Add pathlib.Path and empty batch tests for Arrow IPC and register_batch

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: timsaucer

python/tests/test_context.py

@@ -680,6 +680,11 @@ def test_read_arrow(ctx, tmp_path):
     assert result[0].column(0) == pa.array([1, 2, 3])
     assert result[0].column(1) == pa.array(["x", "y", "z"])
 
+    # Also verify pathlib.Path works
+    df = ctx.read_arrow(arrow_path)
+    result = df.collect()
+    assert result[0].column(0) == pa.array([1, 2, 3])
+
 
 def test_read_empty(ctx):
     df = ctx.read_empty()
@@ -698,6 +703,11 @@ def test_register_arrow(ctx, tmp_path):
     result = ctx.sql("SELECT * FROM arrow_tbl").collect()
     assert result[0].column(0) == pa.array([10, 20, 30])
 
+    # Also verify pathlib.Path works
+    ctx.register_arrow("arrow_tbl_path", arrow_path)
+    result = ctx.sql("SELECT * FROM arrow_tbl_path").collect()
+    assert result[0].column(0) == pa.array([10, 20, 30])
+
 
 def test_register_batch(ctx):
     batch = pa.RecordBatch.from_pydict({"a": [1, 2, 3], "b": [4, 5, 6]})
@@ -707,6 +717,13 @@ def test_register_batch(ctx):
     assert result[0].column(1) == pa.array([4, 5, 6])
 
 
+def test_register_batch_empty(ctx):
+    batch = pa.RecordBatch.from_pydict({"a": pa.array([], type=pa.int64())})
+    ctx.register_batch("empty_batch_tbl", batch)
+    result = ctx.sql("SELECT * FROM empty_batch_tbl").collect()
+    assert result[0].num_rows == 0
+
+
 def test_create_sql_options():
     SQLOptions()