342 lines
14 KiB
Python
342 lines
14 KiB
Python
import sys, itertools, unittest
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from test import test_support
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import ast
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def to_tuple(t):
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if t is None or isinstance(t, (basestring, int, long, complex)):
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return t
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elif isinstance(t, list):
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return [to_tuple(e) for e in t]
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result = [t.__class__.__name__]
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if hasattr(t, 'lineno') and hasattr(t, 'col_offset'):
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result.append((t.lineno, t.col_offset))
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if t._fields is None:
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return tuple(result)
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for f in t._fields:
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result.append(to_tuple(getattr(t, f)))
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return tuple(result)
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# These tests are compiled through "exec"
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# There should be atleast one test per statement
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exec_tests = [
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# FunctionDef
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"def f(): pass",
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# ClassDef
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"class C:pass",
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# Return
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"def f():return 1",
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# Delete
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"del v",
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# Assign
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"v = 1",
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# AugAssign
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"v += 1",
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# Print
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"print >>f, 1, ",
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# For
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"for v in v:pass",
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# While
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"while v:pass",
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# If
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"if v:pass",
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# Raise
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"raise Exception, 'string'",
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# TryExcept
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"try:\n pass\nexcept Exception:\n pass",
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# TryFinally
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"try:\n pass\nfinally:\n pass",
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# Assert
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"assert v",
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# Import
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"import sys",
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# ImportFrom
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"from sys import v",
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# Exec
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"exec 'v'",
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# Global
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"global v",
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# Expr
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"1",
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# Pass,
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"pass",
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# Break
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"break",
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# Continue
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"continue",
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]
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# These are compiled through "single"
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# because of overlap with "eval", it just tests what
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# can't be tested with "eval"
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single_tests = [
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"1+2"
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]
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# These are compiled through "eval"
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# It should test all expressions
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eval_tests = [
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# BoolOp
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"a and b",
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# BinOp
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"a + b",
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# UnaryOp
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"not v",
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# Lambda
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"lambda:None",
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# Dict
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"{ 1:2 }",
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# ListComp
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"[a for b in c if d]",
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# GeneratorExp
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"(a for b in c if d)",
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# Yield - yield expressions can't work outside a function
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#
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# Compare
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"1 < 2 < 3",
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# Call
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"f(1,2,c=3,*d,**e)",
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# Repr
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"`v`",
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# Num
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"10L",
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# Str
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"'string'",
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# Attribute
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"a.b",
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# Subscript
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"a[b:c]",
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# Name
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"v",
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# List
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"[1,2,3]",
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# Tuple
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"1,2,3",
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# Combination
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"a.b.c.d(a.b[1:2])",
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]
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# TODO: expr_context, slice, boolop, operator, unaryop, cmpop, comprehension
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# excepthandler, arguments, keywords, alias
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class AST_Tests(unittest.TestCase):
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def _assert_order(self, ast_node, parent_pos):
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if not isinstance(ast_node, ast.AST) or ast_node._fields is None:
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return
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if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)):
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node_pos = (ast_node.lineno, ast_node.col_offset)
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self.assert_(node_pos >= parent_pos)
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parent_pos = (ast_node.lineno, ast_node.col_offset)
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for name in ast_node._fields:
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value = getattr(ast_node, name)
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if isinstance(value, list):
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for child in value:
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self._assert_order(child, parent_pos)
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elif value is not None:
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self._assert_order(value, parent_pos)
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def test_snippets(self):
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for input, output, kind in ((exec_tests, exec_results, "exec"),
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(single_tests, single_results, "single"),
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(eval_tests, eval_results, "eval")):
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for i, o in itertools.izip(input, output):
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ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST)
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self.assertEquals(to_tuple(ast_tree), o)
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self._assert_order(ast_tree, (0, 0))
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def test_nodeclasses(self):
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x = ast.BinOp(1, 2, 3, lineno=0)
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self.assertEquals(x.left, 1)
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self.assertEquals(x.op, 2)
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self.assertEquals(x.right, 3)
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self.assertEquals(x.lineno, 0)
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# node raises exception when not given enough arguments
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self.assertRaises(TypeError, ast.BinOp, 1, 2)
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# can set attributes through kwargs too
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x = ast.BinOp(left=1, op=2, right=3, lineno=0)
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self.assertEquals(x.left, 1)
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self.assertEquals(x.op, 2)
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self.assertEquals(x.right, 3)
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self.assertEquals(x.lineno, 0)
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# this used to fail because Sub._fields was None
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x = ast.Sub()
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def test_pickling(self):
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import pickle
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mods = [pickle]
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try:
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import cPickle
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mods.append(cPickle)
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except ImportError:
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pass
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protocols = [0, 1, 2]
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for mod in mods:
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for protocol in protocols:
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for ast in (compile(i, "?", "exec", 0x400) for i in exec_tests):
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ast2 = mod.loads(mod.dumps(ast, protocol))
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self.assertEquals(to_tuple(ast2), to_tuple(ast))
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class ASTHelpers_Test(unittest.TestCase):
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def test_parse(self):
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a = ast.parse('foo(1 + 1)')
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b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST)
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self.assertEqual(ast.dump(a), ast.dump(b))
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def test_dump(self):
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node = ast.parse('spam(eggs, "and cheese")')
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self.assertEqual(ast.dump(node),
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"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), "
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"args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], "
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"keywords=[], starargs=None, kwargs=None))])"
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)
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self.assertEqual(ast.dump(node, annotate_fields=False),
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"Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), "
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"Str('and cheese')], [], None, None))])"
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)
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self.assertEqual(ast.dump(node, include_attributes=True),
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"Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), "
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"lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), "
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"lineno=1, col_offset=5), Str(s='and cheese', lineno=1, "
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"col_offset=11)], keywords=[], starargs=None, kwargs=None, "
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"lineno=1, col_offset=0), lineno=1, col_offset=0)])"
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)
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def test_copy_location(self):
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src = ast.parse('1 + 1', mode='eval')
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src.body.right = ast.copy_location(ast.Num(2), src.body.right)
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self.assertEqual(ast.dump(src, include_attributes=True),
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'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), '
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'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, '
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'col_offset=0))'
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)
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def test_fix_missing_locations(self):
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src = ast.parse('write("spam")')
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src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()),
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[ast.Str('eggs')], [], None, None)))
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self.assertEqual(src, ast.fix_missing_locations(src))
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self.assertEqual(ast.dump(src, include_attributes=True),
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"Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), "
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"lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, "
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"col_offset=6)], keywords=[], starargs=None, kwargs=None, "
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"lineno=1, col_offset=0), lineno=1, col_offset=0), "
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"Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, "
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"col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], "
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"keywords=[], starargs=None, kwargs=None, lineno=1, "
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"col_offset=0), lineno=1, col_offset=0)])"
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)
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def test_increment_lineno(self):
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src = ast.parse('1 + 1', mode='eval')
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self.assertEqual(ast.increment_lineno(src, n=3), src)
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self.assertEqual(ast.dump(src, include_attributes=True),
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'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), '
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'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, '
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'col_offset=0))'
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)
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def test_iter_fields(self):
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node = ast.parse('foo()', mode='eval')
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d = dict(ast.iter_fields(node.body))
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self.assertEqual(d.pop('func').id, 'foo')
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self.assertEqual(d, {'keywords': [], 'kwargs': None,
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'args': [], 'starargs': None})
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def test_iter_child_nodes(self):
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node = ast.parse("spam(23, 42, eggs='leek')", mode='eval')
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self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4)
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iterator = ast.iter_child_nodes(node.body)
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self.assertEqual(next(iterator).id, 'spam')
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self.assertEqual(next(iterator).n, 23)
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self.assertEqual(next(iterator).n, 42)
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self.assertEqual(ast.dump(next(iterator)),
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"keyword(arg='eggs', value=Str(s='leek'))"
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)
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def test_get_docstring(self):
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node = ast.parse('def foo():\n """line one\n line two"""')
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self.assertEqual(ast.get_docstring(node.body[0]),
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'line one\nline two')
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def test_literal_eval(self):
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self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3])
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self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42})
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self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None))
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self.assertRaises(ValueError, ast.literal_eval, 'foo()')
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def test_main():
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with test_support._check_py3k_warnings(("backquote not supported",
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SyntaxWarning)):
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test_support.run_unittest(AST_Tests, ASTHelpers_Test)
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def main():
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if __name__ != '__main__':
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return
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if sys.argv[1:] == ['-g']:
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for statements, kind in ((exec_tests, "exec"), (single_tests, "single"),
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(eval_tests, "eval")):
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print kind+"_results = ["
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for s in statements:
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print repr(to_tuple(compile(s, "?", kind, 0x400)))+","
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print "]"
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print "main()"
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raise SystemExit
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test_main()
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#### EVERYTHING BELOW IS GENERATED #####
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exec_results = [
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('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Pass', (1, 9))], [])]),
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('Module', [('ClassDef', (1, 0), 'C', [], [('Pass', (1, 8))], [])]),
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('Module', [('FunctionDef', (1, 0), 'f', ('arguments', [], None, None, []), [('Return', (1, 8), ('Num', (1, 15), 1))], [])]),
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('Module', [('Delete', (1, 0), [('Name', (1, 4), 'v', ('Del',))])]),
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('Module', [('Assign', (1, 0), [('Name', (1, 0), 'v', ('Store',))], ('Num', (1, 4), 1))]),
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('Module', [('AugAssign', (1, 0), ('Name', (1, 0), 'v', ('Store',)), ('Add',), ('Num', (1, 5), 1))]),
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('Module', [('Print', (1, 0), ('Name', (1, 8), 'f', ('Load',)), [('Num', (1, 11), 1)], False)]),
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('Module', [('For', (1, 0), ('Name', (1, 4), 'v', ('Store',)), ('Name', (1, 9), 'v', ('Load',)), [('Pass', (1, 11))], [])]),
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('Module', [('While', (1, 0), ('Name', (1, 6), 'v', ('Load',)), [('Pass', (1, 8))], [])]),
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('Module', [('If', (1, 0), ('Name', (1, 3), 'v', ('Load',)), [('Pass', (1, 5))], [])]),
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('Module', [('Raise', (1, 0), ('Name', (1, 6), 'Exception', ('Load',)), ('Str', (1, 17), 'string'), None)]),
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('Module', [('TryExcept', (1, 0), [('Pass', (2, 2))], [('ExceptHandler', (3, 0), ('Name', (3, 7), 'Exception', ('Load',)), None, [('Pass', (4, 2))])], [])]),
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('Module', [('TryFinally', (1, 0), [('Pass', (2, 2))], [('Pass', (4, 2))])]),
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('Module', [('Assert', (1, 0), ('Name', (1, 7), 'v', ('Load',)), None)]),
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('Module', [('Import', (1, 0), [('alias', 'sys', None)])]),
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('Module', [('ImportFrom', (1, 0), 'sys', [('alias', 'v', None)], 0)]),
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('Module', [('Exec', (1, 0), ('Str', (1, 5), 'v'), None, None)]),
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('Module', [('Global', (1, 0), ['v'])]),
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('Module', [('Expr', (1, 0), ('Num', (1, 0), 1))]),
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('Module', [('Pass', (1, 0))]),
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('Module', [('Break', (1, 0))]),
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('Module', [('Continue', (1, 0))]),
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]
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single_results = [
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('Interactive', [('Expr', (1, 0), ('BinOp', (1, 0), ('Num', (1, 0), 1), ('Add',), ('Num', (1, 2), 2)))]),
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]
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eval_results = [
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('Expression', ('BoolOp', (1, 0), ('And',), [('Name', (1, 0), 'a', ('Load',)), ('Name', (1, 6), 'b', ('Load',))])),
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('Expression', ('BinOp', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Add',), ('Name', (1, 4), 'b', ('Load',)))),
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('Expression', ('UnaryOp', (1, 0), ('Not',), ('Name', (1, 4), 'v', ('Load',)))),
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('Expression', ('Lambda', (1, 0), ('arguments', [], None, None, []), ('Name', (1, 7), 'None', ('Load',)))),
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('Expression', ('Dict', (1, 0), [('Num', (1, 2), 1)], [('Num', (1, 4), 2)])),
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('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',))])])),
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('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',))])])),
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('Expression', ('Compare', (1, 0), ('Num', (1, 0), 1), [('Lt',), ('Lt',)], [('Num', (1, 4), 2), ('Num', (1, 8), 3)])),
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('Expression', ('Call', (1, 0), ('Name', (1, 0), 'f', ('Load',)), [('Num', (1, 2), 1), ('Num', (1, 4), 2)], [('keyword', 'c', ('Num', (1, 8), 3))], ('Name', (1, 11), 'd', ('Load',)), ('Name', (1, 15), 'e', ('Load',)))),
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('Expression', ('Repr', (1, 0), ('Name', (1, 1), 'v', ('Load',)))),
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('Expression', ('Num', (1, 0), 10L)),
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('Expression', ('Str', (1, 0), 'string')),
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('Expression', ('Attribute', (1, 0), ('Name', (1, 0), 'a', ('Load',)), 'b', ('Load',))),
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('Expression', ('Subscript', (1, 0), ('Name', (1, 0), 'a', ('Load',)), ('Slice', ('Name', (1, 2), 'b', ('Load',)), ('Name', (1, 4), 'c', ('Load',)), None), ('Load',))),
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('Expression', ('Name', (1, 0), 'v', ('Load',))),
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('Expression', ('List', (1, 0), [('Num', (1, 1), 1), ('Num', (1, 3), 2), ('Num', (1, 5), 3)], ('Load',))),
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('Expression', ('Tuple', (1, 0), [('Num', (1, 0), 1), ('Num', (1, 2), 2), ('Num', (1, 4), 3)], ('Load',))),
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('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)),
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]
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main()
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