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Update ellens-alien-game test to prevent returning an empty list from the factory #4001

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Update ellens-alien-game test to prevent returning an empty list from the factory #4001

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3 changes: 3 additions & 0 deletions exercises/concept/ellens-alien-game/classes_test.py
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Original file line number Diff line number Diff line change
Expand Up @@ -199,6 +199,9 @@ def test_new_aliens_collection(self):
test_data = [(-2, 6), (1, 5), (-4, -3)]
actual_result = new_aliens_collection(test_data)

length_error_message = f"Expected {len(test_data)} Aliens, got {len(actual_result)}"
self.assertEqual(len(actual_result), len(test_data), msg=length_error_message)

error_message = "new_aliens_collection() must return a list of Alien objects."

for obj in actual_result:
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