Created Windows Service

FabApprovalWorkerServiceTests/TrainingServiceTests.cs

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+using FabApprovalWorkerService.Services;
+
+using Microsoft.Extensions.Logging;
+
+using Moq;
+
+namespace FabApprovalWorkerServiceTests;
+public class TrainingServiceTests {
+    private Mock<ILogger<TrainingService>> _mockLogger;
+    private Mock<IDalService> _mockDalService;
+
+    private TrainingService _trainingService;
+
+    [SetUp]
+    public void Setup() {
+        _mockLogger = new Mock<ILogger<TrainingService>>();
+        _mockDalService = new Mock<IDalService>();
+    }
+
+    [Test]
+    public void TrainingServiceWithNullLoggerShouldThrowException() {
+        Assert.Throws<ArgumentNullException>(() => new TrainingService(null, _mockDalService.Object));
+    }
+
+    [Test]
+    public void TrainingServiceWithNullDalServiceShouldThrowException() {
+        Assert.Throws<ArgumentNullException>(() => new TrainingService(_mockLogger.Object, null));
+    }
+}