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https://github.com/RGBCube/serenity
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9f4feb7315
Returning a reference resulted in Mail's use of Promise causing a crash. Also, awaiting an already-awaited promise is an odd thing to do anyway, so let's just make it release the resolved/rejected value instead of returning a reference to it. Co-Authored-By: Valtteri Koskivuori <vkoskiv@gmail.com>
59 lines
1.4 KiB
C++
59 lines
1.4 KiB
C++
/*
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* Copyright (c) 2023, Ali Mohammad Pur <mpfard@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibCore/EventLoop.h>
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#include <LibCore/Promise.h>
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#include <LibTest/TestSuite.h>
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TEST_CASE(promise_await_async_event)
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{
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Core::EventLoop loop;
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auto promise = MUST(Core::Promise<int>::try_create());
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loop.deferred_invoke([=] {
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promise->resolve(42);
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});
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auto result = promise->await();
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EXPECT(!result.is_error());
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EXPECT_EQ(result.value(), 42);
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}
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TEST_CASE(promise_await_async_event_rejection)
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{
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Core::EventLoop loop;
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auto promise = MUST(Core::Promise<int>::try_create());
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loop.deferred_invoke([=] {
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promise->reject(AK::Error::from_string_literal("lol no"));
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});
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auto result = promise->await();
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EXPECT(result.is_error());
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EXPECT_EQ(result.error().string_literal(), "lol no"sv);
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}
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TEST_CASE(promise_chain_handlers)
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{
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Core::EventLoop loop;
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bool resolved = false;
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bool rejected = false;
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NonnullRefPtr<Core::Promise<int>> promise = MUST(Core::Promise<int>::try_create())
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->when_resolved([&](int&) -> ErrorOr<void> { resolved = true; return {}; })
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.when_rejected([&](AK::Error const&) { rejected = true; });
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loop.deferred_invoke([=] {
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promise->resolve(42);
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});
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(void)promise->await();
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EXPECT(resolved);
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EXPECT(!rejected);
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}
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