def test_add_plant():
g = MTG()
vid = add_plant(g)
plant = g.node(vid)
assert plant.label == 'plant1'
vid = add_plant(g)
plant = g.node(vid)
assert plant.label == 'plant2'
vid = add_plant(g, 5)
plant = g.node(vid)
assert plant.label == 'plant5'
vid = add_plant(g)
plant = g.node(vid)
assert plant.label == 'plant6'
vid = add_plant(g, 1)
plant = g.node(vid)
assert plant.label == 'plant1'
assert len(find_plants(g)) == 4
def test_add_metamer():
g = MTG()
add_plant(g)
vid_plant, vid_axe, metamers = find_metamers(g)
assert len(metamers) == 1
vid = add_vegetative_metamer(g)
vid_plant, vid_axe, metamers = find_metamers(g)
metamer = g.node(vid)
assert len(metamers) == 2
assert metamer.label == 'metamer1'
