Restore named project snapshots

tests/project-snapshot.repository.test.ts

@@ -242,4 +242,41 @@ describe("project snapshot repository", () => {
       context.close();
     }
   });
+
+  it("verifies stored payload integrity before preparing a restore", () => {
+    const context = createTestDatabase();
+    try {
+      const repository = new ProjectSnapshotRepository(context.db);
+      const snapshot = repository.createNamed({
+        projectId: "project-1",
+        expectedRevision: 0,
+        name: "Freigabe",
+      });
+      assert.ok(snapshot);
+      const prepared = repository.prepareRestore(
+        "project-1",
+        snapshot.id
+      );
+      assert.ok(prepared);
+      assert.equal(
+        prepared.command.payload.targetState.project.id,
+        "project-1"
+      );
+      context.db
+        .update(projectSnapshots)
+        .set({ payloadJson: `${JSON.stringify({})}\n` })
+        .where(eq(projectSnapshots.id, snapshot.id))
+        .run();
+      assert.throws(
+        () => repository.prepareRestore("project-1", snapshot.id),
+        /checksum verification failed/
+      );
+      assert.equal(
+        repository.prepareRestore("project-1", "missing"),
+        null
+      );
+    } finally {
+      context.close();
+    }
+  });
 });