lambda x, y, z: replace_if(x, y, z) == (z if x in y else x),
int, [int], str)
def replace_if_prop(x, y, z):
return replace_if(x, y, z) == (z if x in y else x)
my_falsify("replace if2", replace_if_prop, int, [int], str)
my_falsify("replace alternating",
lambda ss, ts, rs:
for_all_not_in(ts, replace_alternating(ss, ts, rs), rs),
[str], [str], [str])
my_falsify("cycle1", lambda x: (not x) or
(get_from_gen(cycle(x), 0) == get_from_gen(cycle(x), len(x))),
[int])
my_falsify("cycle false", lambda x: (not x) or
(get_from_gen(cycle(x), 1) ==
get_from_gen(cycle(x), 2 + 2 * len(x))),
# +1 would be correct
[int])
my_falsify("strict evaluation", lambda x: implies(x,
(get_from_gen(cycle(x), 0) == get_from_gen(cycle(x), len(x)))),
[int])
my_falsify("lazy implies", lambda x: implies(x, lambda:
(get_from_gen(cycle(x), 0) == get_from_gen(cycle(x), len(x)))),
[int])
def test_cycle(x):
assert (not x) or (get_from_gen(cycle(x), 0) == get_from_gen(cycle(x), len(x)))
assert (not x) or (get_from_gen(cycle(x), 1) == get_from_gen(cycle(x), 2 + 2 * len(x)))