Add __mul__ and __rmul__ overrides to PaginationList

Same C-level truncation issue as __add__ — list.__mul__ reads ob_item
directly and silently only repeats already-fetched pages. Each override
calls _fetch_all() first, then delegates to list.__mul__. Added 4 tests
(single-page and multi-page for each).

Author: stark256-spec

pyiceberg/typedef.py

@@ -345,3 +345,13 @@ def __radd__(self, other: list[T]) -> list[T]:
         """Return other + self as a plain list, fetching all pages first."""
         self._fetch_all()
         return list.__add__(other, self)
+
+    def __mul__(self, n: SupportsIndex) -> list[T]:
+        """Return self * n as a plain list, fetching all pages first."""
+        self._fetch_all()
+        return list.__mul__(self, n)
+
+    def __rmul__(self, n: SupportsIndex) -> list[T]:
+        """Return n * self as a plain list, fetching all pages first."""
+        self._fetch_all()
+        return list.__mul__(self, n)

tests/utils/test_pagination.py

@@ -111,6 +111,16 @@ def test_single_page_radd() -> None:
     assert [1] + pl == [1, 2, 3]
 
 
+def test_single_page_mul() -> None:
+    pl, _ = _simple_pagination_list([[1, 2]])
+    assert pl * 2 == [1, 2, 1, 2]
+
+
+def test_single_page_rmul() -> None:
+    pl, _ = _simple_pagination_list([[1, 2]])
+    assert 2 * pl == [1, 2, 1, 2]
+
+
 # ---------------------------------------------------------------------------
 # Multi-page: lazily fetches subsequent pages
 # ---------------------------------------------------------------------------
@@ -250,6 +260,16 @@ def test_multi_page_radd_fetches_all() -> None:
     assert [0] + pl == [0] + expected
 
 
+def test_multi_page_mul_fetches_all() -> None:
+    pl, expected = _simple_pagination_list([[1, 2], [3, 4]])
+    assert pl * 2 == expected * 2
+
+
+def test_multi_page_rmul_fetches_all() -> None:
+    pl, expected = _simple_pagination_list([[1, 2], [3, 4]])
+    assert 2 * pl == 2 * expected
+
+
 # ---------------------------------------------------------------------------
 # Performance: len() should not eagerly fetch all pages for a single-page list
 # ---------------------------------------------------------------------------