added generation examples in tests

examples/test_examples.py

@@ -98,12 +98,12 @@ class ExamplesTests(unittest.TestCase):
 
         testargs = ["run_generation.py",
                     "--prompt=Hello",
+                    "--length=10",
                     "--seed=42"]
         model_name = "--model_name=openai-gpt"
         with patch.object(sys, 'argv', testargs + [model_name]):
             result = run_generation.main()
-            self.assertGreaterEqual(result['f1'], 30)
-            self.assertGreaterEqual(result['exact'], 30)
+            self.assertGreaterEqual(len(result), 10)
 
 if __name__ == "__main__":
     unittest.main()