def test_Band():
band = Band()
assert band.plot is None
assert band.level == 'annotation'
assert band.lower is None
assert band.lower_units == 'data'
assert band.upper is None
assert band.upper_units == 'data'
assert band.base is None
assert band.dimension == 'height'
assert isinstance(band.source, ColumnDataSource)
assert band.x_range_name == 'default'
assert band.y_range_name == 'default'
check_line_properties(band, "", "#cccccc", 1.0, 0.3)
check_fill_properties(band, "", "#fff9ba", 0.4)
check_properties_existence(band, [
"plot",
"visible",
"level",
"lower",
"lower_units",
"upper",
"upper_units",
"base",
"base_units",
"dimension",
"source",
"x_range_name",
"y_range_name",
], LINE, FILL)
def test_Whisker_and_Band_accept_negative_values():
whisker = Whisker(base=-1., lower=-1.5, upper=-0.5)
assert whisker.base == -1.
assert whisker.lower == -1.5
assert whisker.upper == -0.5
band = Band(base=-1., lower=-1.5, upper=-0.5)
assert band.base == -1.
assert band.lower == -1.5
assert band.upper == -0.5
