code: def test_zmin_zmax_range_color_source():
      img = img_gray / 100.0
      fig1 = px.imshow(img, zmin=0.2, zmax=0.8, binary_string=True)
      fig2 = px.imshow(img, range_color=[0.2, 0.8], binary_string=True)
      assert fig1 == fig2
  
imports: import plotly.express
  import numpy
  import pytest
  import xarray
  from PIL import Image
  from io import BytesIO
  import base64
  import datetime
  from plotly.express.imshow_utils import rescale_intensity
label_desc: Use image node_id 11 for calling a global function with example usage: test_zmin_zmax_range_color_source() without return types