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|
#include "../test.h"
#include <rxcpp/operators/rx-filter.hpp>
namespace {
bool IsPrime(int x)
{
if (x < 2) return false;
for (int i = 2; i <= x/2; ++i)
{
if (x % i == 0)
return false;
}
return true;
}
}
SCENARIO("filter stops on completion", "[filter][operators]"){
GIVEN("a test hot observable of ints"){
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
long invoked = 0;
auto xs = sc.make_hot_observable({
on.next(110, 1),
on.next(180, 2),
on.next(230, 3),
on.next(270, 4),
on.next(340, 5),
on.next(380, 6),
on.next(390, 7),
on.next(450, 8),
on.next(470, 9),
on.next(560, 10),
on.next(580, 11),
on.completed(600),
on.next(610, 12),
on.error(620, std::runtime_error("error in unsubscribed stream")),
on.completed(630)
});
WHEN("filtered to ints that are primes"){
auto res = w.start(
[&xs, &invoked]() {
return xs
| rxo::filter([&invoked](int x) {
invoked++;
return IsPrime(x);
})
// forget type to workaround lambda deduction bug on msvc 2013
| rxo::as_dynamic();
}
);
THEN("the output only contains primes"){
auto required = rxu::to_vector({
on.next(230, 3),
on.next(340, 5),
on.next(390, 7),
on.next(580, 11),
on.completed(600)
});
auto actual = res.get_observer().messages();
REQUIRE(required == actual);
}
THEN("there was one subscription and one unsubscription"){
auto required = rxu::to_vector({
on.subscribe(200, 600)
});
auto actual = xs.subscriptions();
REQUIRE(required == actual);
}
THEN("filter was called until completed"){
REQUIRE(9 == invoked);
}
}
}
}
SCENARIO("filter stops on disposal", "[where][filter][operators]"){
GIVEN("a test hot observable of ints"){
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
long invoked = 0;
auto xs = sc.make_hot_observable({
on.next(110, 1),
on.next(180, 2),
on.next(230, 3),
on.next(270, 4),
on.next(340, 5),
on.next(380, 6),
on.next(390, 7),
on.next(450, 8),
on.next(470, 9),
on.next(560, 10),
on.next(580, 11),
on.completed(600)
});
WHEN("filtered to ints that are primes"){
auto res = w.start(
[&xs, &invoked]() {
return xs
.filter([&invoked](int x) {
invoked++;
return IsPrime(x);
})
// forget type to workaround lambda deduction bug on msvc 2013
.as_dynamic();
},
400
);
THEN("the output only contains primes that arrived before disposal"){
auto required = rxu::to_vector({
on.next(230, 3),
on.next(340, 5),
on.next(390, 7)
});
auto actual = res.get_observer().messages();
REQUIRE(required == actual);
}
THEN("there was one subscription and one unsubscription"){
auto required = rxu::to_vector({
on.subscribe(200, 400)
});
auto actual = xs.subscriptions();
REQUIRE(required == actual);
}
THEN("where was called until disposed"){
REQUIRE(5 == invoked);
}
}
}
}
SCENARIO("filter stops on error", "[where][filter][operators]"){
GIVEN("a test hot observable of ints"){
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
long invoked = 0;
std::runtime_error ex("filter on_error from source");
auto xs = sc.make_hot_observable({
on.next(110, 1),
on.next(180, 2),
on.next(230, 3),
on.next(270, 4),
on.next(340, 5),
on.next(380, 6),
on.next(390, 7),
on.next(450, 8),
on.next(470, 9),
on.next(560, 10),
on.next(580, 11),
on.error(600, ex),
on.next(610, 12),
on.error(620, std::runtime_error("error in unsubscribed stream")),
on.completed(630)
});
WHEN("filtered to ints that are primes"){
auto res = w.start(
[xs, &invoked]() {
return xs
.filter([&invoked](int x) {
invoked++;
return IsPrime(x);
})
// forget type to workaround lambda deduction bug on msvc 2013
.as_dynamic();
}
);
THEN("the output only contains primes"){
auto required = rxu::to_vector({
on.next(230, 3),
on.next(340, 5),
on.next(390, 7),
on.next(580, 11),
on.error(600, ex),
});
auto actual = res.get_observer().messages();
REQUIRE(required == actual);
}
THEN("there was one subscription and one unsubscription"){
auto required = rxu::to_vector({
on.subscribe(200, 600)
});
auto actual = xs.subscriptions();
REQUIRE(required == actual);
}
THEN("where was called until error"){
REQUIRE(9 == invoked);
}
}
}
}
// filter cannot possibly catch an exception when exceptions are disabled,
// so this test is meaningless when exceptions are disabled.
SCENARIO("filter stops on throw from predicate", "[where][filter][operators][!throws]"){
GIVEN("a test hot observable of ints"){
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
long invoked = 0;
std::runtime_error ex("filter predicate error");
auto xs = sc.make_hot_observable({
on.next(110, 1),
on.next(180, 2),
on.next(230, 3),
on.next(270, 4),
on.next(340, 5),
on.next(380, 6),
on.next(390, 7),
on.next(450, 8),
on.next(470, 9),
on.next(560, 10),
on.next(580, 11),
on.completed(600),
on.next(610, 12),
on.error(620, std::runtime_error("error in unsubscribed stream")),
on.completed(630)
});
WHEN("filtered to ints that are primes"){
auto res = w.start(
[ex, xs, &invoked]() {
return xs
.filter([ex, &invoked](int x) {
invoked++;
if (x > 5) {
rxu::throw_exception(ex);
}
return IsPrime(x);
})
// forget type to workaround lambda deduction bug on msvc 2013
.as_dynamic();
}
);
THEN("the output only contains primes"){
auto required = rxu::to_vector({
on.next(230, 3),
on.next(340, 5),
on.error(380, ex)
});
auto actual = res.get_observer().messages();
REQUIRE(required == actual);
}
THEN("there was one subscription and one unsubscription"){
auto required = rxu::to_vector({
on.subscribe(200, 380)
});
auto actual = xs.subscriptions();
REQUIRE(required == actual);
}
THEN("where was called until error"){
REQUIRE(4 == invoked);
}
}
}
}
SCENARIO("filter stops on dispose from predicate", "[where][filter][operators]"){
GIVEN("a test hot observable of ints"){
auto sc = rxsc::make_test();
auto w = sc.create_worker();
const rxsc::test::messages<int> on;
long invoked = 0;
auto xs = sc.make_hot_observable({
on.next(110, 1),
on.next(180, 2),
on.next(230, 3),
on.next(270, 4),
on.next(340, 5),
on.next(380, 6),
on.next(390, 7),
on.next(450, 8),
on.next(470, 9),
on.next(560, 10),
on.next(580, 11),
on.completed(600),
on.next(610, 12),
on.error(620, std::exception()),
on.completed(630)
});
auto res = w.make_subscriber<int>();
rx::observable<int, rx::dynamic_observable<int>> ys;
WHEN("filtered to ints that are primes"){
w.schedule_absolute(rxsc::test::created_time,
[&invoked, &res, &ys, &xs](const rxsc::schedulable&) {
ys = xs
.filter([&invoked, &res](int x) {
invoked++;
if (x == 8)
res.unsubscribe();
return IsPrime(x);
});
});
w.schedule_absolute(rxsc::test::subscribed_time, [&ys, &res](const rxsc::schedulable&) {
ys.subscribe(res);
});
w.schedule_absolute(rxsc::test::unsubscribed_time, [&res](const rxsc::schedulable&) {
res.unsubscribe();
});
w.start();
THEN("the output only contains primes"){
auto required = rxu::to_vector({
on.next(230, 3),
on.next(340, 5),
on.next(390, 7)
});
auto actual = res.get_observer().messages();
REQUIRE(required == actual);
}
THEN("there was one subscription and one unsubscription"){
auto required = rxu::to_vector({
on.subscribe(200, 450)
});
auto actual = xs.subscriptions();
REQUIRE(required == actual);
}
THEN("where was called until disposed"){
REQUIRE(6 == invoked);
}
}
}
}
|
