1 files changed, 132 insertions, 0 deletions
diff --git a/src/components/utils/test/conditional_variable_test.cc b/src/components/utils/test/conditional_variable_test.cc
new file mode 100644
index 000000000..a898732ff
--- /dev/null
+++ b/src/components/utils/test/conditional_variable_test.cc
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 2015, Ford Motor Company
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * Redistributions of source code must retain the above copyright notice, this
+ * list of conditions and the following disclaimer.
+ *
+ * Redistributions in binary form must reproduce the above copyright notice,
+ * this list of conditions and the following
+ * disclaimer in the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * Neither the name of the Ford Motor Company nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <pthread.h>
+#include <iostream>
+
+#include "lock.h"
+#include "macro.h"
+
+#include "gtest/gtest.h"
+#include "utils/conditional_variable.h"
+
+namespace test {
+namespace components {
+namespace utils {
+
+class ConditionalVariableTest : public ::testing::Test {
+ public:
+  ConditionalVariableTest()
+      : test_value_("initialized"),
+        counter_(0) {
+  }
+  void check_counter();
+  void task_one();
+
+  static void* check_counter_helper(void *context) {
+    (reinterpret_cast<ConditionalVariableTest *>(context))->check_counter();
+    return NULL;
+  }
+
+  static void* task_one_helper(void *context) {
+    (reinterpret_cast<ConditionalVariableTest *>(context))->task_one();
+    return NULL;
+  }
+ protected:
+  std::string test_value_;
+  sync_primitives::ConditionalVariable cond_var_;
+  sync_primitives::Lock test_mutex_;
+  unsigned counter_;
+};
+
+// Defines threads behaviour which depends on counter value
+void ConditionalVariableTest::check_counter() {
+  sync_primitives::AutoLock test_lock(test_mutex_);
+  if (counter_ <= 1) {
+    counter_++;
+    cond_var_.Wait(test_mutex_);  // Mutex unlock & Thread sleeps until Notification
+  }
+  else if(counter_ == 2) {  // Checking for equal 2 in this specific case. Because we were waiting for 2 threads to be finished
+    cond_var_.Broadcast();  // Notify All threads waiting on conditional variable
+  }
+}
+
+// Tasks for threads to begin with
+void ConditionalVariableTest::task_one() {
+  sync_primitives::AutoLock test_lock(test_mutex_);
+  test_value_ = "changed by thread 1";
+  cond_var_.NotifyOne();  // Notify At least one thread waiting on conditional variable
+  test_value_ = "changed again by thread 1";
+}
+
+TEST_F(ConditionalVariableTest, CheckNotifyOne_OneThreadNotified_ExpectSuccessful) {
+  pthread_t thread1;
+  sync_primitives::AutoLock test_lock(test_mutex_);
+  test_value_ = "changed by main thread";
+  const bool thread_created = pthread_create(&thread1,
+      NULL,
+      &ConditionalVariableTest::task_one_helper,
+      this);
+  ASSERT_FALSE(thread_created) << "thread1 is not created!";
+  test_value_ = "changed twice by main thread";
+  cond_var_.WaitFor(test_lock, 2000);
+  std::string last_value("changed again by thread 1");
+  EXPECT_EQ(last_value, test_value_);
+}
+
+TEST_F(ConditionalVariableTest, CheckBroadcast_AllThreadsNotified_ExpectSuccessful) {
+  pthread_t thread1;
+  pthread_t thread2;
+  bool thread_created = pthread_create(&thread1,
+      NULL,
+      &ConditionalVariableTest::check_counter_helper,
+      this);
+  ASSERT_FALSE(thread_created) << "thread1 is not created!";
+  thread_created = pthread_create(&thread2,
+      NULL,
+      &ConditionalVariableTest::check_counter_helper,
+      this);
+  ASSERT_FALSE(thread_created) << "thread2 is not created!";
+  check_counter();
+  EXPECT_EQ(2u, counter_);
+}
+
+TEST_F(ConditionalVariableTest, CheckWaitForWithTimeout1sec_ThreadBlockedForTimeout_ExpectSuccessfulWakeUp) {
+  sync_primitives::AutoLock test_lock(test_mutex_);
+  sync_primitives::ConditionalVariable::WaitStatus wait_st = cond_var_.WaitFor(test_lock, 1000);
+  EXPECT_EQ(sync_primitives::ConditionalVariable::kTimeout, wait_st);
+}
+
+}  // namespace utils
+}  // namespace components
+}  // namespace test
+