code: def test_concat_empty_series_dtype_category_with_array(self):
      # GH#18515
      assert (
          concat(
              [
                  Series(np.array([]), dtype="category"),
                  Series(dtype="float64"),
              ]
          ).dtype
          == "float64"
      )
  
imports: import numpy
  import pytest
  import pandas
  from pandas import DataFrame, RangeIndex, Series, concat, date_range
  import pandas._testing
label_desc: Use image node_id 8 for calling the TestEmptyConcat obj's underlying member method code with example usage: obj.test_concat_empty_series_dtype_category_with_array() without return types