test: cover index page generation (#468)

Author: chrisns

.github/workflows/ci.yaml

@@ -24,6 +24,7 @@ jobs:
           node-version-file: ".nvmrc"
       - run: npm install
       - run: npm run lint
+      - run: npm test
 
   indexpage:
     name: Index Page

__tests__/generate_index.test.js

@@ -0,0 +1,29 @@
+import { execFileSync } from "child_process";
+import fs from "fs";
+import os from "os";
+import path from "path";
+import { fileURLToPath } from "url";
+
+const script = fileURLToPath(new URL("../generate_index.js", import.meta.url));
+
+test("index generation includes headings", () => {
+  const tmp = fs.mkdtempSync(path.join(os.tmpdir(), "talks-test-"));
+  fs.writeFileSync(
+    path.join(tmp, "schedule.md"),
+    `| Date | Talk | Where |
+| --- | --- | --- |
+| 2099-01-01 | The Future | (v)[Future](https://example.com) |
+| 2000-01-01 | The Past | (v)[Past](https://example.com) |
+`,
+  );
+  fs.writeFileSync(
+    path.join(tmp, "demo.md"),
+    "title: Demo Talk\ndescription: Something\n",
+  );
+  const output = execFileSync("node", [script], {
+    cwd: tmp,
+  });
+  const html = output.toString();
+  expect(html).toContain("Upcoming talks");
+  expect(html).toContain("Previous talks");
+});