def test_draws_object():
dummy = mock.Mock()
canvas = Canvas(gl=dummy)
label = mock.Mock()
label.draw = mock.MagicMock()
canvas.objects['label'] = label
canvas.window.on_draw()
assert label.draw.called
def test_draw_line():
mock_gl = mock.Mock()
canvas = Canvas(gl=mock_gl)
canvas.draw_line()
assert len(canvas.objects) > 0
def test_label():
mock_gl = mock.Mock()
canvas = Canvas(gl=mock_gl)
canvas.draw_label('Cool!')
assert canvas.objects['Cool!']