feat: 기능 추가 과정중

tests/unit/optimistic-layer-runtime.test.ts

@@ -0,0 +1,87 @@
+import { QueryClient } from "@tanstack/react-query";
+import { describe, expect, it } from "vitest";
+
+import { createOptimisticLayerRuntime } from "../../src/presentation/adapters/query/optimistic-layer-runtime.ts";
+import { createRuntimeIdentityRegistry } from "../../src/contracts/query-keys.ts";
+
+function scope() {
+  let current = true;
+  return {
+    snapshot: {
+      generation: 1,
+      fingerprint: "scope-token-00000001",
+      identities: createRuntimeIdentityRegistry({
+        tokenFactory: () => crypto.randomUUID(),
+      }),
+      isCurrent: () => current,
+    },
+    expire: () => {
+      current = false;
+    },
+  };
+}
+
+describe("revision-safe optimistic layer runtime", () => {
+  it("removes only the failed layer when commands settle out of order", () => {
+    const client = new QueryClient();
+    const key = ["query", "resources"];
+    client.setQueryData(key, ["base"]);
+    const selectedScope = scope();
+    const runtime = createOptimisticLayerRuntime(client);
+    const append = (previous: unknown, input: string) => [
+      ...(previous as string[]),
+      input,
+    ];
+    const first = runtime.begin(
+      key,
+      "first",
+      append,
+      selectedScope.snapshot,
+    );
+    const second = runtime.begin(
+      key,
+      "second",
+      append,
+      selectedScope.snapshot,
+    );
+    expect(client.getQueryData(key)).toEqual(["base", "first", "second"]);
+
+    second?.commit();
+    first?.rollback();
+    expect(client.getQueryData(key)).toEqual(["base", "second"]);
+  });
+
+  it("reapplies pending layers over an authoritative external cache update", () => {
+    const client = new QueryClient();
+    const key = ["query", "resources"];
+    client.setQueryData(key, ["base"]);
+    const selectedScope = scope();
+    const runtime = createOptimisticLayerRuntime(client);
+    runtime.begin(
+      key,
+      "pending",
+      (previous, input) => [...(previous as string[]), input],
+      selectedScope.snapshot,
+    );
+
+    client.setQueryData(key, ["server"]);
+    expect(client.getQueryData(key)).toEqual(["server", "pending"]);
+  });
+
+  it("removes scoped data instead of restoring it after scope expiry", () => {
+    const client = new QueryClient();
+    const key = ["query", "resources"];
+    client.setQueryData(key, ["base"]);
+    const selectedScope = scope();
+    const runtime = createOptimisticLayerRuntime(client);
+    const layer = runtime.begin(
+      key,
+      "pending",
+      (previous, input) => [...(previous as string[]), input],
+      selectedScope.snapshot,
+    );
+    selectedScope.expire();
+    layer?.rollback();
+    expect(client.getQueryData(key)).toBeUndefined();
+  });
+});