move tests to separate dir

create macro "pip_test()" for easily add new tests

tests/concurrent/ExecutorIntegrationTest.cpp

@@ -0,0 +1,54 @@
+#include "gtest/gtest.h"
+#include "pithreadpoolexecutor.h"
+#include "pimutex.h"
+
+const int WAIT_THREAD_TIME_MS = 30;
+
+TEST(ExcutorIntegrationTest, execute_is_runnable_invoke) {
+    PIMutex m;
+    int invokedRunnables = 0;
+    PIThreadPoolExecutor executorService(1);
+    executorService.execute([&]() {
+        m.lock();
+        invokedRunnables++;
+        m.unlock();
+    });
+    piMSleep(WAIT_THREAD_TIME_MS);
+    ASSERT_EQ(invokedRunnables, 1);
+}
+
+TEST(ExcutorIntegrationTest, execute_is_not_execute_after_shutdown) {
+    bool isRunnableInvoke = false;
+    PIThreadPoolExecutor executorService(1);
+    executorService.shutdown();
+    executorService.execute([&]() {
+        isRunnableInvoke = true;
+    });
+    piMSleep(WAIT_THREAD_TIME_MS);
+    ASSERT_FALSE(isRunnableInvoke);
+}
+
+TEST(ExcutorIntegrationTest, execute_is_execute_before_shutdown) {
+    bool isRunnableInvoke = false;
+    PIThreadPoolExecutor executorService(1);
+    executorService.execute([&]() {
+        piMSleep(WAIT_THREAD_TIME_MS);
+        isRunnableInvoke = true;
+    });
+    executorService.shutdown();
+    piMSleep(2 * WAIT_THREAD_TIME_MS);
+    ASSERT_TRUE(isRunnableInvoke);
+}
+
+TEST(ExcutorIntegrationTest, execute_is_awaitTermination_wait) {
+    PIThreadPoolExecutor executorService(1);
+    executorService.execute([&]() {
+        piMSleep(2 * WAIT_THREAD_TIME_MS);
+    });
+    executorService.shutdown();
+    PITimeMeasurer measurer;
+    ASSERT_TRUE(executorService.awaitTermination(3 * WAIT_THREAD_TIME_MS));
+    double waitTime = measurer.elapsed_m();
+    ASSERT_GE(waitTime, WAIT_THREAD_TIME_MS);
+    ASSERT_LE(waitTime, 4 * WAIT_THREAD_TIME_MS);
+}