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import unittest
import ast
import gast
import sys
def dump(node):
return gast.dump(node, show_empty=True)
class APITestCase(unittest.TestCase):
def test_literal_eval_string(self):
code = "1, 3"
self.assertEqual(ast.literal_eval(code),
gast.literal_eval(code))
def test_literal_eval_code(self):
code = "[1, 3]"
tree = ast.parse(code, mode='eval')
gtree = gast.parse(code, mode='eval')
self.assertEqual(ast.literal_eval(tree),
gast.literal_eval(gtree))
def test_parse(self):
code = '''
def foo(x=1, *args, **kwargs):
return x + y +len(args) + len(kwargs)
'''
gast.parse(code)
def test_unparse(self):
code = 'def foo(x=1): return x'
self.assertEqual(gast.unparse(gast.parse(code)),
'def foo(x=1):\n return x')
def test_dump0(self):
code = 'lambda x: x'
tree = gast.parse(code, mode='eval')
zdump = dump(tree)
norm = ("Expression(body=Lambda(args=arguments(args=[Name("
"id='x', ctx=Param(), "
"annotation=None, type_comment=None)], posonlyargs=[], "
"vararg=None, kwonlyargs=[], kw_defaults=[], kwarg=None, "
"defaults=[]), body=Name(id='x', ctx=Load(), "
"annotation=None, type_comment=None)"
"))")
self.assertEqual(zdump, norm)
def test_dump1(self):
code = 'def func(): return 1'
tree = gast.parse(code)
node = tree.body[0]
zdump = gast.dump(node)
norm = "FunctionDef(name='func', args=arguments(vararg=None, kwarg=None), body=[Return(value=Constant(value=1, kind=None))], returns=None, type_comment=None)"
self.assertEqual(zdump, norm)
def test_walk(self):
code = 'x + 1'
tree = gast.parse(code, mode='eval')
zdump = dump(tree)
norm = ("Expression(body=BinOp(left=Name(id='x', ctx=Load(), "
"annotation=None, type_comment=None), op=Add(), "
"right=Constant(value=1, kind=None)))")
self.assertEqual(zdump, norm)
self.assertEqual(len(list(gast.walk(tree))), 6)
def test_iter_fields(self):
tree = gast.Constant(value=1, kind=None)
self.assertEqual({name for name, _ in gast.iter_fields(tree)},
{'value', 'kind'})
def test_iter_child_nodes(self):
tree = gast.UnaryOp(gast.USub(), gast.Constant(value=1, kind=None))
self.assertEqual(len(list(gast.iter_fields(tree))),
2)
def test_increment_lineno(self):
tree = gast.Constant(value=1, kind=None)
tree.lineno = 1
gast.increment_lineno(tree)
self.assertEqual(tree.lineno, 2)
def test_get_source_segment(self):
code = 'x + 1'
tree = gast.parse(code)
source = gast.get_source_segment(code, tree.body[0].value.left)
if sys.version_info >= (3, 8):
self.assertEqual(source, 'x')
else:
self.assertEqual(source, None)
def test_get_source_segment_padded(self):
code = 'if 1:\n if 2:\n 3'
tree = gast.parse(code)
if_tree = tree.body[0].body[0]
source_nopadding = gast.get_source_segment(code, if_tree, padded=False)
if sys.version_info >= (3, 8):
self.assertEqual(source_nopadding, 'if 2:\n 3')
else:
self.assertEqual(source_nopadding, None)
source_padding = gast.get_source_segment(code, if_tree, padded=True)
if sys.version_info >= (3, 8):
self.assertEqual(source_padding, ' if 2:\n 3')
else:
self.assertEqual(source_padding, None)
def test_get_docstring_function(self):
code = 'def foo(): "foo"'
tree = gast.parse(code)
func = tree.body[0]
docs = gast.get_docstring(func)
self.assertEqual(docs, "foo")
if sys.version_info >= (3, 5):
def test_get_docstring_asyncfunction(self):
code = 'async def foo(): "foo"'
tree = gast.parse(code)
func = tree.body[0]
docs = gast.get_docstring(func)
self.assertEqual(docs, "foo")
def test_get_docstring_module(self):
code = '"foo"'
tree = gast.parse(code)
docs = gast.get_docstring(tree)
self.assertEqual(docs, "foo")
def test_get_docstring_class(self):
code = 'class foo: "foo"'
tree = gast.parse(code)
cls = tree.body[0]
docs = gast.get_docstring(cls)
self.assertEqual(docs, "foo")
def test_get_docstring_expr(self):
code = '1'
tree = gast.parse(code)
func = tree
docs = gast.get_docstring(func)
self.assertEqual(docs, None)
def test_copy_location(self):
tree = gast.Constant(value=1, kind=None)
tree.lineno = 1
tree.col_offset = 2
node = gast.Constant(value=2, kind=None)
gast.copy_location(node, tree)
self.assertEqual(node.lineno, tree.lineno)
self.assertEqual(node.col_offset, tree.col_offset)
def test_fix_missing_locations(self):
node = gast.Constant(value=6, kind=None)
tree = gast.UnaryOp(gast.USub(), node)
tree.lineno = 1
tree.col_offset = 2
gast.fix_missing_locations(tree)
self.assertEqual(node.lineno, tree.lineno)
self.assertEqual(node.col_offset, tree.col_offset)
def test_NodeTransformer(self):
node = gast.Constant(value=6, kind=None)
tree = gast.UnaryOp(gast.USub(), node)
class Trans(gast.NodeTransformer):
def visit_Constant(self, node):
node.value *= 2
return node
tree = Trans().visit(tree)
self.assertEqual(node.value, 12)
def test_NodeVisitor(self):
node = gast.Constant(value=6, kind=None)
tree = gast.UnaryOp(gast.USub(), node)
class Vis(gast.NodeTransformer):
def __init__(self):
self.state = []
def visit_Constant(self, node):
self.state.append(node.value)
vis = Vis()
vis.visit(tree)
self.assertEqual(vis.state, [6])
def test_NodeConstructor(self):
node0 = gast.Name()
load = gast.Load()
node1 = gast.Name('id', load, None, None)
node2 = gast.Name('id', load, None, type_comment=None)
with self.assertRaises(TypeError):
node1 = gast.Name('id', 'ctx', 'annotation', 'type_comment',
'random_field')
for field in gast.Name._fields:
self.assertEqual(getattr(node1, field), getattr(node2, field))
def test_IncompleteNodeConstructor(self):
afd = gast.FunctionDef(
name="f",
args=gast.arguments(
args=[],
posonlyargs=[],
vararg=None,
kwonlyargs=[],
kw_defaults=[],
kwarg=None,
defaults=[],
),
body=[],
decorator_list=[],
returns=None,
type_comment=None,
#type_params=[],
)
# Should not fail even if type_params is not set
afd_ast = gast.gast_to_ast(afd)
self.assertEqual(afd_ast.name, "f")
if hasattr(afd_ast, "type_params"):
self.assertEqual(afd_ast.type_params, [])
if __name__ == '__main__':
unittest.main()
|
