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from chrysacase import ChrysalideTestCase
from pychrysalide.analysis.scan import ScanExpression
from pychrysalide.glibext import ComparableItem
class TestScanExpression(ChrysalideTestCase):
"""TestCase for analysis.scan.ScanExpression."""
def testDirectInstances(self):
"""Reject direct instances."""
with self.assertRaisesRegex(RuntimeError, 'pychrysalide.analysis.scan.ScanExpression is an abstract class'):
e = ScanExpression()
def testBooleanComparison(self):
"""Compare custom scan expressions."""
class StrLenExpr(ScanExpression):
def __init__(self, value):
super().__init__(ScanExpression.ExprValueType.STRING)
self._value = value
def _cmp_rich(self, other, op):
if op == ComparableItem.RichCmpOperation.EQ:
return len(self._value) == len(other._value)
e0 = StrLenExpr('00000000000')
e1 = StrLenExpr('00000000000')
e2 = StrLenExpr('000000000000000000000000000')
self.assertTrue(e0 == e1)
# !?
# Python teste e0 != e1 (non implémenté), puis e1 != e0 (pareil) et en déduit une différence !
# self.assertFalse(e0 != e1)
self.assertFalse(e0 == e2)
# TypeError: '<' not supported between instances of 'StrLenExpr' and 'StrLenExpr'
with self.assertRaisesRegex(TypeError, '\'<\' not supported between instances'):
self.assertTrue(e0 < e1)
# def testTypeSubclassing(self):
# """Verify the data type subclassing is working."""
# class MyType(DataType):
# def __init__(self, num):
# super(MyType, self).__init__()
# self._num = num
# def _to_string(self, include):
# return '%x' % self._num
# def _dup(self):
# return MyType(self._num)
# tp = MyType(0x123)
# self.assertEqual(str(tp), '123')
# tp2 = tp.dup()
# self.assertEqual(str(tp), str(tp2))
# def testTypeDefaultProperties(self):
# """Check for default values of some type properties."""
# class MyPropType(DataType):
# pass
# tp = MyPropType()
# self.assertTrue(tp.handle_namespaces)
# self.assertFalse(tp.is_pointer)
# self.assertFalse(tp.is_reference)
# class MyPropType2(DataType):
# def _handle_namespaces(self):
# return True
# def _is_pointer(self):
# return 123 < 1234
# def _is_reference(self):
# return False
# tp2 = MyPropType2()
# self.assertTrue(tp.handle_namespaces)
# self.assertTrue(tp2.is_pointer)
# self.assertFalse(tp2.is_reference)
# def testTypeNamespaces(self):
# """Test the type namespace property."""
# class MyNSType(DataType):
# def __init__(self, name):
# super(MyNSType, self).__init__()
# self._name = name
# def _to_string(self, include):
# return self._name
# tp = MyNSType('TP')
# ns = MyNSType('NS')
# self.assertIsNone(tp.namespace)
# tp.namespace = (ns, '.')
# self.assertEqual(str(tp), 'NS.TP')
# self.assertEqual(tp.namespace, (ns, '.'))
# def testTypeHash(self):
# """Hash a user-defined type."""
# class MyUserType(DataType):
# def __init__(self, name):
# super(MyUserType, self).__init__()
# self._name = name
# def _hash(self):
# return hash(self._name)
# tp = MyUserType('random')
# self.assertEqual(tp.hash, hash('random') & ((1 << 32) - 1))
# class MyOutOfRangeUserType(DataType):
# hard_coded_hash = -8752470794866657507
# def __init__(self, name):
# super(MyOutOfRangeUserType, self).__init__()
# self._name = name
# def _hash(self):
# return self.hard_coded_hash
# tp = MyOutOfRangeUserType('out-of-range')
# self.assertEqual(tp.hash, MyOutOfRangeUserType.hard_coded_hash & ((1 << 32) - 1))
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