def test_undo():
l = init()
u = []
ui_insert(l, u, "2", "300", "food")
ui_undo(l, u)
assert create_expense("2", "300", "food") not in l
def test_filter():
l = init()
le = len(l)
filter_others(l, "food")
assert len(l) <= le
for x in l:
assert "food" in x
def test_sort():
l = init()
d = sort_day(l)
for i in range(len(d) - 1):
assert d[i][1] >= d[i + 1][1]
d = sort_category(l, "food")
for i in range(len(d) - 1):
assert d[i][1] >= d[i + 1][1]
def test_remove_expense():
l = init()
length = len(l)
u = []
ui_remove(l, u, "food")
for x in l:
assert "food" not in x
assert length >= len(l)
l = init()
length = len(l)
ui_remove(l, u, "3", "15")
for x in l:
assert int(x[0]) < 3 or int(x[0]) > 15
assert length >= len(l)
l = init()
length = len(l)
ui_remove(l, u, "2")
for x in l:
assert "2" not in x
assert length >= len(l)
def test_add_exepnse():
l = init()
lenght = len(l)
obj = create_expense("30", 200, "drinks")
add_expense(l, obj)
assert (lenght + 1) == len(l)
assert obj in l
obj = create_expense("1", 300, "batteries")
lenght = len(l)
add_expense(l, obj)
assert lenght + 1 == len(l)
assert (obj in l)
assert int(l[l.index(obj) + 1][0]) \
> int(l[l.index(obj)][0]) # Obj should be affter last expense in day 1
def test_sum_category():
l = init()
assert sum_of_category(
l, "fun") == 0 # if there is no such category, the sum must be 0