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Diffstat (limited to 'absl/strings/internal/cordz_update_tracker_test.cc')
-rw-r--r-- | absl/strings/internal/cordz_update_tracker_test.cc | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/absl/strings/internal/cordz_update_tracker_test.cc b/absl/strings/internal/cordz_update_tracker_test.cc new file mode 100644 index 00000000..45782046 --- /dev/null +++ b/absl/strings/internal/cordz_update_tracker_test.cc @@ -0,0 +1,130 @@ +// Copyright 2021 The Abseil Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#include "absl/strings/internal/cordz_update_tracker.h" + +#include <array> +#include <thread> // NOLINT + +#include "gmock/gmock.h" +#include "gtest/gtest.h" +#include "absl/base/attributes.h" +#include "absl/base/config.h" +#include "absl/synchronization/notification.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace cord_internal { +namespace { + +using ::testing::AnyOf; +using ::testing::Eq; + +using Method = CordzUpdateTracker::MethodIdentifier; +using Methods = std::array<Method, Method::kNumMethods>; + +// Returns an array of all methods defined in `MethodIdentifier` +Methods AllMethods() { + return Methods{Method::kAssignString, Method::kAssignCord, + Method::kMoveAssignCord, Method::kAppendString, + Method::kAppendCord, Method::kMoveAppendCord, + Method::kPrependString, Method::kPrependCord, + Method::kMovePrependCord, Method::kAppendExternalMemory, + Method::kFlatten, Method::kGetAppendRegion, + Method::kRemovePrefix, Method::kRemoveSuffic, + Method::kSubCord}; +} + +TEST(CordzUpdateTracker, IsConstExprAndInitializesToZero) { + constexpr CordzUpdateTracker tracker; + for (Method method : AllMethods()) { + ASSERT_THAT(tracker.Value(method), Eq(0)); + } +} + +TEST(CordzUpdateTracker, LossyAdd) { + int64_t n = 1; + CordzUpdateTracker tracker; + for (Method method : AllMethods()) { + tracker.LossyAdd(method, n); + EXPECT_THAT(tracker.Value(method), Eq(n)); + n += 2; + } +} + +TEST(CordzUpdateTracker, CopyConstructor) { + int64_t n = 1; + CordzUpdateTracker src; + for (Method method : AllMethods()) { + src.LossyAdd(method, n); + n += 2; + } + + n = 1; + CordzUpdateTracker tracker(src); + for (Method method : AllMethods()) { + EXPECT_THAT(tracker.Value(method), Eq(n)); + n += 2; + } +} + +TEST(CordzUpdateTracker, OperatorAssign) { + int64_t n = 1; + CordzUpdateTracker src; + CordzUpdateTracker tracker; + for (Method method : AllMethods()) { + src.LossyAdd(method, n); + n += 2; + } + + n = 1; + tracker = src; + for (Method method : AllMethods()) { + EXPECT_THAT(tracker.Value(method), Eq(n)); + n += 2; + } +} + +TEST(CordzUpdateTracker, ThreadSanitizedValueCheck) { + absl::Notification done; + CordzUpdateTracker tracker; + + std::thread reader([&done, &tracker] { + while (!done.HasBeenNotified()) { + int n = 1; + for (Method method : AllMethods()) { + EXPECT_THAT(tracker.Value(method), AnyOf(Eq(n), Eq(0))); + n += 2; + } + } + int n = 1; + for (Method method : AllMethods()) { + EXPECT_THAT(tracker.Value(method), Eq(n)); + n += 2; + } + }); + + int64_t n = 1; + for (Method method : AllMethods()) { + tracker.LossyAdd(method, n); + n += 2; + } + done.Notify(); + reader.join(); +} + +} // namespace +} // namespace cord_internal +ABSL_NAMESPACE_END +} // namespace absl |