Merge pull request #5 from osakunta/cms-hook-tests

add vitest and basic tests

hooks/useCMS.test.ts

@@ -0,0 +1,36 @@
+import { expect, test, vi } from "vitest";
+import useCMS from "./useCMS";
+import { renderHook } from "@testing-library/react";
+
+test("calls fetch", () => {
+  const fetchMock = vi.spyOn(global, "fetch");
+
+  renderHook(() => useCMS({ collection: "text" }));
+
+  expect(fetchMock).toHaveBeenCalled();
+});
+
+test("does not call fetch on rerender", () => {
+  const fetchMock = vi.spyOn(global, "fetch");
+
+  const { rerender } = renderHook(() => useCMS({ collection: "text" }));
+  rerender();
+
+  expect(fetchMock).toHaveBeenCalledTimes(1);
+});
+
+test.skip("calls fetch once for the same collection", () => {
+  const fetchMock = vi.spyOn(global, "fetch");
+
+  renderHook(() => useCMS({ collection: "text" }));
+  renderHook(() => useCMS({ collection: "text" }));
+  expect(fetchMock).toHaveBeenCalledTimes(1);
+});
+
+test("calls fetch once per collection", () => {
+  const fetchMock = vi.spyOn(global, "fetch");
+
+  renderHook(() => useCMS({ collection: "text" }));
+  renderHook(() => useCMS({ collection: "image" }));
+  expect(fetchMock).toHaveBeenCalledTimes(2);
+});