/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "FOGFixture.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
#include "mozilla/glean/GleanTestsTestMetrics.h"
#include "mozilla/glean/GleanPings.h"
#include "mozilla/glean/fog_ffi_generated.h"
#include "mozilla/Maybe.h"
#include "mozilla/Result.h"
#include "mozilla/ResultVariant.h"
#include "mozilla/TimeStamp.h"
#include "../../bindings/private/Common.h"

#include "nsTArray.h"

#include "mozilla/Preferences.h"
#include "mozilla/Unused.h"
#include "nsString.h"
#include "prtime.h"

using mozilla::Preferences;
using mozilla::TimeDuration;
using namespace mozilla::glean;
using namespace mozilla::glean::impl;

#define DATA_PREF "datareporting.healthreport.uploadEnabled"

extern "C" {
// This function is called by the rust code in test.rs if a non-fatal test
// failure occurs.
void GTest_FOG_ExpectFailure(const char* aMessage) {
  EXPECT_STREQ(aMessage, "");
}
}

TEST_F(FOGFixture, BuiltinPingsRegistered) {
  Preferences::SetInt("telemetry.fog.test.localhost_port", -1);
  nsAutoCString metricsPingName("metrics");
  nsAutoCString baselinePingName("baseline");
  nsAutoCString eventsPingName("events");
  ASSERT_EQ(NS_OK, fog_submit_ping(&metricsPingName));
  ASSERT_EQ(NS_OK, fog_submit_ping(&baselinePingName));
  ASSERT_EQ(NS_OK, fog_submit_ping(&eventsPingName));
}

TEST_F(FOGFixture, TestCppCounterWorks) {
  mozilla::glean::test_only::bad_code.Add(42);

  ASSERT_EQ(42, mozilla::glean::test_only::bad_code.TestGetValue("test-ping"_ns)
                    .unwrap()
                    .value());
  // And test that the ping name's optional, while you're at it:
  ASSERT_EQ(42, test_only::bad_code.TestGetValue().unwrap().value());
}

TEST_F(FOGFixture, TestCppStringWorks) {
  auto kValue = "cheez!"_ns;
  mozilla::glean::test_only::cheesy_string.Set(kValue);

  ASSERT_STREQ(kValue.get(), mozilla::glean::test_only::cheesy_string
                                 .TestGetValue("test-ping"_ns)
                                 .unwrap()
                                 .value()
                                 .get());
}

TEST_F(FOGFixture, TestCppTimespanWorks) {
  mozilla::glean::test_only::can_we_time_it.Start();
  PR_Sleep(PR_MillisecondsToInterval(10));
  mozilla::glean::test_only::can_we_time_it.Stop();

  ASSERT_TRUE(
      mozilla::glean::test_only::can_we_time_it.TestGetValue("test-ping"_ns)
          .unwrap()
          .value() > 0);
}

TEST_F(FOGFixture, TestCppUuidWorks) {
  nsCString kTestUuid("decafdec-afde-cafd-ecaf-decafdecafde");
  test_only::what_id_it.Set(kTestUuid);
  ASSERT_STREQ(kTestUuid.get(),
               test_only::what_id_it.TestGetValue("test-ping"_ns)
                   .unwrap()
                   .value()
                   .get());

  test_only::what_id_it.GenerateAndSet();
  // Since we generate v4 UUIDs, and the first character of the third group
  // isn't 4, this won't ever collide with kTestUuid.
  ASSERT_STRNE(kTestUuid.get(),
               test_only::what_id_it.TestGetValue("test-ping"_ns)
                   .unwrap()
                   .value()
                   .get());
}

TEST_F(FOGFixture, TestCppBooleanWorks) {
  mozilla::glean::test_only::can_we_flag_it.Set(false);

  ASSERT_EQ(false, mozilla::glean::test_only::can_we_flag_it
                       .TestGetValue("test-ping"_ns)
                       .unwrap()
                       .value());
}

MATCHER_P(BitEq, x, "bit equal") {
  static_assert(sizeof(x) == sizeof(arg));
  return std::memcmp(&arg, &x, sizeof(x)) == 0;
}

TEST_F(FOGFixture, TestCppDatetimeWorks) {
  PRExplodedTime date{0, 35, 10, 12, 6, 10, 2020, 0, 0, {5 * 60 * 60, 0}};
  test_only::what_a_date.Set(&date);

  auto received = test_only::what_a_date.TestGetValue("test-ping"_ns).unwrap();
  ASSERT_THAT(received.value(), BitEq(date));
}

using mozilla::Some;
using mozilla::glean::test_only_ipc::AnEventExtra;
using mozilla::glean::test_only_ipc::EventWithExtraExtra;
using std::tuple;

TEST_F(FOGFixture, TestCppEventWorks) {
  test_only_ipc::no_extra_event.Record();
  ASSERT_TRUE(test_only_ipc::no_extra_event.TestGetValue("test-ping"_ns)
                  .unwrap()
                  .isSome());

  AnEventExtra extra = {.extra1 = Some("can set extras"_ns)};
  test_only_ipc::an_event.Record(Some(extra));
  auto optEvents =
      test_only_ipc::an_event.TestGetValue("test-ping"_ns).unwrap();
  ASSERT_TRUE(optEvents.isSome());

  auto events = optEvents.extract();
  ASSERT_EQ(1UL, events.Length());
  ASSERT_STREQ("test_only.ipc", events[0].mCategory.get());
  ASSERT_STREQ("an_event", events[0].mName.get());
  ASSERT_EQ(1UL, events[0].mExtra.Length());
  ASSERT_STREQ("extra1", std::get<0>(events[0].mExtra[0]).get());
  ASSERT_STREQ("can set extras", std::get<1>(events[0].mExtra[0]).get());
}

TEST_F(FOGFixture, TestCppEventsWithDifferentExtraTypes) {
  EventWithExtraExtra extra = {.extra1 = Some("can set extras"_ns),
                               .extra2 = Some(37),
                               .extra3LongerName = Some(false)};
  test_only_ipc::event_with_extra.Record(Some(extra));
  auto optEvents =
      test_only_ipc::event_with_extra.TestGetValue("test-ping"_ns).unwrap();
  ASSERT_TRUE(optEvents.isSome());

  auto events = optEvents.extract();
  ASSERT_EQ(1UL, events.Length());

  // The list of extra key/value pairs can be in any order.
  ASSERT_EQ(3UL, events[0].mExtra.Length());
  for (auto extra : events[0].mExtra) {
    auto key = std::get<0>(extra);
    auto value = std::get<1>(extra);

    if (key == "extra1"_ns) {
      ASSERT_STREQ("can set extras", value.get());
    } else if (key == "extra2"_ns) {
      ASSERT_STREQ("37", value.get());
    } else if (key == "extra3_longer_name"_ns) {
      ASSERT_STREQ("false", value.get());
    } else {
      ASSERT_TRUE(false)
      << "Invalid extra item recorded.";
    }
  }
}

TEST_F(FOGFixture, TestCppMemoryDistWorks) {
  test_only::do_you_remember.Accumulate(7);
  test_only::do_you_remember.Accumulate(17);

  DistributionData data =
      test_only::do_you_remember.TestGetValue("test-ping"_ns).unwrap().ref();
  // Sum is in bytes, test_only::do_you_remember is in megabytes. So
  // multiplication ahoy!
  ASSERT_EQ(data.sum, 24UL * 1024 * 1024);
  ASSERT_EQ(data.count, 2UL);
  for (const auto& entry : data.values) {
    const uint64_t bucket = entry.GetKey();
    const uint64_t count = entry.GetData();
    ASSERT_TRUE(count == 0 ||
                (count == 1 && (bucket == 17520006 || bucket == 7053950)))
    << "Only two occupied buckets";
  }
}

TEST_F(FOGFixture, TestCppCustomDistWorks) {
  test_only_ipc::a_custom_dist.AccumulateSamples({7, 268435458});

  DistributionData data =
      test_only_ipc::a_custom_dist.TestGetValue("test-ping"_ns).unwrap().ref();
  ASSERT_EQ(data.sum, 7UL + 268435458);
  ASSERT_EQ(data.count, 2UL);
  for (const auto& entry : data.values) {
    const uint64_t bucket = entry.GetKey();
    const uint64_t count = entry.GetData();
    ASSERT_TRUE(count == 0 ||
                (count == 1 && (bucket == 1 || bucket == 268435456)))
    << "Only two occupied buckets";
  }
}

TEST_F(FOGFixture, TestCppPings) {
  const auto& ping = mozilla::glean_pings::OnePingOnly;

  test_only::one_ping_one_bool.Set(false);

  {
    bool submitted = false;

    ping.TestBeforeNextSubmit([&submitted](const nsACString& aReason) {
      submitted = true;
      ASSERT_EQ(false,
                test_only::one_ping_one_bool.TestGetValue().unwrap().ref());
    });
    ping.Submit();

    ASSERT_TRUE(submitted)
    << "Must have actually called the lambda.";
  }

  test_only::one_ping_one_bool.Set(false);

  ASSERT_TRUE(ping.TestSubmission(
      [](const nsACString& aReason) {
        ASSERT_EQ(false,
                  test_only::one_ping_one_bool.TestGetValue().unwrap().ref());
      },
      [&]() { ping.Submit(); }))
  << "Must submit ping";
}

TEST_F(FOGFixture, TestCppStringLists) {
  auto kValue = "cheez!"_ns;
  auto kValue2 = "cheezier!"_ns;
  auto kValue3 = "cheeziest."_ns;

  nsTArray<nsCString> cheezList;
  cheezList.EmplaceBack(kValue);
  cheezList.EmplaceBack(kValue2);

  test_only::cheesy_string_list.Set(cheezList);

  auto val = test_only::cheesy_string_list.TestGetValue().unwrap().value();
  // Note: This is fragile if the order is ever not preserved.
  ASSERT_STREQ(kValue.get(), val[0].get());
  ASSERT_STREQ(kValue2.get(), val[1].get());

  test_only::cheesy_string_list.Add(kValue3);

  val = test_only::cheesy_string_list.TestGetValue().unwrap().value();
  ASSERT_STREQ(kValue3.get(), val[2].get());
}

TEST_F(FOGFixture, TestCppTimingDistWorks) {
  auto id1 = test_only::what_time_is_it.Start();
  auto id2 = test_only::what_time_is_it.Start();
  PR_Sleep(PR_MillisecondsToInterval(5));
  auto id3 = test_only::what_time_is_it.Start();
  test_only::what_time_is_it.Cancel(std::move(id1));
  PR_Sleep(PR_MillisecondsToInterval(5));
  test_only::what_time_is_it.StopAndAccumulate(std::move(id2));
  test_only::what_time_is_it.StopAndAccumulate(std::move(id3));

  DistributionData data =
      test_only::what_time_is_it.TestGetValue().unwrap().ref();

  // Cancelled timers should not increase count.
  ASSERT_EQ(data.count, 2UL);

  const uint64_t NANOS_IN_MILLIS = 1e6;

  // bug 1701847 - Sleeps don't necessarily round up as you'd expect.
  // Give ourselves a 200000ns (0.2ms) window to be off on fast machines.
  const uint64_t EPSILON = 200000;

  // We don't know exactly how long those sleeps took, only that it was at
  // least 15ms total.
  ASSERT_GT(data.sum, (uint64_t)(15 * NANOS_IN_MILLIS) - EPSILON);

  // We also can't guarantee the buckets, but we can guarantee two samples.
  uint64_t sampleCount = 0;
  for (const auto& value : data.values.Values()) {
    sampleCount += value;
  }
  ASSERT_EQ(sampleCount, (uint64_t)2);
}

TEST_F(FOGFixture, TestCppTimingDistNegativeDuration) {
  // Intentionally a negative duration to test the error case.
  auto negDuration = TimeDuration::FromSeconds(-1);
  test_only::what_time_is_it.AccumulateRawDuration(negDuration);

  ASSERT_EQ(mozilla::Nothing(),
            test_only::what_time_is_it.TestGetValue().unwrap());
}

TEST_F(FOGFixture, TestCppTimingDistMeasure) {
  // Let's test Measure and its RAII AutoTimer
  {
    auto t1 = test_only::what_time_is_it.Measure();
    auto t2 = test_only::what_time_is_it.Measure();
    PR_Sleep(PR_MillisecondsToInterval(5));
    {
      auto t3 = test_only::what_time_is_it.Measure();
      t1.Cancel();
      PR_Sleep(PR_MillisecondsToInterval(5));
    }
  }
  DistributionData data =
      test_only::what_time_is_it.TestGetValue().unwrap().ref();

  // Cancelled timers should not increase count.
  ASSERT_EQ(data.count, 2UL);

  const uint64_t NANOS_IN_MILLIS = 1e6;

  // bug 1701847 - Sleeps don't necessarily round up as you'd expect.
  // Give ourselves a 200000ns (0.2ms) window to be off on fast machines.
  const uint64_t EPSILON = 200000;

  // We don't know exactly how long those sleeps took, only that it was at
  // least 15ms total.
  ASSERT_GT(data.sum, (uint64_t)(15 * NANOS_IN_MILLIS) - EPSILON);

  // We also can't guarantee the buckets, but we can guarantee two samples.
  uint64_t sampleCount = 0;
  for (const auto& value : data.values.Values()) {
    sampleCount += value;
  }
  ASSERT_EQ(sampleCount, (uint64_t)2);
}

TEST_F(FOGFixture, TestLabeledBooleanWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_like_balloons.Get("hot_air"_ns)
                .TestGetValue()
                .unwrap());
  test_only::mabels_like_balloons.Get("hot_air"_ns).Set(true);
  test_only::mabels_like_balloons.Get("helium"_ns).Set(false);
  ASSERT_EQ(true, test_only::mabels_like_balloons.Get("hot_air"_ns)
                      .TestGetValue()
                      .unwrap()
                      .ref());
  ASSERT_EQ(false, test_only::mabels_like_balloons.Get("helium"_ns)
                       .TestGetValue()
                       .unwrap()
                       .ref());
}

TEST_F(FOGFixture, TestLabeledBooleanWithLabelsWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_like_labeled_balloons
                .EnumGet(test_only::MabelsLikeLabeledBalloonsLabel::eWater)
                .TestGetValue()
                .unwrap());
  test_only::mabels_like_labeled_balloons
      .EnumGet(test_only::MabelsLikeLabeledBalloonsLabel::eWater)
      .Set(true);
  test_only::mabels_like_labeled_balloons
      .EnumGet(test_only::MabelsLikeLabeledBalloonsLabel::eBirthdayParty)
      .Set(false);
  ASSERT_EQ(true,
            test_only::mabels_like_labeled_balloons
                .EnumGet(test_only::MabelsLikeLabeledBalloonsLabel::eWater)
                .TestGetValue()
                .unwrap()
                .ref());
  ASSERT_EQ(
      false,
      test_only::mabels_like_labeled_balloons
          .EnumGet(test_only::MabelsLikeLabeledBalloonsLabel::eBirthdayParty)
          .TestGetValue()
          .unwrap()
          .ref());
}

TEST_F(FOGFixture, TestLabeledCounterWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_kitchen_counters.Get("marble"_ns)
                .TestGetValue()
                .unwrap());
  test_only::mabels_kitchen_counters.Get("marble"_ns).Add(1);
  test_only::mabels_kitchen_counters.Get("laminate"_ns).Add(2);
  ASSERT_EQ(1, test_only::mabels_kitchen_counters.Get("marble"_ns)
                   .TestGetValue()
                   .unwrap()
                   .ref());
  ASSERT_EQ(2, test_only::mabels_kitchen_counters.Get("laminate"_ns)
                   .TestGetValue()
                   .unwrap()
                   .ref());
}

TEST_F(FOGFixture, TestLabeledCounterWithLabelsWorks) {
  ASSERT_EQ(
      mozilla::Nothing(),
      test_only::mabels_labeled_counters
          .EnumGet(test_only::MabelsLabeledCountersLabel::eNextToTheFridge)
          .TestGetValue()
          .unwrap());
  test_only::mabels_labeled_counters
      .EnumGet(test_only::MabelsLabeledCountersLabel::eNextToTheFridge)
      .Add(1);
  test_only::mabels_labeled_counters
      .EnumGet(test_only::MabelsLabeledCountersLabel::eClean)
      .Add(2);
  test_only::mabels_labeled_counters
      .EnumGet(test_only::MabelsLabeledCountersLabel::e1stCounter)
      .Add(3);
  ASSERT_EQ(
      1, test_only::mabels_labeled_counters
             .EnumGet(test_only::MabelsLabeledCountersLabel::eNextToTheFridge)
             .TestGetValue()
             .unwrap()
             .ref());
  ASSERT_EQ(2, test_only::mabels_labeled_counters
                   .EnumGet(test_only::MabelsLabeledCountersLabel::eClean)
                   .TestGetValue()
                   .unwrap()
                   .ref());
  ASSERT_EQ(3, test_only::mabels_labeled_counters
                   .EnumGet(test_only::MabelsLabeledCountersLabel::e1stCounter)
                   .TestGetValue()
                   .unwrap()
                   .ref());
}

TEST_F(FOGFixture, TestLabeledStringWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_balloon_strings.Get("twine"_ns)
                .TestGetValue()
                .unwrap());
  test_only::mabels_balloon_strings.Get("twine"_ns).Set("seems acceptable"_ns);
  test_only::mabels_balloon_strings.Get("parachute_cord"_ns)
      .Set("preferred"_ns);
  ASSERT_STREQ("seems acceptable",
               test_only::mabels_balloon_strings.Get("twine"_ns)
                   .TestGetValue()
                   .unwrap()
                   .ref()
                   .get());
  ASSERT_STREQ("preferred",
               test_only::mabels_balloon_strings.Get("parachute_cord"_ns)
                   .TestGetValue()
                   .unwrap()
                   .ref()
                   .get());
}

TEST_F(FOGFixture, TestLabeledStringWithLabelsWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_balloon_labels
                .EnumGet(test_only::MabelsBalloonLabelsLabel::eCelebratory)
                .TestGetValue()
                .unwrap());
  test_only::mabels_balloon_labels
      .EnumGet(test_only::MabelsBalloonLabelsLabel::eCelebratory)
      .Set("for birthdays, etc."_ns);
  test_only::mabels_balloon_labels
      .EnumGet(test_only::MabelsBalloonLabelsLabel::eCelebratoryAndSnarky)
      .Set("for retirements and bridal showers"_ns);
  ASSERT_STREQ("for birthdays, etc.",
               test_only::mabels_balloon_labels
                   .EnumGet(test_only::MabelsBalloonLabelsLabel::eCelebratory)
                   .TestGetValue()
                   .unwrap()
                   .ref()
                   .get());
  ASSERT_STREQ(
      "for retirements and bridal showers",
      test_only::mabels_balloon_labels
          .EnumGet(test_only::MabelsBalloonLabelsLabel::eCelebratoryAndSnarky)
          .TestGetValue()
          .unwrap()
          .ref()
          .get());
}

TEST_F(FOGFixture, TestCppQuantityWorks) {
  // This joke only works in base 13.
  const uint32_t kValue = 6 * 9;
  mozilla::glean::test_only::meaning_of_life.Set(kValue);

  ASSERT_EQ(kValue, mozilla::glean::test_only::meaning_of_life.TestGetValue()
                        .unwrap()
                        .value());
}

TEST_F(FOGFixture, TestCppRateWorks) {
  // 1) Standard rate with internal denominator
  const int32_t kNum = 22;
  const int32_t kDen = 7;  // because I like pi, even just approximately.

  test_only_ipc::irate.AddToNumerator(kNum);
  test_only_ipc::irate.AddToDenominator(kDen);
  auto value = test_only_ipc::irate.TestGetValue().unwrap();
  ASSERT_EQ(kNum, value.ref().first);
  ASSERT_EQ(kDen, value.ref().second);

  // 2) Rate with external denominator
  test_only_ipc::rate_with_external_denominator.AddToNumerator(kNum);
  test_only_ipc::an_external_denominator.Add(kDen);
  value = test_only_ipc::rate_with_external_denominator.TestGetValue().unwrap();
  ASSERT_EQ(kNum, value.ref().first);
  ASSERT_EQ(kDen, value.ref().second);
  ASSERT_EQ(
      kDen,
      test_only_ipc::an_external_denominator.TestGetValue().unwrap().extract());
}

TEST_F(FOGFixture, TestCppUrlWorks) {
  auto kValue = "https://example.com/fog/gtest"_ns;
  mozilla::glean::test_only_ipc::a_url.Set(kValue);

  ASSERT_STREQ(kValue.get(),
               mozilla::glean::test_only_ipc::a_url.TestGetValue("test-ping"_ns)
                   .unwrap()
                   .value()
                   .get());
}

TEST_F(FOGFixture, TestCppTextWorks) {
  auto kValue =
      "République is a French-inspired bakery, café, bar and formal dining room located in the Mid-city neighborhood of Los Angeles, set in a historic 1928 space ..."_ns;
  mozilla::glean::test_only_ipc::a_text.Set(kValue);
  ASSERT_STREQ(kValue.get(),
               mozilla::glean::test_only_ipc::a_text.TestGetValue()
                   .unwrap()
                   .value()
                   .get());
}

TEST_F(FOGFixture, TestLabeledCustomDistributionWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::mabels_custom_label_lengths.Get("officeSupplies"_ns)
                .TestGetValue()
                .unwrap());
  test_only::mabels_custom_label_lengths.Get("officeSupplies"_ns)
      .AccumulateSamples({7, 268435458});

  DistributionData data =
      test_only::mabels_custom_label_lengths.Get("officeSupplies"_ns)
          .TestGetValue()
          .unwrap()
          .ref();
  ASSERT_EQ(data.sum, 7UL + 268435458);
  ASSERT_EQ(data.count, 2UL);
  for (const auto& entry : data.values) {
    const uint64_t bucket = entry.GetKey();
    const uint64_t count = entry.GetData();
    ASSERT_TRUE(count == 0 ||
                (count == 1 && (bucket == 1 || bucket == 268435456)))
    << "Only two occupied buckets";
  }
}

TEST_F(FOGFixture, TestLabeledMemoryDistWorks) {
  test_only::what_do_you_remember.Get("bittersweet"_ns).Accumulate(7);
  test_only::what_do_you_remember.Get("bittersweet"_ns).Accumulate(17);

  DistributionData data = test_only::what_do_you_remember.Get("bittersweet"_ns)
                              .TestGetValue()
                              .unwrap()
                              .ref();
  // Sum is in bytes, test_only::what_do_you_remember is in megabytes. So
  // multiplication ahoy!
  ASSERT_EQ(data.sum, 24UL * 1024 * 1024);
  ASSERT_EQ(data.count, 2UL);
  for (const auto& entry : data.values) {
    const uint64_t bucket = entry.GetKey();
    const uint64_t count = entry.GetData();
    ASSERT_TRUE(count == 0 ||
                (count == 1 && (bucket == 17520006 || bucket == 7053950)))
    << "Only two occupied buckets";
  }
}

TEST_F(FOGFixture, TestLabeledTimingDistWorks) {
  auto id1 = test_only::where_has_the_time_gone.Get("UTC"_ns).Start();
  auto id2 = test_only::where_has_the_time_gone.Get("UTC"_ns).Start();
  PR_Sleep(PR_MillisecondsToInterval(5));
  auto id3 = test_only::where_has_the_time_gone.Get("UTC"_ns).Start();
  test_only::where_has_the_time_gone.Get("UTC"_ns).Cancel(std::move(id1));
  PR_Sleep(PR_MillisecondsToInterval(5));
  test_only::where_has_the_time_gone.Get("UTC"_ns).StopAndAccumulate(
      std::move(id2));
  test_only::where_has_the_time_gone.Get("UTC"_ns).StopAndAccumulate(
      std::move(id3));

  DistributionData data = test_only::where_has_the_time_gone.Get("UTC"_ns)
                              .TestGetValue()
                              .unwrap()
                              .ref();

  // Cancelled timers should not increase count.
  ASSERT_EQ(data.count, 2UL);

  const uint64_t NANOS_IN_MILLIS = 1e6;

  // bug 1701847 - Sleeps don't necessarily round up as you'd expect.
  // Give ourselves a 200000ns (0.2ms) window to be off on fast machines.
  const uint64_t EPSILON = 200000;

  // We don't know exactly how long those sleeps took, only that it was at
  // least 15ms total.
  ASSERT_GT(data.sum, (uint64_t)(15 * NANOS_IN_MILLIS) - EPSILON);

  // We also can't guarantee the buckets, but we can guarantee two samples.
  uint64_t sampleCount = 0;
  for (const auto& value : data.values.Values()) {
    sampleCount += value;
  }
  ASSERT_EQ(sampleCount, (uint64_t)2);
}

TEST_F(FOGFixture, TestLabeledTimingDistTruncateGet) {
  auto longKey =
      "this is a label that is longer than the new label limit of 111 characters introduced in bug 1959696 in April of 2025."_ns;

  auto sec = TimeDuration::FromMilliseconds(1);
  test_only::where_has_the_time_gone.MaybeTruncateAndGet(longKey)
      .AccumulateRawDuration(sec);

  DistributionData data =
      test_only::where_has_the_time_gone.MaybeTruncateAndGet(longKey)
          .TestGetValue()
          .unwrap()
          .ref();

  const uint64_t NANOS_IN_MILLIS = 1e6;
  ASSERT_EQ(data.sum, (uint64_t)(1 * NANOS_IN_MILLIS));

  // Double-check that short labels aren't transformed.
  auto shortKey = "some key"_ns;
  test_only::where_has_the_time_gone.MaybeTruncateAndGet(shortKey)
      .AccumulateRawDuration(sec);

  data = test_only::where_has_the_time_gone.Get(shortKey)
             .TestGetValue()
             .unwrap()
             .ref();
  ASSERT_EQ(data.sum, (uint64_t)(1 * NANOS_IN_MILLIS));

  // Let's make sure the long key correctly errors.
  test_only::where_has_the_time_gone.Get(longKey).AccumulateRawDuration(sec);
  ASSERT_TRUE(test_only::where_has_the_time_gone.MaybeTruncateAndGet(longKey)
                  .TestGetValue()
                  .isErr());
}

TEST_F(FOGFixture, TestLabeledQuantityWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::button_jars.Get("shirt"_ns).TestGetValue().unwrap());
  test_only::button_jars.Get("shirt"_ns).Set(42);
  test_only::button_jars.Get("push"_ns).Set(0);
  ASSERT_EQ(
      42, test_only::button_jars.Get("shirt"_ns).TestGetValue().unwrap().ref());
  ASSERT_EQ(
      0, test_only::button_jars.Get("push"_ns).TestGetValue().unwrap().ref());
}

TEST_F(FOGFixture, TestObjectWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::balloons.TestGetValueAsJSONString().unwrap());
  test_only::BalloonsObject balloons;
  balloons.EmplaceBack(test_only::BalloonsObjectItem{
      .colour = Some("blorange"_ns),
      .diameter = Some(42),
  });
  test_only::balloons.Set(balloons);

  // TODO(bug 1881023): Check the full obj, not just JSON substr.
  nsCString json =
      test_only::balloons.TestGetValueAsJSONString().unwrap().ref();
  ASSERT_THAT(json.get(), testing::HasSubstr("blorange"));
}

TEST_F(FOGFixture, TestComplexObjectWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only::crash_stack.TestGetValueAsJSONString().unwrap());
  test_only::CrashStackObject crash_obj{
      .status = Some("failure"_ns),
      .main_module = Some(17),
      .crash_info = mozilla::Nothing(),
      .modules = mozilla::Nothing(),
  };

  test_only::crash_stack.Set(crash_obj);

  // TODO(bug 1881023): Check the full obj, not just JSON substr.
  nsCString json =
      test_only::crash_stack.TestGetValueAsJSONString().unwrap().ref();
  ASSERT_THAT(json.get(), testing::HasSubstr("failure"));
}

TEST_F(FOGFixture, TestDualLabeledCounterWorks) {
  ASSERT_EQ(mozilla::Nothing(),
            test_only_ipc::a_dual_labeled_counter.Get("key"_ns, "category"_ns)
                .TestGetValue()
                .unwrap());
}

extern "C" void Rust_TestRustInGTest();
TEST_F(FOGFixture, TestRustInGTest) { Rust_TestRustInGTest(); }

extern "C" void Rust_TestJogfile();
TEST_F(FOGFixture, TestJogfile) { Rust_TestJogfile(); }

TEST_F(FOGFixture, IsCamelCaseWorks) {
  ASSERT_TRUE(IsCamelCase(u"someName"_ns));
  ASSERT_TRUE(IsCamelCase(u"s1234"_ns));
  ASSERT_TRUE(IsCamelCase(u"some"_ns));

  ASSERT_FALSE(IsCamelCase(u""_ns));
  ASSERT_FALSE(IsCamelCase(u"SomeName"_ns));
  ASSERT_FALSE(IsCamelCase(u"some_name"_ns));
  ASSERT_FALSE(IsCamelCase(u"SOMENAME"_ns));
  ASSERT_FALSE(IsCamelCase(u"1234"_ns));
  ASSERT_FALSE(IsCamelCase(u"some#Name"_ns));
}