test: move empty-input tests into the existing evaluator test files

Author: otiscuilei

test/components/evaluators/test_answer_exact_match.py

@@ -71,3 +71,12 @@ def test_run_with_different_lengths():
 
     with pytest.raises(ValueError):
         evaluator.run(ground_truth_answers=["Berlin", "Paris"], predicted_answers=["Berlin"])
+
+
+def test_run_with_empty_inputs():
+    evaluator = AnswerExactMatchEvaluator()
+
+    # Empty (equal-length) inputs previously fell through the length check and
+    # crashed with a bare ZeroDivisionError when averaging over zero items.
+    with pytest.raises(ValueError, match="must be provided"):
+        evaluator.run(ground_truth_answers=[], predicted_answers=[])

test/components/evaluators/test_document_map.py

@@ -147,3 +147,12 @@ def test_run_with_different_lengths():
             ground_truth_documents=[[Document(content="Berlin")], [Document(content="Paris")]],
             retrieved_documents=[[Document(content="Berlin")]],
         )
+
+
+def test_run_with_empty_inputs():
+    evaluator = DocumentMAPEvaluator()
+
+    # Empty (equal-length) inputs previously fell through the length check and
+    # crashed with a bare ZeroDivisionError when averaging over zero items.
+    with pytest.raises(ValueError, match="must be provided"):
+        evaluator.run(ground_truth_documents=[], retrieved_documents=[])

test/components/evaluators/test_document_mrr.py

@@ -150,3 +150,12 @@ def test_run_with_different_lengths():
             ground_truth_documents=[[Document(content="Berlin")], [Document(content="Paris")]],
             retrieved_documents=[[Document(content="Berlin")]],
         )
+
+
+def test_run_with_empty_inputs():
+    evaluator = DocumentMRREvaluator()
+
+    # Empty (equal-length) inputs previously fell through the length check and
+    # crashed with a bare ZeroDivisionError when averaging over zero items.
+    with pytest.raises(ValueError, match="must be provided"):
+        evaluator.run(ground_truth_documents=[], retrieved_documents=[])

test/components/evaluators/test_document_recall.py

@@ -68,6 +68,15 @@ def test_run_with_nested_meta_comparison():
     assert result == {"individual_scores": [0.5], "score": 0.5}
 
 
+def test_run_with_empty_inputs():
+    evaluator = DocumentRecallEvaluator()
+
+    # Empty (equal-length) inputs previously fell through the length check and
+    # crashed with a bare ZeroDivisionError when averaging over zero items.
+    with pytest.raises(ValueError, match="must be provided"):
+        evaluator.run(ground_truth_documents=[], retrieved_documents=[])
+
+
 class TestDocumentRecallEvaluatorSingleHit:
     @pytest.fixture
     def evaluator(self):