278 lines
8.3 KiB
C++
278 lines
8.3 KiB
C++
#include "../test.h"
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#include <rxcpp/operators/rx-take_last.hpp>
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SCENARIO("take last 0", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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auto xs = sc.make_hot_observable({
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on.next(150, 1),
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on.next(210, 2),
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on.next(220, 3),
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on.next(230, 4),
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on.next(240, 5),
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on.completed(250)
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});
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WHEN("0 last values are taken"){
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auto res = w.start(
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[xs]() {
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return xs
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| rxo::take_last(0)
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// forget type to workaround lambda deduction bug on msvc 2013
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| rxo::as_dynamic();
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}
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);
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THEN("the output only contains the completion event"){
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auto required = rxu::to_vector({
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on.completed(250)
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});
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 250)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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SCENARIO("take last 1", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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auto xs = sc.make_hot_observable({
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on.next(150, 1),
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on.next(210, 2),
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on.next(220, 3),
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on.next(230, 4),
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on.next(240, 5),
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on.completed(250)
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});
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WHEN("1 last value is taken"){
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auto res = w.start(
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[xs]() {
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return xs
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.take_last(1)
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// forget type to workaround lambda deduction bug on msvc 2013
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.as_dynamic();
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}
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);
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THEN("the output only contains items sent while subscribed"){
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auto required = rxu::to_vector({
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on.next(250, 5),
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on.completed(250)
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});
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 250)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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SCENARIO("take last 2", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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auto xs = sc.make_hot_observable({
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on.next(150, 1),
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on.next(210, 2),
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on.next(220, 3),
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on.next(230, 4),
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on.next(240, 5),
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on.completed(250)
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});
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WHEN("2 last values are taken"){
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auto res = w.start(
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[xs]() {
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return xs
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.take_last(2)
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// forget type to workaround lambda deduction bug on msvc 2013
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.as_dynamic();
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}
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);
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THEN("the output only contains items sent while subscribed"){
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auto required = rxu::to_vector({
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on.next(250, 4),
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on.next(250, 5),
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on.completed(250)
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});
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 250)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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SCENARIO("take last 10, complete before all elements are taken", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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auto xs = sc.make_hot_observable({
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on.next(150, 1),
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on.next(210, 2),
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on.next(220, 3),
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on.next(230, 4),
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on.next(240, 5),
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on.completed(250)
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});
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WHEN("10 last values are taken"){
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auto res = w.start(
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[xs]() {
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return xs
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.take_last(10)
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// forget type to workaround lambda deduction bug on msvc 2013
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.as_dynamic();
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}
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);
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THEN("the output only contains items sent while subscribed"){
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auto required = rxu::to_vector({
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on.next(250, 2),
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on.next(250, 3),
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on.next(250, 4),
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on.next(250, 5),
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on.completed(250)
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});
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 250)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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SCENARIO("no items to take_last", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto so = rx::synchronize_in_one_worker(sc);
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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auto xs = sc.make_hot_observable({
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on.next(150, 1)
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});
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WHEN("2 last values are taken"){
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auto res = w.start(
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[so, xs]() {
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return xs
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.take_last(2)
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// forget type to workaround lambda deduction bug on msvc 2013
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.as_dynamic();
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}
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);
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THEN("the output is empty"){
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auto required = std::vector<rxsc::test::messages<int>::recorded_type>();
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 1000)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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SCENARIO("take_last, source observable emits an error", "[take_last][operators]"){
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GIVEN("a source"){
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auto sc = rxsc::make_test();
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auto so = rx::synchronize_in_one_worker(sc);
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auto w = sc.create_worker();
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const rxsc::test::messages<int> on;
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std::runtime_error ex("on_error from source");
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auto xs = sc.make_hot_observable({
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on.next(150, 1),
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on.error(250, ex)
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});
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WHEN("2 last values are taken"){
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auto res = w.start(
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[so, xs]() {
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return xs
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.take_last(2)
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// forget type to workaround lambda deduction bug on msvc 2013
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.as_dynamic();
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}
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);
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THEN("the output contains only an error message"){
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auto required = rxu::to_vector({
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on.error(250, ex)
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});
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auto actual = res.get_observer().messages();
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REQUIRE(required == actual);
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}
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THEN("there was 1 subscription/unsubscription to the source"){
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auto required = rxu::to_vector({
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on.subscribe(200, 250)
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});
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auto actual = xs.subscriptions();
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REQUIRE(required == actual);
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}
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}
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}
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}
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