adds a test that runs the db seed, making sure it's compatible with l…

…atest schema (#402)

* feat: test seeds the db and asserts >0 students and users. for now this should work, might have to modify the assertions as we go.

* feat: comments

* feat: comments

* fix: comment

* fix: test name as per code review comment

* fix: adding catch block to make the failures cleaner

src/backend/db/lib/seed.test.ts

@@ -0,0 +1,28 @@
+import test from "ava";
+import { getTestDatabase } from "@/backend/tests/fixtures/get-test-database";
+import { getDb } from "@/backend/db/lib/get-db";
+import { seedfile } from "@/backend/db/lib/seed";
+
+test("seedfile works with current schema", async (t) => {
+  // note that this also seeds the database from tests/seed.ts
+  const { connectionString } = await getTestDatabase();
+  const { db } = getDb(connectionString);
+
+  try {
+    await seedfile(connectionString); // this runs our production seed file
+
+    const students = await db.selectFrom("student").selectAll().execute();
+    t.true(students.length > 0, "There should be at least one student");
+
+    const users = await db.selectFrom("user").selectAll().execute();
+    t.true(users.length > 0, "There should be at least one user");
+  } catch (error) {
+    t.fail(
+      `Seedfile execution failed: ${
+        error instanceof Error ? error.message : String(error)
+      }`
+    );
+  } finally {
+    await db.destroy();
+  }
+});