cyber: add unit test for condition_notifier

cyber/transport/BUILD

@@ -551,4 +551,14 @@ cc_test(
     ],
 )
 
+cc_test(
+    name = "condition_notifier_test",
+    size = "small",
+    srcs = ["shm/condition_notifier_test.cc"],
+    deps = [
+        "//cyber:cyber_core",
+        "@gtest//:main",
+    ],
+)
+
 cpplint()

cyber/transport/shm/condition_notifier_test.cc

+/******************************************************************************
+ * Copyright 2019 The Apollo Authors. All Rights Reserved.
+ *
+ * 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
+ *
+ * http://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 "cyber/transport/shm/condition_notifier.h"
+
+#include "gtest/gtest.h"
+
+namespace apollo {
+namespace cyber {
+namespace transport {
+
+TEST(ConditionNotifierTest, constructor) {
+  auto notifier = ConditionNotifier::Instance();
+  EXPECT_NE(notifier, nullptr);
+}
+
+TEST(ConditionNotifierTest, notify_listen) {
+  auto notifier = ConditionNotifier::Instance();
+  ReadableInfo readable_info;
+  while (notifier->Listen(100, &readable_info)) {
+  }
+  EXPECT_FALSE(notifier->Listen(100, &readable_info));
+  EXPECT_TRUE(notifier->Notify(readable_info));
+  EXPECT_TRUE(notifier->Listen(100, &readable_info));
+  EXPECT_FALSE(notifier->Listen(100, &readable_info));
+  EXPECT_TRUE(notifier->Notify(readable_info));
+  EXPECT_TRUE(notifier->Notify(readable_info));
+  EXPECT_TRUE(notifier->Listen(100, &readable_info));
+  EXPECT_TRUE(notifier->Listen(100, &readable_info));
+  EXPECT_FALSE(notifier->Listen(100, &readable_info));
+}
+
+TEST(ConditionNotifierTest, shutdown) {
+  auto notifier = ConditionNotifier::Instance();
+  notifier->Shutdown();
+  ReadableInfo readable_info;
+  EXPECT_FALSE(notifier->Notify(readable_info));
+  EXPECT_FALSE(notifier->Listen(100, &readable_info));
+}
+
+}  // namespace transport
+}  // namespace cyber
+}  // namespace apollo