Implemented submittable_executor and some other missed files

A file was named wrong. It was changed.

internal/platform/implementation/linux/scheduled_executor_test.cc

@@ -0,0 +1,179 @@
+// Copyright 2021 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/linux/scheduled_executor.h"
+
+#include <memory>
+#include <utility>
+
+#include "gtest/gtest.h"
+#include "absl/synchronization/notification.h"
+#include "absl/time/clock.h"
+#include "absl/time/time.h"
+#include "internal/platform/implementation/linux/test_data.h"
+
+namespace nearby {
+namespace linux {
+namespace {
+
+TEST(ScheduledExecutorTests, ExecuteSucceeds) {
+  absl::Notification notification;
+  // Arrange
+  std::string expected(RUNNABLE_0_TEXT.c_str());
+
+  auto submittableExecutor = std::make_unique<ScheduledExecutor>();
+  std::string output = std::string();
+  // Container to note threads that ran
+  std::unique_ptr<std::vector<std::thread::id>> threadIds =
+      std::make_unique<std::vector<std::thread::id>>();
+
+  threadIds->push_back(std::this_thread::get_id());
+
+  // Act
+  submittableExecutor->Execute([&]() {
+    threadIds->push_back(std::this_thread::get_id());
+    output.append(RUNNABLE_0_TEXT.c_str());
+    notification.Notify();
+  });
+
+  ASSERT_TRUE(
+      notification.WaitForNotificationWithTimeout(absl::Milliseconds(200)));
+  submittableExecutor->Shutdown();
+
+  //  Assert
+  //  We should've run 1 time on the main thread, and 1 times on the
+  //  workerThread
+  ASSERT_EQ(threadIds->size(), 2);
+  //  We should still be on the main thread
+  ASSERT_EQ(std::this_thread::get_id(), threadIds->at(0));
+  //  We should've run all runnables on the worker thread
+  ASSERT_EQ(output, expected);
+}
+
+TEST(ScheduledExecutorTests, ScheduleSucceeds) {
+  absl::Notification notification;
+  // Arrange
+  std::string expected(RUNNABLE_0_TEXT.c_str());
+
+  auto submittableExecutor = std::make_unique<ScheduledExecutor>();
+  std::string output = std::string();
+  // Container to note threads that ran
+  std::unique_ptr<std::vector<std::thread::id>> threadIds =
+      std::make_unique<std::vector<std::thread::id>>();
+
+  threadIds->push_back(std::this_thread::get_id());
+
+  std::chrono::system_clock::time_point timeNow =
+      std::chrono::system_clock::now();
+  std::chrono::system_clock::time_point timeExecuted;
+
+  // Act
+  submittableExecutor->Schedule(
+      [&]() {
+        timeExecuted = std::chrono::system_clock::now();
+        threadIds->push_back(std::this_thread::get_id());
+        output.append(RUNNABLE_0_TEXT.c_str());
+        notification.Notify();
+      },
+      absl::Milliseconds(50));
+
+  ASSERT_TRUE(
+      notification.WaitForNotificationWithTimeout(absl::Milliseconds(200)));
+  submittableExecutor->Shutdown();
+
+  ASSERT_EQ(threadIds->size(), 2);
+  //  We should still be on the main thread
+  ASSERT_EQ(std::this_thread::get_id(), threadIds->at(0));
+  //  We should've run all runnables on the worker thread
+  ASSERT_EQ(output, expected);
+}
+
+TEST(ScheduledExecutorTests, CancelSucceeds) {
+  absl::Notification notification;
+  // Arrange
+  std::string expected("");
+
+  auto submittableExecutor = std::make_unique<ScheduledExecutor>();
+  std::string output = std::string();
+  // Container to note threads that ran
+  std::unique_ptr<std::vector<std::thread::id>> threadIds =
+      std::make_unique<std::vector<std::thread::id>>();
+
+  threadIds->push_back(std::this_thread::get_id());
+
+  // Act
+  auto cancelable = submittableExecutor->Schedule(
+      [&]() {
+        threadIds->push_back(std::this_thread::get_id());
+        output.append(RUNNABLE_0_TEXT.c_str());
+        notification.Notify();
+      },
+      absl::Milliseconds(1000));
+
+  auto actual = cancelable->Cancel();
+
+  EXPECT_FALSE(
+      notification.WaitForNotificationWithTimeout(absl::Milliseconds(2000)));
+  submittableExecutor->Shutdown();
+
+  // Assert
+  ASSERT_TRUE(actual);
+  ASSERT_EQ(threadIds->size(), 1);
+  //  We should still be on the main thread
+  ASSERT_EQ(std::this_thread::get_id(), threadIds->at(0));
+  //  We should've run all runnables on the worker thread
+  ASSERT_EQ(output, expected);
+}
+
+TEST(ScheduledExecutorTests, CancelAfterStartedFails) {
+  absl::Notification notification;
+  // Arrange
+  std::string expected(RUNNABLE_0_TEXT.c_str());
+
+  auto submittableExecutor = std::make_unique<ScheduledExecutor>();
+  std::string output = std::string();
+  // Container to note threads that ran
+  std::unique_ptr<std::vector<std::thread::id>> threadIds =
+      std::make_unique<std::vector<std::thread::id>>();
+
+  threadIds->push_back(std::this_thread::get_id());
+
+  // Act
+  auto cancelable = submittableExecutor->Schedule(
+      [&]() {
+        threadIds->push_back(std::this_thread::get_id());
+        output.append(RUNNABLE_0_TEXT.c_str());
+        notification.Notify();
+      },
+      absl::Milliseconds(100));
+
+  absl::SleepFor(absl::Milliseconds(200));
+  auto actual = cancelable->Cancel();
+
+  ASSERT_TRUE(
+      notification.WaitForNotificationWithTimeout(absl::Milliseconds(2000)));
+  submittableExecutor->Shutdown();
+
+  // Assert
+  ASSERT_FALSE(actual);
+  ASSERT_EQ(threadIds->size(), 2);
+  //  We should still be on the main thread
+  ASSERT_EQ(std::this_thread::get_id(), threadIds->at(0));
+  //  We should've run all runnables on the worker thread
+  ASSERT_EQ(output, expected);
+}
+
+}  // namespace
+}  // namespace linux
+}  // namespace nearby