Update packages/firestore/test/lite/integration.test.ts

Co-authored-by: gemini-code-assist[bot] <176961590+gemini-code-assist[bot]@users.noreply.github.com>

Author: cherylEnkidu

packages/firestore/test/lite/integration.test.ts

@@ -286,7 +286,7 @@ describe('doc', () => {
   it('validates path', () => {
     return withTestDb(db => {
       expect(() => doc(undefined as any, 'coll/doc')).to.throw(
-        'Function doc() cannot be called with an empty first argument.'
+        'Function doc() cannot be called with an undefined first argument.'
       );
       expect(() => doc({} as any, 'coll/doc')).to.throw(
         'Expected first argument to doc() to be a CollectionReference, a DocumentReference or FirebaseFirestore'