test: skip Ibis tests if deps aren't installed, set defaults in `Pand…

…asLikeSeries.__array__` to fix cuDF is_in (#1862)

* chore: skip ibis tests if duckdb not installed

* __array__ defaults

* simpler fix

narwhals/_pandas_like/series.py

@@ -294,6 +294,10 @@ def is_between(
 
     def is_in(self: Self, other: Any) -> PandasLikeSeries:
         ser = self._native_series
+        if isinstance(other, self.__class__):
+            # We can't use `broadcast_and_align` because we don't want to align here.
+            # `other` is just a sequence that all rows from `self` are checked against.
+            other = other._native_series
         res = ser.isin(other)
         return self._from_native_series(res)
 

tests/frame/interchange_native_namespace_test.py

@@ -28,9 +28,13 @@ def test_interchange() -> None:
 
 @pytest.mark.filterwarnings("ignore:.*The `ArrowDtype` class is not available in pandas")
 def test_ibis(
-    tmpdir: pytest.TempdirFactory,
+    tmpdir: pytest.TempdirFactory, request: pytest.FixtureRequest
 ) -> None:  # pragma: no cover
     ibis = pytest.importorskip("ibis")
+    try:
+        ibis.set_backend("duckdb")
+    except ImportError:
+        request.applymarker(pytest.mark.xfail)
     df_pl = pl.DataFrame(data)
 
     filepath = str(tmpdir / "file.parquet")  # type: ignore[operator]

tests/frame/interchange_schema_test.py

@@ -70,9 +70,13 @@ def test_interchange_schema() -> None:
 
 @pytest.mark.filterwarnings("ignore:.*locale specific date formats")
 def test_interchange_schema_ibis(
-    tmpdir: pytest.TempdirFactory,
+    tmpdir: pytest.TempdirFactory, request: pytest.FixtureRequest
 ) -> None:  # pragma: no cover
     ibis = pytest.importorskip("ibis")
+    try:
+        ibis.set_backend("duckdb")
+    except ImportError:
+        request.applymarker(pytest.mark.xfail)
     df_pl = pl.DataFrame(
         {
             "a": [1, 1, 2],

tests/frame/interchange_select_test.py

@@ -47,9 +47,13 @@ def test_interchange() -> None:
 
 
 def test_interchange_ibis(
-    tmpdir: pytest.TempdirFactory,
+    tmpdir: pytest.TempdirFactory, request: pytest.FixtureRequest
 ) -> None:  # pragma: no cover
     ibis = pytest.importorskip("ibis")
+    try:
+        ibis.set_backend("duckdb")
+    except ImportError:
+        request.applymarker(pytest.mark.xfail)
     df_pl = pl.DataFrame(data)
 
     filepath = str(tmpdir / "file.parquet")  # type: ignore[operator]

tests/frame/interchange_to_arrow_test.py

@@ -18,9 +18,13 @@ def test_interchange_to_arrow() -> None:
 
 
 def test_interchange_ibis_to_arrow(
-    tmpdir: pytest.TempdirFactory,
+    tmpdir: pytest.TempdirFactory, request: pytest.FixtureRequest
 ) -> None:  # pragma: no cover
     ibis = pytest.importorskip("ibis")
+    try:
+        ibis.set_backend("duckdb")
+    except ImportError:
+        request.applymarker(pytest.mark.xfail)
     df_pl = pl.DataFrame(data)
 
     filepath = str(tmpdir / "file.parquet")  # type: ignore[operator]

tests/frame/interchange_to_pandas_test.py

@@ -26,6 +26,10 @@ def test_interchange_ibis_to_pandas(
         request.applymarker(pytest.mark.xfail)
 
     ibis = pytest.importorskip("ibis")
+    try:
+        ibis.set_backend("duckdb")
+    except ImportError:
+        request.applymarker(pytest.mark.xfail)
     df_raw = pd.DataFrame(data)
 
     filepath = str(tmpdir / "file.parquet")  # type: ignore[operator]