1 files changed, 234 insertions, 0 deletions
diff --git a/src/test/common/test_time.cc b/src/test/common/test_time.cc
new file mode 100644
index 000000000..3054aa50e
--- /dev/null
+++ b/src/test/common/test_time.cc
@@ -0,0 +1,234 @@
+
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation.	See file COPYING.
+ *
+ */
+
+#include <ctime>
+
+#include "common/ceph_time.h"
+#include "include/rados.h"
+#include "gtest/gtest.h"
+#include "include/stringify.h"
+
+
+using ceph::real_clock;
+using ceph::real_time;
+
+using ceph::real_clock;
+using ceph::real_time;
+
+using ceph::coarse_real_clock;
+using ceph::coarse_mono_clock;
+
+using ceph::timespan;
+using ceph::signedspan;
+
+using std::chrono::seconds;
+using std::chrono::microseconds;
+using std::chrono::nanoseconds;
+
+static_assert(!real_clock::is_steady, "ceph::real_clock must not be steady.");
+static_assert(!coarse_real_clock::is_steady,
+	      "ceph::coarse_real_clock must not be steady.");
+
+static_assert(mono_clock::is_steady, "ceph::mono_clock must be steady.");
+static_assert(coarse_mono_clock::is_steady,
+	      "ceph::coarse_mono_clock must be steady.");
+
+// Before this file was written.
+static constexpr uint32_t bs = 1440701569;
+static constexpr uint32_t bns = 123456789;
+static constexpr uint32_t bus = 123456;
+static constexpr time_t btt = bs;
+static constexpr struct timespec bts = { bs, bns };
+static struct ceph_timespec bcts = { init_le32(bs), init_le32(bns) };
+static constexpr struct timeval btv = { bs, bus };
+static constexpr double bd = bs + ((double)bns / 1000000000.);
+
+template<typename Clock>
+static void system_clock_sanity() {
+  static const typename Clock::time_point brt(seconds(bs) + nanoseconds(bns));
+  const typename Clock::time_point now(Clock::now());
+
+  ASSERT_GT(now, brt);
+
+  ASSERT_GT(Clock::to_time_t(now), btt);
+
+  ASSERT_GT(Clock::to_timespec(now).tv_sec, bts.tv_sec);
+  ASSERT_LT(Clock::to_timespec(now).tv_nsec, 1000000000L);
+
+  ASSERT_GT(Clock::to_ceph_timespec(now).tv_sec, bcts.tv_sec);
+  ASSERT_LT(Clock::to_ceph_timespec(now).tv_nsec, 1000000000UL);
+
+  ASSERT_GT(Clock::to_timeval(now).tv_sec, btv.tv_sec);
+  ASSERT_LT(Clock::to_timeval(now).tv_usec, 1000000L);
+}
+
+template<typename Clock>
+static void system_clock_conversions() {
+  static typename Clock::time_point brt(seconds(bs) +
+						  nanoseconds(bns));
+
+  ASSERT_EQ(Clock::to_time_t(brt), btt);
+  ASSERT_EQ(Clock::from_time_t(btt) + nanoseconds(bns), brt);
+
+  {
+    const struct timespec tts = Clock::to_timespec(brt);
+    ASSERT_EQ(tts.tv_sec, bts.tv_sec);
+    ASSERT_EQ(tts.tv_nsec, bts.tv_nsec);
+  }
+  ASSERT_EQ(Clock::from_timespec(bts), brt);
+  {
+    struct timespec tts;
+    Clock::to_timespec(brt, tts);
+    ASSERT_EQ(tts.tv_sec, bts.tv_sec);
+    ASSERT_EQ(tts.tv_nsec, bts.tv_nsec);
+  }
+
+  {
+    const struct ceph_timespec tcts = Clock::to_ceph_timespec(brt);
+    ASSERT_EQ(tcts.tv_sec, bcts.tv_sec);
+    ASSERT_EQ(tcts.tv_nsec, bcts.tv_nsec);
+  }
+  ASSERT_EQ(Clock::from_ceph_timespec(bcts), brt);
+  {
+    struct ceph_timespec tcts;
+    Clock::to_ceph_timespec(brt, tcts);
+    ASSERT_EQ(tcts.tv_sec, bcts.tv_sec);
+    ASSERT_EQ(tcts.tv_nsec, bcts.tv_nsec);
+  }
+
+  {
+    const struct timeval ttv = Clock::to_timeval(brt);
+    ASSERT_EQ(ttv.tv_sec, btv.tv_sec);
+    ASSERT_EQ(ttv.tv_usec, btv.tv_usec);
+  }
+  ASSERT_EQ(Clock::from_timeval(btv), brt - nanoseconds(bns - bus * 1000));
+  {
+    struct timeval ttv;
+    Clock::to_timeval(brt, ttv);
+    ASSERT_EQ(ttv.tv_sec, btv.tv_sec);
+    ASSERT_EQ(ttv.tv_usec, btv.tv_usec);
+  }
+
+  ASSERT_EQ(Clock::to_double(brt), bd);
+  // Fudge factor
+  ASSERT_LT(std::abs((Clock::from_double(bd) - brt).count()), 30);
+}
+
+TEST(RealClock, Sanity) {
+  system_clock_sanity<real_clock>();
+}
+
+
+TEST(RealClock, Conversions) {
+  system_clock_conversions<real_clock>();
+}
+
+TEST(CoarseRealClock, Sanity) {
+  system_clock_sanity<coarse_real_clock>();
+}
+
+
+TEST(CoarseRealClock, Conversions) {
+  system_clock_conversions<coarse_real_clock>();
+}
+
+TEST(TimePoints, SignedSubtraciton) {
+  ceph::real_time rta(std::chrono::seconds(3));
+  ceph::real_time rtb(std::chrono::seconds(5));
+
+  ceph::coarse_real_time crta(std::chrono::seconds(3));
+  ceph::coarse_real_time crtb(std::chrono::seconds(5));
+
+  ceph::mono_time mta(std::chrono::seconds(3));
+  ceph::mono_time mtb(std::chrono::seconds(5));
+
+  ceph::coarse_mono_time cmta(std::chrono::seconds(3));
+  ceph::coarse_mono_time cmtb(std::chrono::seconds(5));
+
+  ASSERT_LT(rta - rtb, ceph::signedspan::zero());
+  ASSERT_LT((rta - rtb).count(), 0);
+  ASSERT_GT(rtb - rta, ceph::signedspan::zero());
+  ASSERT_GT((rtb - rta).count(), 0);
+
+  ASSERT_LT(crta - crtb, ceph::signedspan::zero());
+  ASSERT_LT((crta - crtb).count(), 0);
+  ASSERT_GT(crtb - crta, ceph::signedspan::zero());
+  ASSERT_GT((crtb - crta).count(), 0);
+
+  ASSERT_LT(mta - mtb, ceph::signedspan::zero());
+  ASSERT_LT((mta - mtb).count(), 0);
+  ASSERT_GT(mtb - mta, ceph::signedspan::zero());
+  ASSERT_GT((mtb - mta).count(), 0);
+
+  ASSERT_LT(cmta - cmtb, ceph::signedspan::zero());
+  ASSERT_LT((cmta - cmtb).count(), 0);
+  ASSERT_GT(cmtb - cmta, ceph::signedspan::zero());
+  ASSERT_GT((cmtb - cmta).count(), 0);
+}
+
+TEST(TimePoints, stringify) {
+  ceph::real_clock::time_point tp(seconds(1556122013) + nanoseconds(39923122));
+  string s = stringify(tp);
+  ASSERT_EQ(s.size(), strlen("2019-04-24T11:06:53.039923-0500"));
+  ASSERT_TRUE(s[26] == '-' || s[26] == '+');
+  ASSERT_EQ(s.substr(0, 9), "2019-04-2");
+
+  ceph::coarse_real_clock::time_point ctp(seconds(1556122013) +
+					  nanoseconds(399000000));
+  s = stringify(ctp);
+  ASSERT_EQ(s.size(), strlen("2019-04-24T11:06:53.399000-0500"));
+  ASSERT_TRUE(s[26] == '-' || s[26] == '+');
+  ASSERT_EQ(s.substr(0, 9), "2019-04-2");
+}
+
+namespace {
+  template<typename Rep, typename Period>
+  std::string to_string(const chrono::duration<Rep, Period>& t)
+  {
+    std::ostringstream ss;
+    ss << t;
+    return ss.str();
+  }
+
+  void float_format_eq(string_view lhs,
+                       string_view rhs,
+                       unsigned precision)
+  {
+    const float TOLERANCE = 10.0F / pow(10.0F, static_cast<float>(precision));
+    ASSERT_FALSE(lhs.empty());
+    ASSERT_EQ(lhs.back(), 's');
+    float lhs_v = std::stof(string{lhs, 0, lhs.find('s')});
+    ASSERT_NE(lhs.npos, lhs.find('.'));
+    ASSERT_EQ(precision, lhs.find('s') - lhs.find('.') - 1);
+
+    ASSERT_FALSE(rhs.empty());
+    ASSERT_EQ(rhs.back(), 's');
+    float rhs_v = std::stof(string{rhs, 0, rhs.find('s')});
+    EXPECT_NEAR(lhs_v, rhs_v, TOLERANCE);
+    ASSERT_NE(rhs.npos, rhs.find('.'));
+    EXPECT_EQ(precision, rhs.find('s') - rhs.find('.') - 1);
+  }
+}
+
+TEST(TimeDurations, print) {
+  float_format_eq("0.123456700s",
+                  to_string(std::chrono::duration_cast<ceph::timespan>(0.1234567s)),
+                  9);
+  float_format_eq("-0.123456700s",
+                  to_string(std::chrono::duration_cast<ceph::signedspan>(-0.1234567s)),
+                  9);
+  EXPECT_EQ("42s", to_string(42s));
+  float_format_eq("0.123000000s", to_string(123ms), 9);
+}