done

tests/integration/migrations.test.ts

@@ -0,0 +1,44 @@
+import { execSync } from "child_process";
+
+const DIRECT_DB = process.env.DIRECT_DATABASE_URL || process.env.DATABASE_URL;
+
+function runPrisma(cmd: string) {
+  const env = { ...process.env } as NodeJS.ProcessEnv;
+  if (DIRECT_DB) {
+    env.DIRECT_DATABASE_URL = DIRECT_DB;
+    env.DATABASE_URL = DIRECT_DB;
+  }
+  return execSync(`npx prisma ${cmd}`, { env, encoding: "utf8" }).toString();
+}
+
+describe("Migrations idempotency", () => {
+  if (!DIRECT_DB) {
+    test.skip("DIRECT_DATABASE_URL not set - skipping migration idempotency test", () => {});
+    return;
+  }
+
+  test(
+    "apply -> reset -> apply yields stable migration checksums",
+    () => {
+      jest.setTimeout(5 * 60 * 1000);
+
+      // Apply all migrations (up)
+      runPrisma("migrate deploy");
+
+      // Capture migration checksums from the migrations table
+      const first = runPrisma(
+        `db execute --command "SELECT migration_name, checksum FROM _prisma_migrations ORDER BY migration_name;" --url \"${DIRECT_DB}\"`
+      ).trim();
+
+      // Reset will drop the DB and reapply migrations (down then up)
+      runPrisma("migrate reset --force --skip-seed");
+
+      // Re-capture checksums after running reset
+      const second = runPrisma(
+        `db execute --command "SELECT migration_name, checksum FROM _prisma_migrations ORDER BY migration_name;" --url \"${DIRECT_DB}\"`
+      ).trim();
+
+      expect(first).toBe(second);
+    },
+  );
+});