code: def test_stroke_color_list_text(self):
      options = self._add_default_options(stroke_color=["red", "green"])
      symbols = symbol_layer(self.locations, **options)
      colors = [symbol.stroke_color for symbol in symbols.markers]
      assert colors == ["red", "green"]
  
imports: import unittest
  import pytest
  import numpy
  import traitlets
  from ..marker import MarkerOptions, Marker, Markers, Symbol, marker_layer, symbol_layer
label_desc: Use image node_id 8 for calling the SymbolLayer obj's underlying member method code with example usage: obj.test_stroke_color_list_text() without return types