test(backends): remove now unused supports_window_operations backend flag (ibis-project#8932)

Test case configuration now happens through pytest markers.

Author: kszucs

ibis/backends/clickhouse/tests/conftest.py

@@ -24,7 +24,6 @@
 
 class TestConf(ServiceBackendTest):
     check_dtype = False
-    supports_window_operations = False
     returned_timestamp_unit = "s"
     supported_to_timestamp_units = {"s"}
     supports_floating_modulus = False

ibis/backends/druid/tests/conftest.py

@@ -94,7 +94,6 @@ def run_query(session: Session, query: str) -> None:
 class TestConf(ServiceBackendTest):
     # druid has the same rounding behavior as postgres
     check_dtype = False
-    supports_window_operations = False
     returned_timestamp_unit = "s"
     supports_arrays = False
     supports_arrays_outside_of_select = supports_arrays

ibis/backends/exasol/tests/conftest.py

@@ -28,7 +28,6 @@ class TestConf(ServiceBackendTest):
     check_names = False
     supports_arrays = False
     supports_arrays_outside_of_select = supports_arrays
-    supports_window_operations = True
     supports_divide_by_zero = False
     returned_timestamp_unit = "us"
     supported_to_timestamp_units = {"s", "ms", "us"}

ibis/backends/mssql/tests/conftest.py

@@ -23,7 +23,6 @@
 class TestConf(ServiceBackendTest):
     # MSSQL has the same rounding behavior as postgres
     check_dtype = False
-    supports_window_operations = False
     returned_timestamp_unit = "s"
     supports_arrays_outside_of_select = supports_arrays = False
     supports_structs = False

ibis/backends/mysql/tests/conftest.py

@@ -30,7 +30,6 @@ class TestConf(ServiceBackendTest):
     rounding_method = "half_to_even"
     service_name = "mysql"
     deps = ("pymysql",)
-    supports_window_operations = True
 
     @property
     def test_files(self) -> Iterable[Path]:

ibis/backends/oracle/tests/conftest.py

@@ -34,7 +34,6 @@
 
 class TestConf(ServiceBackendTest):
     check_dtype = False
-    supports_window_operations = False
     returned_timestamp_unit = "s"
     supports_arrays = False
     supports_arrays_outside_of_select = False

ibis/backends/sqlite/tests/conftest.py

@@ -17,7 +17,6 @@
 class TestConf(BackendTest):
     supports_arrays = False
     supports_arrays_outside_of_select = supports_arrays
-    supports_window_operations = True
     check_dtype = False
     returned_timestamp_unit = "s"
     supports_structs = False

ibis/backends/tests/base.py

@@ -38,8 +38,6 @@ class BackendTest(abc.ABC):
     "Whether backend supports Arrays / Lists"
     supports_arrays_outside_of_select: bool = supports_arrays
     "Whether backend supports Arrays / Lists outside of Select Statements"
-    supports_window_operations: bool = True
-    "Whether backend supports Window Operations"
     supports_divide_by_zero: bool = False
     "Whether backend supports division by zero"
     returned_timestamp_unit: str = "us"