Commit LLM generated test cases

frontend/deterministic-tests/src/tests/offline-multiple-edits.test.ts

@@ -0,0 +1,72 @@
+import type { ClientState, TestDefinition } from "../test-definition";
+import { assert } from "../utils/assert";
+
+function verifyOnlyLatestVersion(state: ClientState): void {
+    assert(
+        state.files.size === 1,
+        `Expected 1 file, got ${state.files.size}: ${Array.from(state.files.keys()).join(", ")}`
+    );
+    assert(
+        state.files.has("doc.md"),
+        `Expected doc.md to exist, got: ${Array.from(state.files.keys()).join(", ")}`
+    );
+    const content = state.files.get("doc.md") ?? "";
+    assert(
+        content === "edit-5-final",
+        `Expected doc.md to have "edit-5-final" (latest edit), got: "${content}"`
+    );
+}
+
+export const offlineMultipleEditsTest: TestDefinition = {
+    name: "Offline Multiple Edits Converge to Latest",
+    description:
+        "Client 0 creates a file and syncs. Client 0 goes offline, edits the file " +
+        "5 times with different content. When Client 0 reconnects, both clients " +
+        "must converge to the final version.",
+    clients: 2,
+    steps: [
+        // Setup: create file and sync to both clients
+        { type: "create", client: 0, path: "doc.md", content: "original" },
+        { type: "enable-sync", client: 0 },
+        { type: "enable-sync", client: 1 },
+        { type: "sync" },
+        { type: "barrier" },
+        {
+            type: "assert-content",
+            client: 1,
+            path: "doc.md",
+            content: "original"
+        },
+
+        // Client 0 goes offline
+        { type: "disable-sync", client: 0 },
+
+        // Client 0 makes 5 sequential edits while offline
+        { type: "update", client: 0, path: "doc.md", content: "edit-1" },
+        { type: "update", client: 0, path: "doc.md", content: "edit-2" },
+        { type: "update", client: 0, path: "doc.md", content: "edit-3" },
+        { type: "update", client: 0, path: "doc.md", content: "edit-4" },
+        { type: "update", client: 0, path: "doc.md", content: "edit-5-final" },
+
+        // Client 0 reconnects -- offline reconciliation should detect the
+        // changed hash and sync the current on-disk content (edit-5-final)
+        { type: "enable-sync", client: 0 },
+        { type: "sync" },
+        { type: "barrier" },
+
+        // Both clients should have the final version
+        {
+            type: "assert-content",
+            client: 0,
+            path: "doc.md",
+            content: "edit-5-final"
+        },
+        {
+            type: "assert-content",
+            client: 1,
+            path: "doc.md",
+            content: "edit-5-final"
+        },
+        { type: "assert-consistent", verify: verifyOnlyLatestVersion }
+    ]
+};