294 lines
8.2 KiB
C++
294 lines
8.2 KiB
C++
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#include "../test.h"
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#include <rxcpp/operators/rx-element_at.hpp>
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SCENARIO("element_at - never", "[element_at][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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});
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WHEN("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs | rxo::element_at(3);
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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("element_at - empty", "[element_at][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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std::runtime_error ex("element_at 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.completed(250)
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});
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WHEN("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(0);
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}
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);
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THEN("the output only contains an error"){
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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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SCENARIO("element_at - first", "[element_at][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.completed(250)
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});
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WHEN("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(0);
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}
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);
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THEN("the output contains the first element"){
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auto required = rxu::to_vector({
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on.next(210, 2),
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on.completed(210)
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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, 210)
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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("element_at - throw", "[element_at][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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std::runtime_error ex("element_at 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("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(3);
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}
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);
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THEN("the output contains an error"){
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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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SCENARIO("element_at - non-first", "[element_at][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("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(2);
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}
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);
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THEN("the output contains the element at requested index"){
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auto required = rxu::to_vector({
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on.next(230, 4),
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on.completed(230)
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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, 230)
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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("element_at - last in a sequence", "[element_at][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("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(3);
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}
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);
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THEN("the output contains the element at requested index"){
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auto required = rxu::to_vector({
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on.next(240, 5),
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on.completed(240)
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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, 240)
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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("element_at - invalid index", "[element_at][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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std::runtime_error ex("element_at 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.next(210, 2), // #0
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on.next(220, 3), // #1
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on.next(230, 4), // #2
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on.next(240, 5), // #3
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on.completed(250)
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});
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WHEN("element_at is taken"){
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auto res = w.start(
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[xs]() {
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return xs.element_at(4);
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}
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);
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THEN("the output contains an error"){
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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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