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add more ast tests (closes #11302) 

A patch from Vincent Legoll.
This commit is contained in:
Benjamin Peterson 2011-06-27 17:46:06 -05:00
parent 84e3ccc48d
commit 6ccfe85847
1 changed files with 180 additions and 0 deletions
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180
Lib/test/test_ast.py
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@ -20,10 +20,24 @@ def to_tuple(t):
# These tests are compiled through "exec"
# There should be atleast one test per statement
exec_tests = [
# None
"None",
# FunctionDef
"def f(): pass",
# FunctionDef with arg
"def f(a): pass",
# FunctionDef with arg and default value
"def f(a=0): pass",
# FunctionDef with varargs
"def f(*args): pass",
# FunctionDef with kwargs
"def f(**kwargs): pass",
# FunctionDef with all kind of args
"def f(a, b=1, c=None, d=[], e={}, *args, **kwargs): pass",
# ClassDef
"class C:pass",
# ClassDef, new style class
"class C(object): pass",
# Return
"def f():return 1",
# Delete
@ -64,6 +78,27 @@ exec_tests = [
"for a,b in c: pass",
"[(a,b) for a,b in c]",
"((a,b) for a,b in c)",
"((a,b) for (a,b) in c)",
# Multiline generator expression (test for .lineno & .col_offset)
"""(
(
Aa
,
Bb
)
for
Aa
,
Bb in Cc
)""",
# dictcomp
"{a : b for w in x for m in p if g}",
# dictcomp with naked tuple
"{a : b for v,w in x}",
# setcomp
"{r for l in x if g}",
# setcomp with naked tuple
"{r for l,m in x}",
]
# These are compiled through "single"
@ -76,6 +111,8 @@ single_tests = [
# These are compiled through "eval"
# It should test all expressions
eval_tests = [
# None
"None",
# BoolOp
"a and b",
# BinOp
@ -86,6 +123,16 @@ eval_tests = [
"lambda:None",
# Dict
"{ 1:2 }",
# Empty dict
"{}",
# Set
"{None,}",
# Multiline dict (test for .lineno & .col_offset)
"""{
1
:
2
}""",
# ListComp
"[a for b in c if d]",
# GeneratorExp
@ -108,8 +155,14 @@ eval_tests = [
"v",
# List
"[1,2,3]",
# Empty list
"[]",
# Tuple
"1,2,3",
# Tuple
"(1,2,3)",
# Empty tuple
"()",
# Combination
"a.b.c.d(a.b[1:2])",
@ -135,6 +188,23 @@ class AST_Tests(unittest.TestCase):
elif value is not None:
self._assertTrueorder(value, parent_pos)
def test_AST_objects(self):
x = ast.AST()
self.assertEqual(x._fields, ())
with self.assertRaises(AttributeError):
x.vararg
with self.assertRaises(AttributeError):
x.foobar = 21
with self.assertRaises(AttributeError):
ast.AST(lineno=2)
with self.assertRaises(TypeError):
# "_ast.AST constructor takes 0 positional arguments"
ast.AST(2)
def test_snippets(self):
for input, output, kind in ((exec_tests, exec_results, "exec"),
(single_tests, single_results, "single"),
@ -162,7 +232,85 @@ class AST_Tests(unittest.TestCase):
self.assertTrue(issubclass(ast.comprehension, ast.AST))
self.assertTrue(issubclass(ast.Gt, ast.AST))
def test_field_attr_existence(self):
for name, item in ast.__dict__.items():
if isinstance(item, type) and name != 'AST' and name[0].isupper():
x = item()
if isinstance(x, ast.AST):
self.assertEqual(type(x._fields), tuple)
def test_arguments(self):
x = ast.arguments()
self.assertEqual(x._fields, ('args', 'vararg', 'varargannotation',
'kwonlyargs', 'kwarg', 'kwargannotation',
'defaults', 'kw_defaults'))
with self.assertRaises(AttributeError):
x.vararg
x = ast.arguments(*range(1, 9))
self.assertEqual(x.vararg, 2)
def test_field_attr_writable(self):
x = ast.Num()
# We can assign to _fields
x._fields = 666
self.assertEqual(x._fields, 666)
def test_classattrs(self):
x = ast.Num()
self.assertEqual(x._fields, ('n',))
with self.assertRaises(AttributeError):
x.n
x = ast.Num(42)
self.assertEqual(x.n, 42)
with self.assertRaises(AttributeError):
x.lineno
with self.assertRaises(AttributeError):
x.foobar
x = ast.Num(lineno=2)
self.assertEqual(x.lineno, 2)
x = ast.Num(42, lineno=0)
self.assertEqual(x.lineno, 0)
self.assertEqual(x._fields, ('n',))
self.assertEqual(x.n, 42)
self.assertRaises(TypeError, ast.Num, 1, 2)
self.assertRaises(TypeError, ast.Num, 1, 2, lineno=0)
def test_module(self):
body = [ast.Num(42)]
x = ast.Module(body)
self.assertEqual(x.body, body)
def test_nodeclasses(self):
# Zero arguments constructor explicitely allowed
x = ast.BinOp()
self.assertEqual(x._fields, ('left', 'op', 'right'))
# Random attribute allowed too
x.foobarbaz = 5
self.assertEqual(x.foobarbaz, 5)
n1 = ast.Num(1)
n3 = ast.Num(3)
addop = ast.Add()
x = ast.BinOp(n1, addop, n3)
self.assertEqual(x.left, n1)
self.assertEqual(x.op, addop)
self.assertEqual(x.right, n3)
x = ast.BinOp(1, 2, 3)
self.assertEqual(x.left, 1)
self.assertEqual(x.op, 2)
self.assertEqual(x.right, 3)
x = ast.BinOp(1, 2, 3, lineno=0)
self.assertEqual(x.left, 1)
self.assertEqual(x.op, 2)
@ -171,6 +319,12 @@ class AST_Tests(unittest.TestCase):
# node raises exception when not given enough arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2)
# node raises exception when given too many arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4)
# node raises exception when not given enough arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2, lineno=0)
# node raises exception when given too many arguments
self.assertRaises(TypeError, ast.BinOp, 1, 2, 3, 4, lineno=0)
# can set attributes through kwargs too
x = ast.BinOp(left=1, op=2, right=3, lineno=0)
@ -179,8 +333,14 @@ class AST_Tests(unittest.TestCase):
self.assertEqual(x.right, 3)
self.assertEqual(x.lineno, 0)
# Random kwargs also allowed
x = ast.BinOp(1, 2, 3, foobarbaz=42)
self.assertEqual(x.foobarbaz, 42)
def test_no_fields(self):
# this used to fail because Sub._fields was None
x = ast.Sub()
self.assertEqual(x._fields, ())
def test_pickling(self):
import pickle
@ -332,8 +492,15 @@ def main():
#### EVERYTHING BELOW IS GENERATED #####
exec_results = [
('Module', [('Expr', (1, 0), ('Name', (1, 0), 'None', ('Load',)))]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], None, None, [], []), [('Pass', (1, 9))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None)], None, None, [], None, None, [], []), [('Pass', (1, 10))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None)], None, None, [], None, None, [('Num', (1, 8), 0)], []), [('Pass', (1, 12))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], 'args', None, [], None, None, [], []), [('Pass', (1, 14))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], 'kwargs', None, [], []), [('Pass', (1, 17))], [], None)]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [('arg', 'a', None), ('arg', 'b', None), ('arg', 'c', None), ('arg', 'd', None), ('arg', 'e', None)], 'args', None, [], 'kwargs', None, [('Num', (1, 11), 1), ('Name', (1, 16), 'None', ('Load',)), ('List', (1, 24), [], ('Load',)), ('Dict', (1, 30), [], [])], []), [('Pass', (1, 52))], [], None)]),
('Module', [('ClassDef', (1, 0), 'C', [], [], None, None, [('Pass', (1, 8))], [])]),
('Module', [('ClassDef', (1, 0), 'C', [('Name', (1, 8), 'object', ('Load',))], [], None, None, [('Pass', (1, 17))], [])]),
('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, [], None, None, [], []), [('Return', (1, 8), ('Num', (1, 15), 1))], [], None)]),
('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
@ -355,16 +522,26 @@ exec_results = [
('Module', [('For', (1, 0), ('Tuple', (1, 4), [('Name', (1, 4), 'a', ('Store',)), ('Name', (1, 6), 'b', ('Store',))], ('Store',)), ('Name', (1, 11), 'c', ('Load',)), [('Pass', (1, 14))], [])]),
('Module', [('Expr', (1, 0), ('ListComp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'a', ('Store',)), ('Name', (1, 13), 'b', ('Store',))], ('Store',)), ('Name', (1, 18), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (1, 1), ('Tuple', (1, 2), [('Name', (1, 2), 'a', ('Load',)), ('Name', (1, 4), 'b', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (1, 12), [('Name', (1, 12), 'a', ('Store',)), ('Name', (1, 14), 'b', ('Store',))], ('Store',)), ('Name', (1, 20), 'c', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('GeneratorExp', (2, 4), ('Tuple', (3, 4), [('Name', (3, 4), 'Aa', ('Load',)), ('Name', (5, 7), 'Bb', ('Load',))], ('Load',)), [('comprehension', ('Tuple', (8, 4), [('Name', (8, 4), 'Aa', ('Store',)), ('Name', (10, 4), 'Bb', ('Store',))], ('Store',)), ('Name', (10, 10), 'Cc', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('DictComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Name', (1, 11), 'w', ('Store',)), ('Name', (1, 16), 'x', ('Load',)), []), ('comprehension', ('Name', (1, 22), 'm', ('Store',)), ('Name', (1, 27), 'p', ('Load',)), [('Name', (1, 32), 'g', ('Load',))])]))]),
('Module', [('Expr', (1, 0), ('DictComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), ('Name', (1, 5), 'b', ('Load',)), [('comprehension', ('Tuple', (1, 11), [('Name', (1, 11), 'v', ('Store',)), ('Name', (1, 13), 'w', ('Store',))], ('Store',)), ('Name', (1, 18), 'x', ('Load',)), [])]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 12), 'x', ('Load',)), [('Name', (1, 17), 'g', ('Load',))])]))]),
('Module', [('Expr', (1, 0), ('SetComp', (1, 1), ('Name', (1, 1), 'r', ('Load',)), [('comprehension', ('Tuple', (1, 7), [('Name', (1, 7), 'l', ('Store',)), ('Name', (1, 9), 'm', ('Store',))], ('Store',)), ('Name', (1, 14), 'x', ('Load',)), [])]))]),
]
single_results = [
('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
]
eval_results = [
('Expression', ('Name', (1, 0), 'None', ('Load',))),
('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
('Expression', ('Lambda', (1, 0), ('arguments', [], None, None, [], None, None, [], []), ('Name', (1, 7), 'None', ('Load',)))),
('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
('Expression', ('Dict', (1, 0), [], [])),
('Expression', ('Set', (1, 0), [('Name', (1, 1), 'None', ('Load',))])),
('Expression', ('Dict', (1, 0), [('Num', (2, 6), 1)], [('Num', (4, 10), 2)])),
('Expression', ('ListComp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
('Expression', ('GeneratorExp', (1, 1), ('Name', (1, 1), 'a', ('Load',)), [('comprehension', ('Name', (1, 7), 'b', ('Store',)), ('Name', (1, 12), 'c', ('Load',)), [('Name', (1, 17), 'd', ('Load',))])])),
('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
@ -375,7 +552,10 @@ eval_results = [
('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
('Expression', ('Name', (1, 0), 'v', ('Load',))),
('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('List', (1, 0), [], ('Load',))),
('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
('Expression', ('Tuple', (1, 1), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
('Expression', ('Tuple', (1, 0), [], ('Load',))),
('Expression', ('Call', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',)), 'c', ('Load',)), 'd', ('Load',)), [('Subscript', (1, 8), ('Attribute', (1, 8), ('Name', (1, 8), 'a', ('Load',)), 'b', ('Load',)), ('Slice', ('Num', (1, 12), 1), ('Num', (1, 14), 2), None), ('Load',))], [], None, None)),
]
main()