test(repo): enforce workspace contracts

packages/sdk-playground/src/fileAdapter.test.ts

@@ -0,0 +1,49 @@
+import { afterEach, describe, expect, it, vi } from "vitest";
+import { createFileAdapter } from "./fileAdapter";
+
+afterEach(() => {
+  vi.unstubAllGlobals();
+});
+
+describe("createFileAdapter", () => {
+  it("loads the initial composition through the public SDK adapter contract", async () => {
+    const fetchMock = vi
+      .fn()
+      .mockImplementation(() => Promise.resolve(new Response("<main>demo</main>")));
+    vi.stubGlobal("fetch", fetchMock);
+
+    const { adapter, initialHtml } = await createFileAdapter();
+
+    expect(initialHtml).toBe("<main>demo</main>");
+    expect(await adapter.read("ignored.html")).toBe("<main>demo</main>");
+    expect(fetchMock).toHaveBeenCalledWith("/api/composition");
+  });
+
+  it("reports failed writes through persist:error without rejecting", async () => {
+    const fetchMock = vi
+      .fn()
+      .mockResolvedValueOnce(new Response("", { status: 404 }))
+      .mockResolvedValueOnce(new Response("failed", { status: 500 }));
+    vi.stubGlobal("fetch", fetchMock);
+    const { adapter } = await createFileAdapter();
+    const errors: string[] = [];
+    adapter.on("persist:error", (event) => errors.push(event.error.message));
+
+    await expect(adapter.write("ignored.html", "<main>updated</main>")).resolves.toBeUndefined();
+
+    expect(errors).toEqual(["Error: write failed: 500"]);
+  });
+
+  it("maps persisted versions to the SDK version shape", async () => {
+    const fetchMock = vi
+      .fn()
+      .mockResolvedValueOnce(new Response("", { status: 404 }))
+      .mockResolvedValueOnce(Response.json([{ key: "version-2", timestamp: 42 }], { status: 200 }));
+    vi.stubGlobal("fetch", fetchMock);
+    const { adapter } = await createFileAdapter();
+
+    await expect(adapter.listVersions("ignored.html")).resolves.toEqual([
+      { key: "version-2", content: "", timestamp: 42 },
+    ]);
+  });
+});