persist task (red-green)

TaskSample/Task/Task.Tests.cs

@@ -17,4 +17,22 @@ public void Create_Returns_TimecardIdentifier()
         Task task = new Task();
         Assert.That(task.Id, Is.Not.EqualTo(Guid.Empty));
     }
+
+    [Test]
+    public void Given_TaskId_That_DoesNotExist_When_Getting_Task_Then_Returns_Null()
+    {
+        Task task = Task.Get(Guid.NewGuid());
+        Assert.That(task, Is.Null);
+    }
+
+    [Test]
+    public void Creating_Task_Get_Task_WithSameIdReturnsTaskWithMatchingTitle()
+    {
+        string expectedTitle = "My Task Title";
+
+        Task task = new Task(expectedTitle);
+        Task task2 = Task.Get(task.Id);
+
+        Assert.That(task2.Title, Is.EqualTo(expectedTitle));
+    }
 }

TaskSample/Task/Task.cs

@@ -1,11 +1,20 @@
 namespace TaskSample.Task;
+
 public class Task
 {
+    internal static List<Task> Storage { get; set; } = new List<Task>();
+
     public string Title { get; set; }
     public Guid Id { get; set; } = Guid.NewGuid();
 
     public Task(string title = "")
     {
         this.Title = title;
+        Task.Storage.Add(this);
+    }
+
+    internal static Task Get(Guid guid)
+    {
+        return Task.Storage.FirstOrDefault(t => t.Id == guid);
     }
 }