Chore: homepage tests (#6278)

src/__tests__/pages/api/hash.test.js

@@ -0,0 +1,64 @@
+import { createHash } from "crypto";
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import createMockRes from "test-utils/create-mock-res";
+
+function sha256(input) {
+  return createHash("sha256").update(input).digest("hex");
+}
+
+const { readFileSync, checkAndCopyConfig, CONF_DIR } = vi.hoisted(() => ({
+  readFileSync: vi.fn(),
+  checkAndCopyConfig: vi.fn(),
+  CONF_DIR: "/conf",
+}));
+
+vi.mock("fs", () => ({
+  readFileSync,
+}));
+
+vi.mock("utils/config/config", () => ({
+  default: checkAndCopyConfig,
+  CONF_DIR,
+}));
+
+import handler from "pages/api/hash";
+
+describe("pages/api/hash", () => {
+  const originalBuildTime = process.env.HOMEPAGE_BUILDTIME;
+
+  beforeEach(() => {
+    vi.clearAllMocks();
+    process.env.HOMEPAGE_BUILDTIME = originalBuildTime;
+  });
+
+  it("returns a combined sha256 hash of known config files and build time", async () => {
+    process.env.HOMEPAGE_BUILDTIME = "build-1";
+
+    // Return deterministic contents based on file name.
+    readFileSync.mockImplementation((filePath) => {
+      const name = filePath.split("/").pop();
+      return `content:${name}`;
+    });
+
+    const req = { query: {} };
+    const res = createMockRes();
+
+    await handler(req, res);
+
+    const configs = [
+      "docker.yaml",
+      "settings.yaml",
+      "services.yaml",
+      "bookmarks.yaml",
+      "widgets.yaml",
+      "custom.css",
+      "custom.js",
+    ];
+    const hashes = configs.map((c) => sha256(`content:${c}`));
+    const expected = sha256(hashes.join("") + "build-1");
+
+    expect(checkAndCopyConfig).toHaveBeenCalled();
+    expect(res.body).toEqual({ hash: expected });
+  });
+});