diff --git a/src/types/prisma.ts b/src/types/prisma.ts
new file mode 100644
index 0000000..fbd7b48
--- /dev/null
+++ b/src/types/prisma.ts
@@ -0,0 +1,10 @@
+import prisma from "@/lib/prisma";
+
+type ThenArg<T> = T extends PromiseLike<infer U> ? U : T;
+
+export async function getTestcaseWithData() {
+  const testcases = await prisma.testcase.findMany({ include: { data: true } });
+  return testcases;
+}
+
+export type TestcaseWithData = ThenArg<ReturnType<typeof getTestcaseWithData>>;