[iOS NC] LSC: Separate third_party/nearby/internal/platform/implementation/ios to

- third_party/nearby/internal/platform/implementation/ios (for platform)
- third_party/nearby/connections/clients/ios (for connections)
- third_party/nearby/connections/samples/ios (for sample codes)

PiperOrigin-RevId: 440895852

internal/platform/implementation/ios/atomic_uint32_test.cc

@@ -0,0 +1,64 @@
+// Copyright 2020 Google LLC
+//
+// 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 "internal/platform/implementation/ios/atomic_uint32.h"
+
+#include "gtest/gtest.h"
+#include "thread/fiber/fiber.h"
+
+namespace location {
+namespace nearby {
+namespace ios {
+namespace {
+
+TEST(AtomicUint32Test, GetOnSameThread) {
+  std::uint32_t initial_value = 1450;
+  AtomicUint32 atomic_reference_{initial_value};
+
+  EXPECT_EQ(initial_value, atomic_reference_.Get());
+}
+
+TEST(AtomicUint32Test, SetGetOnSameThread) {
+  std::uint32_t initial_value_ = 1450;
+  AtomicUint32 atomic_reference_{initial_value_};
+
+  std::uint32_t new_value = 28;
+  atomic_reference_.Set(new_value);
+  EXPECT_EQ(new_value, atomic_reference_.Get());
+}
+
+TEST(AtomicUint32Test, SetOnNewThread) {
+  std::uint32_t initial_value_ = 1450;
+  AtomicUint32 atomic_reference_{initial_value_};
+
+  std::uint32_t new_thread_value = 28;
+  thread::Fiber f([&] { atomic_reference_.Set(new_thread_value); });
+  f.Join();
+  EXPECT_EQ(new_thread_value, atomic_reference_.Get());
+}
+
+TEST(AtomicUint32Test, GetOnNewThread) {
+  std::uint32_t initial_value_ = 1450;
+  AtomicUint32 atomic_reference_{initial_value_};
+
+  std::uint32_t new_value = 28;
+  atomic_reference_.Set(new_value);
+  thread::Fiber f([&] { EXPECT_EQ(new_value, atomic_reference_.Get()); });
+  f.Join();
+}
+
+}  // namespace
+}  // namespace ios
+}  // namespace nearby
+}  // namespace location