def check_reconversion(s, exact):
""" Checks that we can eval() the __repr__() value and we get
an equivalent object. """
parsed = parse_contract_string(s)
s2 = parsed.__str__()
reconv = parse_contract_string(s2)
msg = 'Reparsing gives different objects:\n'
msg += ' Original string: %r\n' % s
msg += ' parsed: %r\n' % parsed
msg += ' Regenerated: %r\n' % s2
msg += ' reparsed: %r' % reconv
assert reconv == parsed, msg
if exact:
# Warn if the string is not exactly the same.
if s2 != s:
msg = ('Slight different regenerated strings:\n')
msg += (' original: %s\n' % s)
msg += (' generated: %s\n' % s2)
msg += (' parsed the first time as: %r\n' % parsed)
msg += (' and then as: %r' % reconv)
assert s2 == s, msg
def test_syntax_integer_arithmetic():
# TODO : these `.check()` calls should return
# a boolean for testing purposes
value = parse_contract_string('=2')
value.check(2)
with raises(ContractNotRespected):
value.check(3)
eq_one_plus_one = parse_contract_string('=1+1')
eq_one_plus_one.check(2)
with raises(ContractNotRespected):
value.check(5)
one_plus_one = parse_contract_string('1+1')
one_plus_one.check(2)
with raises(ContractNotRespected):
value.check(10)
eq_one_minus_one = parse_contract_string('=1-1')
eq_one_minus_one.check(0)
with raises(ContractNotRespected):
value.check(0)
one_minus_one = parse_contract_string('1-1')
one_minus_one.check(0)
with raises(ContractNotRespected):
value.check(-1)
def __init__(self, name, map=None, meta=None, contract=None):
if not isinstance(name, str):
raise PyungoError(
f"IO name must be str, however get name = {name} with type {type(name)}"
)
if '.' in name:
raise PyungoError(
f"IO can't have '.' in name, however get name = {name}")
self._name = name
self._meta = meta if meta is not None else {}
self._value = None
self._contract = None
if map is not None:
if not isinstance(map, str):
raise PyungoError(
f"IO map must be str, however get map = {map} with type {type(map)}"
)
if '.' in map:
raise PyungoError(
f"IO can't have '.' in map, however get map = {map}")
self._map = map if map is not None else self._name
if contract:
try:
from contracts.main import parse_contract_string
except ImportError:
raise ImportError('pycontracts is needed to use contracts')
self._contract = parse_contract_string(contract)
def check_contracts_fail(contract, value, error=ContractNotRespected):
""" Returns the exception """
if isinstance(contract, six.string_types):
contract = [contract]
value = [value]
try:
context = check_contracts(contract, value)
msg = ('I was expecting that the values would not not'
' satisfy the contract.\n')
for v in value:
msg += ' value: %s\n' % describe_value(v)
for c in contract:
cp = parse_contract_string(c)
msg += ' contract: %r, parsed as %r (%s)\n' % (c, cp, cp)
msg += ' context: %r\n' % context
raise Exception(msg)
except error as e:
# Try generation of strings:
s = "%r" % e # @UnusedVariable
s = "%s" % e # @UnusedVariable
return e
def __init__(self, name, meta=None, contract=None):
self._name = name
self._meta = meta if meta is not None else {}
self._value = None
self._contract = None
if contract:
try:
from contracts.main import parse_contract_string
except ImportError:
raise ImportError('pycontracts is needed to use contracts')
self._contract = parse_contract_string(contract)
def syntax_fail(string):
assert isinstance(string, six.string_types)
try:
parsed_contract = parse_contract_string(string)
msg = 'I would not expect to parse %r.' % string
msg += ' contract: %s\n' % parsed_contract
return False
except ContractSyntaxError as e:
# Try generation of strings:
s = "%r" % e # @UnusedVariable
s = "%s" % e # @UnusedVariable
return True
def check_good_repr(c):
""" Checks that we can eval() the __repr__() value and we get
an equivalent object. """
parsed = parse_contract_string(c)
# Check that it compares true with itself
assert parsed.__eq__(parsed), 'Repr does not know itself: %r' % parsed
reprc = parsed.__repr__()
try:
reeval = eval(reprc)
except Exception as e:
traceback.print_exc()
raise Exception('Could not evaluate expression %r: %s' % (reprc, e))
assert reeval == parsed, \
'Repr gives different object:\n %r !=\n %r' % (parsed, reeval)
def test_unicode_literal():
result = parse_contract_string(u'int')
assert result == Extension('int')
def test_unicode_literal(self):
r = parse_contract_string(u'int')
print(r)
def test_syntax_floats():
assert parse_contract_string('=%r' % 1.0)
assert parse_contract_string('%r' % 1.0)
assert parse_contract_string('=%r' % 1e10)
assert parse_contract_string('%r' % 1e10)
def test_syntax_ints():
assert parse_contract_string('=%r' % 1)
assert parse_contract_string('%r' % 1)
assert parse_contract_string('=%r' % -1)
assert parse_contract_string('%r' % -1)