CI: Run excel tests on single cpu for windows (pandas-dev#57486)

* CI: Run excel tests on single cpu for windows

* Update

Author: phofl

pandas/tests/io/excel/test_odf.py

@@ -3,11 +3,16 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_windows
+
 import pandas as pd
 import pandas._testing as tm
 
 pytest.importorskip("odf")
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 @pytest.fixture(autouse=True)
 def cd_and_set_engine(monkeypatch, datapath):

pandas/tests/io/excel/test_odswriter.py

@@ -6,13 +6,18 @@
 
 import pytest
 
+from pandas.compat import is_platform_windows
+
 import pandas as pd
 import pandas._testing as tm
 
 from pandas.io.excel import ExcelWriter
 
 odf = pytest.importorskip("odf")
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 @pytest.fixture
 def ext():

pandas/tests/io/excel/test_openpyxl.py

@@ -5,6 +5,8 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_windows
+
 import pandas as pd
 from pandas import DataFrame
 import pandas._testing as tm
@@ -17,6 +19,9 @@
 
 openpyxl = pytest.importorskip("openpyxl")
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 @pytest.fixture
 def ext():

pandas/tests/io/excel/test_readers.py

@@ -18,6 +18,7 @@
 
 from pandas._config import using_pyarrow_string_dtype
 
+from pandas.compat import is_platform_windows
 import pandas.util._test_decorators as td
 
 import pandas as pd
@@ -34,6 +35,9 @@
     StringArray,
 )
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 read_ext_params = [".xls", ".xlsx", ".xlsm", ".xlsb", ".ods"]
 engine_params = [
     # Add any engines to test here

pandas/tests/io/excel/test_style.py

@@ -4,6 +4,7 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_windows
 import pandas.util._test_decorators as td
 
 from pandas import (
@@ -20,6 +21,9 @@
 # could compute styles and render to excel without jinja2, since there is no
 # 'template' file, but this needs the import error to delayed until render time.
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 def assert_equal_cell_styles(cell1, cell2):
     # TODO: should find a better way to check equality

pandas/tests/io/excel/test_writers.py

@@ -11,6 +11,7 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_windows
 from pandas.compat._constants import PY310
 from pandas.compat._optional import import_optional_dependency
 import pandas.util._test_decorators as td
@@ -34,6 +35,9 @@
 )
 from pandas.io.excel._util import _writers
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 def get_exp_unit(path: str) -> str:
     return "ns"

pandas/tests/io/excel/test_xlrd.py

@@ -3,6 +3,8 @@
 import numpy as np
 import pytest
 
+from pandas.compat import is_platform_windows
+
 import pandas as pd
 import pandas._testing as tm
 
@@ -11,6 +13,9 @@
 
 xlrd = pytest.importorskip("xlrd")
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 @pytest.fixture
 def read_ext_xlrd():

pandas/tests/io/excel/test_xlsxwriter.py

@@ -2,13 +2,18 @@
 
 import pytest
 
+from pandas.compat import is_platform_windows
+
 from pandas import DataFrame
 import pandas._testing as tm
 
 from pandas.io.excel import ExcelWriter
 
 xlsxwriter = pytest.importorskip("xlsxwriter")
 
+if is_platform_windows():
+    pytestmark = pytest.mark.single_cpu
+
 
 @pytest.fixture
 def ext():