diff options
Diffstat (limited to 'Lib/test/test_ast.py')
| -rw-r--r-- | Lib/test/test_ast.py | 109 |
1 files changed, 100 insertions, 9 deletions
diff --git a/Lib/test/test_ast.py b/Lib/test/test_ast.py index 4c74cf7..2aa3b8f 100644 --- a/Lib/test/test_ast.py +++ b/Lib/test/test_ast.py @@ -1,6 +1,6 @@ import sys, unittest from test import support -import _ast +import ast def to_tuple(t): if t is None or isinstance(t, (str, int, complex)): @@ -117,9 +117,9 @@ eval_tests = [ class AST_Tests(unittest.TestCase): def _assert_order(self, ast_node, parent_pos): - if not isinstance(ast_node, _ast.AST) or ast_node._fields is None: + if not isinstance(ast_node, ast.AST) or ast_node._fields is None: return - if isinstance(ast_node, (_ast.expr, _ast.stmt, _ast.excepthandler)): + if isinstance(ast_node, (ast.expr, ast.stmt, ast.excepthandler)): node_pos = (ast_node.lineno, ast_node.col_offset) self.assert_(node_pos >= parent_pos) parent_pos = (ast_node.lineno, ast_node.col_offset) @@ -136,29 +136,29 @@ class AST_Tests(unittest.TestCase): (single_tests, single_results, "single"), (eval_tests, eval_results, "eval")): for i, o in zip(input, output): - ast_tree = compile(i, "?", kind, _ast.PyCF_ONLY_AST) + ast_tree = compile(i, "?", kind, ast.PyCF_ONLY_AST) self.assertEquals(to_tuple(ast_tree), o) self._assert_order(ast_tree, (0, 0)) def test_nodeclasses(self): - x = _ast.BinOp(1, 2, 3, lineno=0) + x = ast.BinOp(1, 2, 3, lineno=0) self.assertEquals(x.left, 1) self.assertEquals(x.op, 2) self.assertEquals(x.right, 3) self.assertEquals(x.lineno, 0) # node raises exception when not given enough arguments - self.assertRaises(TypeError, _ast.BinOp, 1, 2) + self.assertRaises(TypeError, ast.BinOp, 1, 2) # can set attributes through kwargs too - x = _ast.BinOp(left=1, op=2, right=3, lineno=0) + x = ast.BinOp(left=1, op=2, right=3, lineno=0) self.assertEquals(x.left, 1) self.assertEquals(x.op, 2) self.assertEquals(x.right, 3) self.assertEquals(x.lineno, 0) # this used to fail because Sub._fields was None - x = _ast.Sub() + x = ast.Sub() def test_pickling(self): import pickle @@ -175,8 +175,99 @@ class AST_Tests(unittest.TestCase): ast2 = mod.loads(mod.dumps(ast, protocol)) self.assertEquals(to_tuple(ast2), to_tuple(ast)) + +class ASTHelpers_Test(unittest.TestCase): + + def test_parse(self): + a = ast.parse('foo(1 + 1)') + b = compile('foo(1 + 1)', '<unknown>', 'exec', ast.PyCF_ONLY_AST) + self.assertEqual(ast.dump(a), ast.dump(b)) + + def test_dump(self): + node = ast.parse('spam(eggs, "and cheese")') + self.assertEqual(ast.dump(node), + "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load()), " + "args=[Name(id='eggs', ctx=Load()), Str(s='and cheese')], " + "keywords=[], starargs=None, kwargs=None))])" + ) + self.assertEqual(ast.dump(node, annotate_fields=False), + "Module([Expr(Call(Name('spam', Load()), [Name('eggs', Load()), " + "Str('and cheese')], [], None, None))])" + ) + self.assertEqual(ast.dump(node, include_attributes=True), + "Module(body=[Expr(value=Call(func=Name(id='spam', ctx=Load(), " + "lineno=1, col_offset=0), args=[Name(id='eggs', ctx=Load(), " + "lineno=1, col_offset=5), Str(s='and cheese', lineno=1, " + "col_offset=11)], keywords=[], starargs=None, kwargs=None, " + "lineno=1, col_offset=0), lineno=1, col_offset=0)])" + ) + + def test_copy_location(self): + src = ast.parse('1 + 1', mode='eval') + src.body.right = ast.copy_location(ast.Num(2), src.body.right) + self.assertEqual(ast.dump(src, include_attributes=True), + 'Expression(body=BinOp(left=Num(n=1, lineno=1, col_offset=0), ' + 'op=Add(), right=Num(n=2, lineno=1, col_offset=4), lineno=1, ' + 'col_offset=0))' + ) + + def test_fix_missing_locations(self): + src = ast.parse('write("spam")') + src.body.append(ast.Expr(ast.Call(ast.Name('spam', ast.Load()), + [ast.Str('eggs')], [], None, None))) + self.assertEqual(src, ast.fix_missing_locations(src)) + self.assertEqual(ast.dump(src, include_attributes=True), + "Module(body=[Expr(value=Call(func=Name(id='write', ctx=Load(), " + "lineno=1, col_offset=0), args=[Str(s='spam', lineno=1, " + "col_offset=6)], keywords=[], starargs=None, kwargs=None, " + "lineno=1, col_offset=0), lineno=1, col_offset=0), " + "Expr(value=Call(func=Name(id='spam', ctx=Load(), lineno=1, " + "col_offset=0), args=[Str(s='eggs', lineno=1, col_offset=0)], " + "keywords=[], starargs=None, kwargs=None, lineno=1, " + "col_offset=0), lineno=1, col_offset=0)])" + ) + + def test_increment_lineno(self): + src = ast.parse('1 + 1', mode='eval') + self.assertEqual(ast.increment_lineno(src, n=3), src) + self.assertEqual(ast.dump(src, include_attributes=True), + 'Expression(body=BinOp(left=Num(n=1, lineno=4, col_offset=0), ' + 'op=Add(), right=Num(n=1, lineno=4, col_offset=4), lineno=4, ' + 'col_offset=0))' + ) + + def test_iter_fields(self): + node = ast.parse('foo()', mode='eval') + d = dict(ast.iter_fields(node.body)) + self.assertEqual(d.pop('func').id, 'foo') + self.assertEqual(d, {'keywords': [], 'kwargs': None, + 'args': [], 'starargs': None}) + + def test_iter_child_nodes(self): + node = ast.parse("spam(23, 42, eggs='leek')", mode='eval') + self.assertEqual(len(list(ast.iter_child_nodes(node.body))), 4) + iterator = ast.iter_child_nodes(node.body) + self.assertEqual(next(iterator).id, 'spam') + self.assertEqual(next(iterator).n, 23) + self.assertEqual(next(iterator).n, 42) + self.assertEqual(ast.dump(next(iterator)), + "keyword(arg='eggs', value=Str(s='leek'))" + ) + + def test_get_docstring(self): + node = ast.parse('def foo():\n """line one\n line two"""') + self.assertEqual(ast.get_docstring(node.body[0]), + 'line one\nline two') + + def test_literal_eval(self): + self.assertEqual(ast.literal_eval('[1, 2, 3]'), [1, 2, 3]) + self.assertEqual(ast.literal_eval('{"foo": 42}'), {"foo": 42}) + self.assertEqual(ast.literal_eval('(True, False, None)'), (True, False, None)) + self.assertRaises(ValueError, ast.literal_eval, 'foo()') + + def test_main(): - support.run_unittest(AST_Tests) + support.run_unittest(AST_Tests, ASTHelpers_Test) def main(): if __name__ != '__main__': |