Describe snapshot source revisions

tests/project-version-history.test.ts

@@ -5,7 +5,10 @@ import { renderToStaticMarkup } from "react-dom/server";
 import { ProjectVersionHistory } from "../src/frontend/components/project-version-history.js";
 import { ProjectDeviceModal } from "../src/frontend/components/project-device-modal.js";
 import { ProjectSettingsModal } from "../src/frontend/components/project-settings-modal.js";
-import type { ProjectRevisionSummaryDto } from "../src/frontend/types.js";
+import type {
+  ProjectRevisionSummaryDto,
+  ProjectSnapshotMetadataDto,
+} from "../src/frontend/types.js";
 import {
   createNamedProjectSnapshot,
   getProjectHistory,
@@ -19,6 +22,7 @@ import {
   getProjectRevisionDescription,
   getProjectRevisionSourceLabel,
   getProjectSnapshotKindLabel,
+  getProjectSnapshotRevisionDescription,
   mergeProjectRevisionPages,
 } from "../src/frontend/utils/project-version-history.js";
 
@@ -40,6 +44,25 @@ function revision(
   };
 }
 
+function snapshot(
+  sourceRevision: number,
+  sourceRevisionMetadata: ProjectRevisionSummaryDto | null
+): ProjectSnapshotMetadataDto {
+  return {
+    id: `snapshot-${sourceRevision}`,
+    projectId: "project-1",
+    sourceRevision,
+    sourceRevisionMetadata,
+    schemaVersion: 5,
+    kind: "automatic",
+    name: `Revision ${sourceRevision}`,
+    description: null,
+    payloadSha256: "checksum",
+    createdAtIso: "2026-07-25T12:00:00.000Z",
+    createdByActorId: null,
+  };
+}
+
 describe("project version history presentation", () => {
   it("renders a compact collapsed German entry point", () => {
     const markup = renderToStaticMarkup(
@@ -82,6 +105,16 @@ describe("project version history presentation", () => {
       ),
       "future.command"
     );
+    assert.equal(
+      getProjectRevisionDescription(
+        revision(4, {
+          source: "undo",
+          description: "Undo project.update-settings",
+          commandType: "project.update-settings",
+        })
+      ),
+      "Projekteinstellungen bearbeitet"
+    );
     assert.equal(getProjectSnapshotKindLabel("named"), "Benannt");
     assert.equal(
       getProjectSnapshotKindLabel("automatic"),
@@ -98,6 +131,28 @@ describe("project version history presentation", () => {
       [5, 4, 3]
     );
   });
+
+  it("describes the immutable source revision of a snapshot", () => {
+    assert.equal(
+      getProjectSnapshotRevisionDescription(
+        snapshot(
+          25,
+          revision(25, {
+            description: "Verteilung UV-01 angelegt",
+          })
+        )
+      ),
+      "Bearbeitung: Verteilung UV-01 angelegt"
+    );
+    assert.equal(
+      getProjectSnapshotRevisionDescription(snapshot(0, null)),
+      "Projektstart"
+    );
+    assert.equal(
+      getProjectSnapshotRevisionDescription(snapshot(25, null)),
+      "Änderungsdetails nicht verfügbar"
+    );
+  });
 });
 
 describe("project settings presentation", () => {