def test_label_already_exists(self):
legend = Legend(items=[LegendItem(label=dict(value="foo"))])
renderer = GlyphRenderer()
bph._handle_legend_label("foo", legend, renderer)
assert len(legend.items) == 1
assert legend.items[0].label == dict(value="foo")
assert legend.items[0].renderers == [renderer]
def test_bad_arg(self, arg):
with pytest.raises(ValueError):
bph._handle_legend_label(arg, "legend", "renderer")
