chore: import upstream snapshot with attribution

python/ray/data/tests/test_random_access.py

@@ -0,0 +1,65 @@
+import pyarrow
+import pytest
+
+import ray
+from ray.tests.conftest import *  # noqa
+
+
+@pytest.mark.parametrize("pandas", [False, True])
+def test_basic(ray_start_regular_shared, pandas):
+    ds = ray.data.range(100, override_num_blocks=10)
+    ds = ds.add_column("key", lambda b: b["id"] * 2)
+    ds = ds.add_column("embedding", lambda b: b["id"] ** 2)
+    if not pandas:
+        ds = ds.map_batches(
+            lambda df: pyarrow.Table.from_pandas(df), batch_format="pandas"
+        )
+
+    rad = ds.to_random_access_dataset("key", num_workers=1)
+
+    def expected(i):
+        return {"id": i, "key": i * 2, "embedding": i**2}
+
+    # Test get.
+    assert ray.get(rad.get_async(-1)) is None
+    assert ray.get(rad.get_async(200)) is None
+    for i in range(100):
+        assert ray.get(rad.get_async(i * 2 + 1)) is None
+        assert ray.get(rad.get_async(i * 2)) == expected(i)
+
+    # Test multiget.
+    results = rad.multiget([-1] + list(range(0, 20, 2)) + list(range(1, 21, 2)) + [200])
+    assert results == [None] + [expected(i) for i in range(10)] + [None] * 10 + [None]
+
+
+def test_empty_blocks(ray_start_regular_shared):
+    ds = ray.data.range(10).repartition(20)
+    assert ds._logical_plan.initial_num_blocks() == 20
+    rad = ds.to_random_access_dataset("id")
+    for i in range(10):
+        assert ray.get(rad.get_async(i)) == {"id": i}
+
+
+def test_errors(ray_start_regular_shared):
+    ds = ray.data.range(10)
+    with pytest.raises(ValueError):
+        ds.to_random_access_dataset("invalid")
+
+
+def test_stats(ray_start_regular_shared):
+    ds = ray.data.range(100, override_num_blocks=10)
+    rad = ds.to_random_access_dataset("id", num_workers=1)
+    stats = rad.stats()
+    assert "Accesses per worker: 0 min, 0 max, 0 mean" in stats, stats
+    ray.get(rad.get_async(0))
+    stats = rad.stats()
+    assert "Accesses per worker: 1 min, 1 max, 1 mean" in stats, stats
+    rad.multiget([1, 2, 3])
+    stats = rad.stats()
+    assert "Accesses per worker: 2 min, 2 max, 2 mean" in stats, stats
+
+
+if __name__ == "__main__":
+    import sys
+
+    sys.exit(pytest.main(["-v", __file__]))