old_contents: import pytest
  
  
  @pytest.fixture
  def pyglui_ui_instance():
      import glfw
  
      from pyglui import cygl, ui
  
      glfw.ERROR_REPORTING = "raise"
      glfw_init_successful = glfw.init()
      assert glfw_init_successful, "Failed to initialize GLFW"
      glfw.window_hint(glfw.VISIBLE, glfw.FALSE)
      try:
          window = glfw.create_window(200, 200, "Test window", None, None)
      except glfw.GLFWError as err:
          # Skip if CI does not allow creating a window, e.g. on macOS:
          # > NSGL: Failed to find a suitable pixel format
          glfw.terminate()
          pytest.skip(str(err))
  
      glfw.make_context_current(window)  # required for GLEW init
      cygl.utils.init()
      global_ui_instance = ui.UI()
      yield global_ui_instance
      global_ui_instance.terminate()
      glfw.destroy_window(window)
      glfw.terminate()
  
  
  @pytest.fixture
  def attribute_context():
      return {"test": 5}
  
  
  def test_Color_Legend(pyglui_ui_instance, attribute_context):
      import pyglui.ui
  
      black = (0.0, 0.0, 0.0, 1.0)
      pyglui.ui.Color_Legend(black, "test color")
  
new_contents: import pytest
  
  
  @pytest.fixture
  def pyglui_ui_instance():
      import glfw
  
      from pyglui import cygl, ui
  
      glfw.ERROR_REPORTING = "raise"
      try:
          glfw_init_successful = glfw.init()
          assert glfw_init_successful, "Failed to initialize GLFW"
          glfw.window_hint(glfw.VISIBLE, glfw.FALSE)
          window = glfw.create_window(200, 200, "Test window", None, None)
      except glfw.GLFWError as err:
          # Skip if CI does not allow creating a window, e.g. on macOS:
          # > NSGL: Failed to find a suitable pixel format
          glfw.terminate()
          pytest.skip(str(err))
  
      glfw.make_context_current(window)  # required for GLEW init
      cygl.utils.init()
      global_ui_instance = ui.UI()
      yield global_ui_instance
      global_ui_instance.terminate()
      glfw.destroy_window(window)
      glfw.terminate()
  
  
  @pytest.fixture
  def attribute_context():
      return {"test": 5}
  
  
  def test_Color_Legend(pyglui_ui_instance, attribute_context):
      import pyglui.ui
  
      black = (0.0, 0.0, 0.0, 1.0)
      pyglui.ui.Color_Legend(black, "test color")
  
subject: Allow glfw.init() to fail on CI as well