_empty][operators]") {
GIVEN("a source") {
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
const rxsc::test::messages<bool> on_is_empty;
auto xs = sc.make_hot_observable({
on.completed(250)
});
WHEN("is_empty is invoked") {
auto res = w.start(
[xs]() {
return xs
.is_empty()
.as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013
}
);
THEN("the output only contains true") {
auto required = rxu::to_vector({
on_is_empty.next(250, true),
on_is_empty.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("is_empty never emits if the source observable never emits any items", "[is_empty][operators]") {
GIVEN("a source") {
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
const rxsc::test::messages<bool> on_is_empty;
auto xs = sc.make_hot_observable({
on.next(150, 1)
});
WHEN("is_empty is invoked") {
auto res = w.start(
[xs]() {
return xs
.is_empty()
.as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013
}
);
THEN("the output is empty") {
auto required = std::vector<rxsc::test::messages<bool>::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("is_empty emits an error if the source observable emit an error", "[is_empty][operators]") {
GIVEN("a source") {
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
const rxsc::test::messages<bool> on_is_empty;
std::runtime_error ex("is_empty on_error from source");
auto xs = sc.make_hot_observable({
on.next(150, 1),
on.error(250, ex)
});
WHEN("is_empty is invoked") {
auto res = w.start(
[xs]() {
return xs
.is_empty()
.as_dynamic(); // forget type to workaround lambda deduction bug on msvc 2013
}
);
THEN("the output only contains an error") {
auto required = rxu::to_vector({
on_is_empty.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);
}
}
}
}
|
