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from verify import *
def fails(f):
failed = False
try:
f()
except:
failed = True
if failed == False:
raise ValueError("Error, function did not fail")
# Tests
@accepts(Number())
#@returns(Number())
def add_three(n):
return n+3
add_three(4)
add_three(-10)
fails(lambda : add_three("hello"))
@accepts(Number(), Number())
@returns(Number())
def add(n, m):
return n+m
add(4, 5)
@accepts(Number(), Number())
@requires("n >= m")
@returns(Number())
@ensures("return >= 0")
def subtract(n, m):
return n - m
@accepts(Range(-1, 1))
@returns(Range(0, 1))
def square(n):
return n*n
square(.3)
@accepts(RangeClosedOpen(-1, 1))
@returns(Range(0, 1))
def square(n):
return n*n
square(-1)
fails(lambda : square(1))
@accepts(RangeOpenClosed(-1, 1))
@returns(Range(0, 1))
def square(n):
return n*n
square(1)
fails(lambda : square(-1))
@accepts(RangeOpen(-1, 1))
@returns(RangeClosedOpen(0, 1))
def square(n):
return n*n
square(.99999)
fails(lambda : square(1))
@accepts(List(Integer()))
@returns(Integer())
def sumlist(l):
return sum(l)
sumlist([3, 6, 2, 1])
@accepts(Dict(String(), Number()))
@returns(Dict(String(), Number()))
def ident(d):
return d
ident({"a" : 3, "b" : 901.90})
fails(lambda : ident({"a" : "a", "b" : 901.90, "c" : 22}))
fails(lambda : ident({"a" : 33, "b" : 901.90, 22 : 22}))
class MyType:
def __init__(self, val):
self.val = val
@staticmethod
def _generate():
vals = ["string", 3, 11]
return [MyType(v) for v in vals]
@accepts(MyType)
@returns(MyType)
def myfun(mt):
return MyType(3)
myfun(MyType(1))
fails(lambda : myfun("abc"))
@accepts(And(Natural0(), Or(Range(low=4, high=7), Range(low=12, high=15))))
@returns(Natural1())
def addthree(a):
return a+3
addthree(4)
addthree(5)
fails(lambda : addthree(9))
fails(lambda : addthree(2))
@accepts(String)
@returns(Nothing)
def pass_it(s):
pass
pass_it("ars")
@accepts(Number())
@returns(Number())
@ensures("n` <= n <--> return` <= return")
def monotonic(n):
return n**3
monotonic(-3)
monotonic(-2)
monotonic(-1)
test_function(monotonic)
@accepts(Number(), Number())
@returns(Number())
@ensures("return == n + m")
@ensures("return >= m + n")
@ensures("m > 0 and n > 0 --> return > 0")
@ensures("m` >= m and n` >= n --> return` >= return")
def add(n, m):
return n+m
add(0, 5)
add(0, 6)
add(0, 3)
add(7, 3)
test_function(add)
@verifiedclass
class MyClass:
def __init__(self, val, **kwargs):
self.val = val
self.extraargs = kwargs
@staticmethod
def _test(v):
Number().test(v.val)
Dict(String(), String()).test(v.extraargs)
@staticmethod
def _generate():
vals = [3, 11, -3.1]
return [MyClass(v, extraarg='ata') for v in vals]
@accepts(Self, Number)
def testfun(self, x):
return self.val + x
@accepts(Self, Number)
def testfun2(self, x, **kwargs):
return self.val + x
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