def _f(self, p=p):
self.depth = depth
out = speccer.spec(depth, getattr(self, p), output=False)
# raise other exceptions out
if isinstance(out, speccer.UnrelatedException):
raise out.reason
self.assertIsInstance(out, speccer.clauses.Success)
def _f(self, p=p):
self.depth = depth
out = speccer.spec(depth, getattr(self, p), output=False)
# raise other exceptions out
if isinstance(out, speccer.UnrelatedException):
raise out.reason
self.assertIsInstance(out, speccer.clauses.Success)
#!/usr/bin/env python3
from speccer import spec, forall
from typing import List
def is_sorted(xs):
return xs == list(sorted(xs))
def prop_all_lists_are_sorted():
return forall(List[int], is_sorted)
if __name__ == '__main__':
spec(4, prop_all_lists_are_sorted)
'''
Sample Output:
....F
================================================================================
Failure
After 4 call(s) (0 did not meet implication)
To depth 4
In property `prop_all_lists_are_sorted`
prop_all_lists_are_sorted.FORALL(List[int]) ->
counterexample:
xs=[1, 0]
FAIL
'''
return list(sorted(xs)) == xs
def prop_sorted():
'''A sorted list of length 2 exists
'''
return speccer.exists(List[int],
lambda xs: speccer.assertThat(is_sorted, xs) and speccer.assertEqual(len(xs), 2))
def prop_nested():
return speccer.forall(List[int],
lambda xs: speccer.forall(int,
lambda y: y in xs))
if __name__ == '__main__':
speccer.spec(3, prop_nested)
'''
Sample Output:
>> spec(3, prop_sorted)
...*
----------------------------------------
Found witness after 4 call(s)
In Property `prop_sorted`
----------------------------------------
Found Witness:
prop_sorted::EXISTS(List[int]) ->
xs=[0, 0]
Reason:
def run_spec(depth, p):
sio = io.StringIO()
spec(depth, p, outfile=sio)
return sio.getvalue()
def prop_sorted():
'''A sorted list of length 2 exists
'''
return speccer.exists(
List[int],
lambda xs: speccer.assertThat(is_sorted, xs) and speccer.assertEqual(
len(xs), 2))
def prop_nested():
return speccer.forall(List[int],
lambda xs: speccer.forall(int, lambda y: y in xs))
if __name__ == '__main__':
speccer.spec(3, prop_nested)
'''
Sample Output:
>> spec(3, prop_sorted)
...*
----------------------------------------
Found witness after 4 call(s)
In Property `prop_sorted`
----------------------------------------
Found Witness:
prop_sorted::EXISTS(List[int]) ->
xs=[0, 0]
Reason:
> prop_sorted::EXISTS(List[int]), assert is_sorted([0, 0])