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test_simpleeval.py
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127 lines (98 loc) · 4.37 KB
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# -*- coding: utf-8 -*-
importast
importnumbers
frombpython.simpleevalimport (simple_eval,
evaluate_current_expression,
EvaluationError)
frombpython.testimportunittest
classTestSimpleEval(unittest.TestCase):
defassertMatchesStdlib(self,expr):
self.assertEqual(ast.literal_eval(expr),simple_eval(expr))
deftest_matches_stdlib(self):
"""Should match the stdlib literal_eval if no names or indexing"""
self.assertMatchesStdlib("[1]")
self.assertMatchesStdlib("{(1,): [2,3,{}]}")
deftest_indexing(self):
"""Literals can be indexed into"""
self.assertEqual(simple_eval('[1,2][0]'),1)
self.assertEqual(simple_eval('a', {'a':1}),1)
deftest_name_lookup(self):
"""Names can be lookup up in a namespace"""
self.assertEqual(simple_eval('a', {'a':1}),1)
self.assertEqual(simple_eval('map'),map)
self.assertEqual(simple_eval('a[b]', {'a': {'c':1},'b':'c'}),1)
deftest_allow_name_lookup(self):
"""Names can be lookup up in a namespace"""
self.assertEqual(simple_eval('a', {'a':1}),1)
deftest_lookup_on_suspicious_types(self):
classFakeDict(object):
pass
withself.assertRaises(ValueError):
simple_eval('a[1]', {'a':FakeDict()})
classTrickyDict(dict):
def__getitem__(self,index):
self.fail("doing key lookup isn't safe")
withself.assertRaises(ValueError):
simple_eval('a[1]', {'a':TrickyDict()})
classSchrodingersDict(dict):
def__getattribute__(inner_self,attr):
self.fail("doing attribute lookup might have side effects")
withself.assertRaises(ValueError):
simple_eval('a[1]', {'a':SchrodingersDict()})
classSchrodingersCatsDict(dict):
def__getattr__(inner_self,attr):
self.fail("doing attribute lookup might have side effects")
withself.assertRaises(ValueError):
simple_eval('a[1]', {'a':SchrodingersDict()})
deftest_operators_on_suspicious_types(self):
classSpam(numbers.Number):
def__add__(inner_self,other):
self.fail("doing attribute lookup might have side effects")
withself.assertRaises(ValueError):
simple_eval('a + 1', {'a':Spam()})
deftest_operators_on_numbers(self):
self.assertEqual(simple_eval('-2'),-2)
self.assertEqual(simple_eval('1 + 1'),2)
self.assertEqual(simple_eval('a - 2', {'a':1}),-1)
withself.assertRaises(ValueError):
simple_eval('2 * 3')
withself.assertRaises(ValueError):
simple_eval('2 ** 3')
deftest_function_calls_raise(self):
withself.assertRaises(ValueError):
simple_eval('1()')
deftest_nonexistant_names_raise(self):
withself.assertRaises(EvaluationError):
simple_eval('a')
classTestEvaluateCurrentExpression(unittest.TestCase):
defassertEvaled(self,line,value,ns=None):
assertline.count('|')==1
cursor_offset=line.find('|')
line=line.replace('|','')
self.assertEqual(evaluate_current_expression(cursor_offset,line,ns),
value)
defassertCannotEval(self,line,ns=None):
assertline.count('|')==1
cursor_offset=line.find('|')
line=line.replace('|','')
withself.assertRaises(EvaluationError):
evaluate_current_expression(cursor_offset,line,ns)
deftest_simple(self):
self.assertEvaled('[1].a|bc', [1])
self.assertEvaled('[1].abc|', [1])
self.assertEvaled('[1].|abc', [1])
self.assertEvaled('[1]. |abc', [1])
self.assertEvaled('[1] .|abc', [1])
self.assertCannotEval('[1].abc |', [1])
self.assertCannotEval('[1]. abc |', [1])
self.assertCannotEval('[2][1].a|bc', [1])
deftest_nonsense(self):
self.assertEvaled('!@#$ [1].a|bc', [1])
self.assertEvaled('--- [2][0].a|bc',2)
self.assertCannotEval('"asdf".centered()[1].a|bc')
self.assertEvaled('"asdf"[1].a|bc','s')
deftest_with_namespace(self):
self.assertEvaled('a[1].a|bc','d', {'a':'adsf'})
self.assertCannotEval('a[1].a|bc', {})
if__name__=='__main__':
unittest.main()