lldb/unittests/Utility/PredicateTest.cpp

//===-- PredicateTest.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 "lldb/Utility/Predicate.h"
#include "gtest/gtest.h"
#include <thread>

using namespace lldb_private;

TEST(Predicate, WaitForValueEqualTo) {
  Predicate<int> P(0);
  EXPECT_TRUE(P.WaitForValueEqualTo(0));
  EXPECT_FALSE(P.WaitForValueEqualTo(1, std::chrono::milliseconds(10)));

  std::thread Setter([&P] {
    std::this_thread::sleep_for(std::chrono::milliseconds(100));
    P.SetValue(1, eBroadcastAlways);
  });
  EXPECT_TRUE(P.WaitForValueEqualTo(1));
  Setter.join();
}

TEST(Predicate, WaitForValueNotEqualTo) {
  Predicate<int> P(0);
  EXPECT_EQ(0, P.WaitForValueNotEqualTo(1));
  EXPECT_EQ(std::nullopt,
            P.WaitForValueNotEqualTo(0, std::chrono::milliseconds(10)));
}