| //===-- 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 |