def test_dial_none(document, comm):
dial = Dial(value=None, name='Value')
model = dial.get_root(document, comm)
cds = model.select(name='annulus_source')
assert list(cds.data['starts']) == [9.861110273767961, 9.861110273767961]
assert list(cds.data['ends']) == [9.861110273767961, 5.846852994181004]
text_cds = model.select(name='label_source')
assert text_cds.data['text'] == ['Value', '-%', '0%', '100%']
dial.nan_format = 'nan'
assert text_cds.data['text'] == ['Value', 'nan%', '0%', '100%']
def test_dial_thresholds(document, comm):
dial = Dial(value=0,
colors=[(0.33, 'green'), (0.66, 'yellow'), (1, 'red')])
model = dial.get_root(document, comm)
cds = model.select(name='annulus_source')
assert ['green', 'whitesmoke'] == cds.data['color']
dial.value = 50
assert ['yellow', 'whitesmoke'] == cds.data['color']
dial.value = 72
assert ['red', 'whitesmoke'] == cds.data['color']
def test_dial_bounds():
dial = Dial(bounds=(0, 20))
with pytest.raises(ValueError):
dial.value = 100