tests added for dtype comparison with fixture (#44840)

Author: ata-turhan

pandas/tests/dtypes/test_common.py

@@ -20,6 +20,7 @@
 
 import pandas as pd
 import pandas._testing as tm
+from pandas.api.types import pandas_dtype
 from pandas.arrays import SparseArray
 
 
@@ -400,6 +401,23 @@ def test_is_int64_dtype(dtype):
     assert com.is_int64_dtype(dtype)
 
 
+def test_type_comparison_with_numeric_ea_dtype(any_numeric_ea_dtype):
+    # GH#43038
+    assert pandas_dtype(any_numeric_ea_dtype) == any_numeric_ea_dtype
+
+
+def test_type_comparison_with_real_numpy_dtype(any_real_numpy_dtype):
+    # GH#43038
+    assert pandas_dtype(any_real_numpy_dtype) == any_real_numpy_dtype
+
+
+def test_type_comparison_with_signed_int_ea_dtype_and_signed_int_numpy_dtype(
+    any_signed_int_ea_dtype, any_signed_int_numpy_dtype
+):
+    # GH#43038
+    assert not pandas_dtype(any_signed_int_ea_dtype) == any_signed_int_numpy_dtype
+
+
 @pytest.mark.parametrize(
     "dtype",
     [