Add a few good deterministic tests

frontend/deterministic-tests/src/tests/5-concurrent-delete-during-remote-update.test.ts

@@ -0,0 +1,29 @@
+import { AssertableState } from "src/utils/assertable-state";
+import type { TestDefinition } from "../test-definition";
+
+export const concurrentDeleteDuringRemoteUpdateTest: TestDefinition = {
+    name: "Delete and remote update of same file do not crash",
+    description:
+        "One client updates a file while the other deletes it at the same " +
+        "time. Both clients should converge without errors.",
+    clients: 2,
+    steps: [
+        { type: "create", client: 0, path: "doc.md", content: "original" },
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "barrier" },
+
+        { type: "disable-sync", client: 0 },
+        { type: "disable-sync", client: 1 },
+
+        { type: "update", client: 0, path: "doc.md", content: "updated by 0" },
+        { type: "delete", client: 1, path: "doc.md" },
+
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "barrier" },
+
+        { type: "assert-consistent", verify: (state) => state.assertFileCount(0) }
+    ]
+};
+