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//===-- FunctionTests.cpp -------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "support/Function.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
namespace clang {
namespace clangd {
namespace {
TEST(EventTest, Subscriptions) {
Event<int> E;
int N = 0;
{
Event<int>::Subscription SubA;
// No subscriptions are active.
E.broadcast(42);
EXPECT_EQ(0, N);
Event<int>::Subscription SubB = E.observe([&](int) { ++N; });
// Now one is active.
E.broadcast(42);
EXPECT_EQ(1, N);
SubA = E.observe([&](int) { ++N; });
// Both are active.
EXPECT_EQ(1, N);
E.broadcast(42);
EXPECT_EQ(3, N);
SubA = std::move(SubB);
// One is active.
EXPECT_EQ(3, N);
E.broadcast(42);
EXPECT_EQ(4, N);
}
// None are active.
EXPECT_EQ(4, N);
E.broadcast(42);
EXPECT_EQ(4, N);
}
} // namespace
} // namespace clangd
} // namespace clang
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