Added mailboxes as local data sources (#1022)

app/Tests/Tools/IndexedDocumentIdsTests.cs

@@ -0,0 +1,34 @@
+using AIStudio.Tools.Services.Indexing;
+
+namespace AIStudio.Tests.Tools;
+
+/// <summary>
+/// Pins the ids under which documents and their chunks are stored.
+/// </summary>
+/// <remarks>
+/// Every stored chunk and every stored document row carries an id made with these formats, in the
+/// vector store as well as in the index store. Changing one would leave everything already stored
+/// under ids nothing produces any more, so these tests make that a decision somebody takes rather
+/// than something which happens while code is moved around.
+/// </remarks>
+[TestFixture]
+public sealed class IndexedDocumentIdsTests
+{
+    private const string DATA_SOURCE_ID = "6f1d6a4e-6a5e-4c62-9a4f-0f2d2c8b7a11";
+
+    [Test]
+    public void TheChunkIdOfAKnownChunkIsPinned()
+    {
+        Assert.Multiple(() =>
+        {
+            Assert.That(IndexedDocumentIds.CreateChunkId(DATA_SOURCE_ID, "3F9A0C", 0), Is.EqualTo("7c9d2822-f9d1-a94e-8d83-30cea4f0856f"));
+            Assert.That(IndexedDocumentIds.CreateChunkId(DATA_SOURCE_ID, "3F9A0C", 1), Is.EqualTo("5830c96c-7c3c-2f47-8d54-6eadf04cddf3"), "Each chunk of a document has an id of its own.");
+        });
+    }
+
+    [Test]
+    public void TheParentIdOfAKnownDocumentIsPinned()
+    {
+        Assert.That(IndexedDocumentIds.CreateParentId(DATA_SOURCE_ID, "/tmp/test-data/report.pdf"), Is.EqualTo("d06c4351-2e57-2941-aa4c-d7a814bfa418"));
+    }
+}