code: def test_dodge_preserve_single_text():
      data1 = pd.DataFrame(
          {"x": ["a", "b", "b", "b"], "y": ["a", "a", "b", "b"]}
      )
  
      d = position_dodge(preserve="single", width=0.9)
      p = (
          ggplot(data1, aes("x", fill="y"))
          + geom_bar(position=d)
          + geom_text(
              aes(y=after_stat("count"), label=after_stat("count")),
              stat="count",
              position=d,
              va="bottom",
          )
      )
      assert p == "dodge_preserve_single_text"
  
imports: import string
  import numpy
  import pandas
  import pytest
  from plotnine import aes, after_stat, geom_bar, geom_boxplot, geom_col, geom_jitter, geom_point, geom_rect, geom_segment, geom_text, ggplot, position_dodge, position_dodge2, position_jitter, position_jitterdodge, position_nudge, position_stack, scale_y_log10, stage
  from plotnine.exceptions import PlotnineError
  from plotnine.positions.position import position
label_desc: Use image node_id 9 for calling a global function with example usage: test_dodge_preserve_single_text() without return types