Add POI unit test (#64)

Author: HadwaAbdelhalem

apis/poi/tests/UnitTests/HealthCheckTests.cs

@@ -2,7 +2,7 @@
 using Xunit;
 using poi.Models;
 
-namespace tests
+namespace UnitTests
 {
     public class HealthCheckUnitTests
     {

apis/poi/tests/UnitTests/UtilityTests.cs

@@ -0,0 +1,17 @@
+using Xunit;
+using poi.Utility;
+
+namespace UnitTests
+{
+    public class UtilityTests
+    {
+        [Fact]
+        public void TestLoggingEvents()
+        {
+            Assert.Equal(1000, LoggingEvents.Healthcheck);
+            Assert.Equal(2001, LoggingEvents.GetAllPOIs);
+            Assert.Equal(2002, LoggingEvents.GetPOIByID);
+            Assert.Equal(2002, LoggingEvents.GetPOIByTripID);
+        }
+    }
+}