def test_comprehension_filter_cast_assumptions():
assert isinstance(
c.generator_comp(c.this).filter(c.this).execute(range(10)),
GeneratorType,
)
assert isinstance(
c.generator_comp(c.this).filter(c.this, cast=None).execute(range(10)),
GeneratorType,
)
assert (c.list_comp(c.this).filter(c.this).execute(range(3))) == [
1,
2,
]
def f(x):
f.number_of_calls += 1
if f.number_of_calls > f.max_number_of_calls:
raise ValueError
return bool(x)
f.max_number_of_calls = 2
f.number_of_calls = 0
assert (c.set_comp(c.this).filter(c.call_func(f,
c.this)).execute([0, 0,
1])) == {
1,
}
assert (c.set_comp(c.this).filter(c.this, cast=list).execute([0, 0,
1])) == [
1,
]
assert (c.set_comp(c.this).filter(c.this).execute(range(3))) == {
1,
2,
}
assert (c.tuple_comp(c.this).filter(c.this).execute(range(3))) == (
1,
2,
)
assert (c.tuple_comp(c.this).filter(c.this, list).execute(range(3))) == [
1,
2,
]
assert (c.dict_comp(c.this,
c.this).filter(c.item(0)).execute(range(3))) == {
1: 1,
2: 2,
}
assert (c.dict_comp(c.this, c.this).filter(c.item(0),
dict).execute(range(3))) == {
1: 1,
2: 2,
}
def test_tuple_comprehension():
assert c.tuple_comp(1).gen_converter()(range(5)) == (1, ) * 5
data = [{"name": "John"}, {"name": "Bill"}, {"name": "Nick"}]
assert c.tuple_comp(c.item("name")).sort(
key=lambda n: n).gen_converter()(data) == ("Bill", "John", "Nick")
assert c.tuple_comp(c.item("name")).sort().gen_converter()(data) == (
"Bill",
"John",
"Nick",
)
assert c.tuple_comp(c.item("name")).sort(
key=lambda n: n,
reverse=True).gen_converter()(data) == ("Nick", "John", "Bill")
def test_comprehensions_sorting():
assert c.generator_comp(c.this()).sort().execute(
[2, 1, 3], debug=False
) == [1, 2, 3]
assert c.list_comp(c.this()).sort().execute([2, 1, 3], debug=False) == [
1,
2,
3,
]
assert c.this().pipe(c.list_comp(c.this())).sort().execute(
[2, 1, 3], debug=False
) == [
1,
2,
3,
]
assert c.list_comp(c.this()).sort().sort(reverse=True).execute(
[2, 1, 3], debug=False
) == [3, 2, 1]
assert c.set_comp(c.this()).sort().execute([2, 2, 1, 3], debug=False) == [
1,
2,
3,
]
assert c.tuple_comp(c.this()).sort().execute(
[2, 2, 1, 3], debug=False
) == (
1,
2,
2,
3,
)
assert c.dict_comp(c.this() * -1, c.this()).sort().execute(
[2, 2, 1, 3], debug=False
) == OrderedDict(
[
(-3, 3),
(-2, 2),
(-1, 1),
]
)
