Missing test coverage

Author: stevebux

lambdas/api-handler/src/services/__tests__/letter-operations.test.ts

@@ -80,6 +80,15 @@ describe("getLetterById", () => {
     await expect(getLetterById('supplierid', 'letter1', mockRepo as any)).rejects.toThrow('No resource found with that ID');
   });
 
+    it('should throw unexpected error', async () => {
+
+    const mockRepo = {
+      getLetterById: jest.fn().mockRejectedValue(new Error('unexpected error'))
+    };
+
+    await expect(getLetterById('supplierid', 'letter1', mockRepo as any)).rejects.toThrow("unexpected error");
+  });
+
 });
 
 describe('patchLetterStatus function', () => {