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#include "support/Cancellation.h"
#include "support/Context.h"
#include "support/Threading.h"
#include "llvm/Support/Error.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include <atomic>
#include <memory>
#include <thread>
namespace clang {
namespace clangd {
namespace {
TEST(CancellationTest, CancellationTest) {
auto Task = cancelableTask();
WithContext ContextWithCancellation(std::move(Task.first));
EXPECT_FALSE(isCancelled());
Task.second();
EXPECT_TRUE(isCancelled());
}
TEST(CancellationTest, CancelerDiesContextLives) {
llvm::Optional<WithContext> ContextWithCancellation;
{
auto Task = cancelableTask();
ContextWithCancellation.emplace(std::move(Task.first));
EXPECT_FALSE(isCancelled());
Task.second();
EXPECT_TRUE(isCancelled());
}
EXPECT_TRUE(isCancelled());
}
TEST(CancellationTest, TaskContextDiesHandleLives) {
auto Task = cancelableTask();
{
WithContext ContextWithCancellation(std::move(Task.first));
EXPECT_FALSE(isCancelled());
Task.second();
EXPECT_TRUE(isCancelled());
}
// Still should be able to cancel without any problems.
Task.second();
}
struct NestedTasks {
enum { OuterReason = 1, InnerReason = 2 };
std::pair<Context, Canceler> Outer, Inner;
NestedTasks() {
Outer = cancelableTask(OuterReason);
{
WithContext WithOuter(Outer.first.clone());
Inner = cancelableTask(InnerReason);
}
}
};
TEST(CancellationTest, Nested) {
// Cancelling inner task works but leaves outer task unaffected.
NestedTasks CancelInner;
CancelInner.Inner.second();
EXPECT_EQ(NestedTasks::InnerReason, isCancelled(CancelInner.Inner.first));
EXPECT_FALSE(isCancelled(CancelInner.Outer.first));
// Cancellation of outer task is inherited by inner task.
NestedTasks CancelOuter;
CancelOuter.Outer.second();
EXPECT_EQ(NestedTasks::OuterReason, isCancelled(CancelOuter.Inner.first));
EXPECT_EQ(NestedTasks::OuterReason, isCancelled(CancelOuter.Outer.first));
}
TEST(CancellationTest, AsynCancellationTest) {
std::atomic<bool> HasCancelled(false);
Notification Cancelled;
auto TaskToBeCancelled = [&](Context Ctx) {
WithContext ContextGuard(std::move(Ctx));
Cancelled.wait();
HasCancelled = isCancelled();
};
auto Task = cancelableTask();
std::thread AsyncTask(TaskToBeCancelled, std::move(Task.first));
Task.second();
Cancelled.notify();
AsyncTask.join();
EXPECT_TRUE(HasCancelled);
}
} // namespace
} // namespace clangd
} // namespace clang
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