TimerTests.cpp

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/*
 * Copyright 2024 Håvard Krogstie <krogstie.havard@gmail.com>
 * See COPYING for terms of redistribution.
 */
 
#include <gtest/gtest.h>
 
#include <jlm/util/time.hpp>
 
#include <chrono>
#include <thread>
 
using namespace jlm::util;
 
static void
sleepUs(int us)
{
  std::this_thread::sleep_for(std::chrono::duration<int, std::micro>(us));
}
 
TEST(TimerTests, TestStartStop)
{
  Timer t;
  EXPECT_EQ(t.ns(), 0u);
  EXPECT_FALSE(t.isRunning());
 
  t.start();
  EXPECT_TRUE(t.isRunning());
  sleepUs(10);
  t.stop();
  EXPECT_FALSE(t.isRunning());
  auto ns = t.ns();
  EXPECT_GE(ns, 10000u);
 
  // Add more time
  t.start();
  sleepUs(1);
  t.stop();
  EXPECT_GE(t.ns(), ns + 1000);
}
 
TEST(TimerTests, TestReset)
{
  Timer t;
  EXPECT_EQ(t.ns(), 0u);
  EXPECT_FALSE(t.isRunning());
 
  t.start();
  sleepUs(1);
  t.stop();
 
  EXPECT_NE(t.ns(), 0u);
  t.reset();
  EXPECT_EQ(t.ns(), 0u);
  EXPECT_FALSE(t.isRunning());
 
  // Resetting while running
  t.start();
  t.reset();
  EXPECT_EQ(t.ns(), 0u);
  EXPECT_FALSE(t.isRunning());
}