Upload tests/test_eval.py with huggingface_hub

tests/test_eval.py

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+import pytest
+import numpy as np
+from mlplo.eval import maybe_limit_split
+
+def test_maybe_limit_split():
+    class DummyDataset:
+        def __init__(self, size):
+            self.size = size
+        def __len__(self):
+            return self.size
+        def select(self, indices):
+            return list(indices)
+            
+    ds = DummyDataset(10)
+    assert maybe_limit_split(ds, None) == ds
+    assert maybe_limit_split(ds, 15) == ds
+    assert maybe_limit_split(ds, 5) == list(range(5))