adding monkeytype

backend/__tests__/__testData__/monkey-error.ts

@@ -0,0 +1,21 @@
+import { expect } from "vitest";
+import MonkeyError from "../../src/utils/error";
+import { MatcherResult } from "../vitest";
+
+export function enableMonkeyErrorExpects(): void {
+  expect.extend({
+    toMatchMonkeyError(
+      received: MonkeyError,
+      expected: MonkeyError,
+    ): MatcherResult {
+      return {
+        pass:
+          received.status === expected.status &&
+          received.message === expected.message,
+        message: () => "MonkeyError does not match:",
+        actual: { status: received.status, message: received.message },
+        expected: { status: expected.status, message: expected.message },
+      };
+    },
+  });
+}