Add tests for validation metric

Author: danlamanna

tests/test_classification.py

@@ -1,7 +1,24 @@
-from isic_challenge_scoring.classification import ClassificationScore
+import pytest
+
+from isic_challenge_scoring.classification import ClassificationScore, ValidationMetric
 
 
 def test_score(classification_truth_file_path, classification_prediction_file_path):
     assert ClassificationScore.from_file(
         classification_truth_file_path, classification_prediction_file_path
     )
+
+
+@pytest.mark.parametrize(
+    'validation_metric',
+    [ValidationMetric.AUC, ValidationMetric.BALANCED_ACCURACY, ValidationMetric.AVERAGE_PRECISION],
+)
+def test_score_validation_metric(
+    classification_truth_file_path, classification_prediction_file_path, validation_metric
+):
+    score = ClassificationScore.from_file(
+        classification_truth_file_path,
+        classification_prediction_file_path,
+        validation_metric=validation_metric,
+    )
+    assert isinstance(score.validation, float)