def test_area_stacking():
area1 = AreaGlyph(x=[1, 2, 3, 4, 5], y=[2, 9, 2, 5, 10])
area2 = AreaGlyph(x=[1, 2, 3, 4, 5], y=[1, 1, 1, 1, 1])
stack(area1, area2)
area2_stacked_values = [0, 3, 10, 3, 6, 11, 0, 0, 10, 5, 2, 9, 2, 0]
comparison = pd.Series(area2_stacked_values) - pd.Series(
area2.df['y_values'].values[0])
assert comparison.sum() == 0
def test_area_base_values(test_data):
"""Test creating chart data source from array-like list data."""
x = pd.Series(test_data.array_data[0])
y = pd.Series(test_data.array_data[1])
ag = AreaGlyph(x=x, y=y)
assert ag.source.data['y_values'][0][0] == 0
assert ag.source.data['y_values'][0][-1] == 0