feat: add models and workspace repository layer

YKanBan.Tests/Storage/Workspace/WorkspaceSessionTests.cs

@@ -0,0 +1,60 @@
+using YKanBan.Models;
+using YKanBan.Storage;
+using YKanBan.Storage.Workspace;
+using YKanBan.Tests.TestUtilities;
+
+namespace YKanBan.Tests.Storage.Workspace;
+
+/// <summary>
+/// Tests for the workspace session lifecycle: the exclusive lock is held for
+/// the whole session and the repository is usable through it.
+/// </summary>
+[TestClass]
+public class WorkspaceSessionTests
+{
+    [TestMethod]
+    public void OpenHoldsLockUntilDisposed()
+    {
+        using var directory = new TempDirectory();
+        WorkspaceInitializer.Initialize(directory.FullPath);
+
+        using WorkspaceSession session = WorkspaceSession.Open(directory.FullPath);
+
+        // A second open while the session is alive must fail on the lock.
+        Assert.ThrowsExactly<WorkspaceLockException>(() => WorkspaceSession.Open(directory.FullPath));
+    }
+
+    [TestMethod]
+    public void DisposeReleasesLockForReopen()
+    {
+        using var directory = new TempDirectory();
+        WorkspaceInitializer.Initialize(directory.FullPath);
+
+        WorkspaceSession.Open(directory.FullPath).Dispose();
+
+        using WorkspaceSession reopened = WorkspaceSession.Open(directory.FullPath);
+        Assert.AreEqual(directory.FullPath, reopened.FolderPath);
+    }
+
+    [TestMethod]
+    public void OpenUninitializedFolderThrowsNotInitialized()
+    {
+        using var directory = new TempDirectory();
+
+        Assert.ThrowsExactly<WorkspaceNotInitializedException>(
+            () => WorkspaceSession.Open(directory.FullPath));
+    }
+
+    [TestMethod]
+    public void RepositoryIsUsableThroughSession()
+    {
+        using var directory = new TempDirectory();
+        WorkspaceInitializer.Initialize(directory.FullPath);
+
+        using WorkspaceSession session = WorkspaceSession.Open(directory.FullPath);
+        TagModel tag = session.Repository.AddTag("bug", RgbColor.Parse("#112233"), "");
+
+        Assert.AreEqual("bug", session.Repository.GetTags().Single().Name);
+        Assert.AreEqual(tag.Id, session.Repository.GetTags().Single().Id);
+    }
+}