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import pytest
from pypy.interpreter.pyparser import pyparse
from pypy.interpreter.pyparser.error import SyntaxError
from pypy.interpreter.astcompiler import ast, consts
from pypy.interpreter.astcompiler.unparse import unparse, unparse_annotations
class TestAstUnparser:
def setup_class(cls):
cls.parser = pyparse.PegParser(cls.space)
def get_ast(self, source, p_mode="exec", flags=None):
if flags is None:
flags = consts.CO_FUTURE_WITH_STATEMENT
ec = self.space.getexecutioncontext()
ast_node = ec.compiler.compile_to_ast(source, "?", p_mode, flags)
return ast_node
def get_first_expr(self, source, p_mode="exec", flags=None):
mod = self.get_ast(source, p_mode, flags)
assert len(mod.body) == 1
expr = mod.body[0]
assert isinstance(expr, ast.Expr)
return expr.value
def check(self, expr, unparsed=None):
if unparsed is None:
unparsed = expr
ast = self.get_first_expr(expr)
assert unparse(self.space, ast) == unparsed
# should be stable
if expr != unparsed:
ast = self.get_first_expr(unparsed)
assert unparse(self.space, ast) == unparsed
def test_constant(self):
w_one = self.space.newint(1)
node = ast.Constant(w_one, self.space.w_None, 0, 0, 0, 0)
assert unparse(self.space, node) == "1"
def test_num(self):
self.check("1")
self.check("1.64")
def test_str(self):
self.check("u'a'", "'a'")
def test_bytes(self):
self.check("b'a'")
def test_name(self):
self.check('a')
def test_name_constant(self):
self.check('True')
self.check('False')
self.check('None')
def test_unaryop(self):
self.check('+a')
self.check('-a')
self.check('~a')
self.check('not a')
def test_binaryop(self):
self.check('b+a', "b + a")
self.check('c*(b+a)', "c * (b + a)")
self.check('c**(b+a)', "c ** (b + a)")
self.check('2**2**3', "2 ** 2 ** 3")
self.check('(2**2)**3', "(2 ** 2) ** 3")
self.check('2 << 2 << 3')
self.check('2<<(2<<3)', "2 << (2 << 3)")
def test_compare(self):
self.check('b == 5 == c == d')
def test_boolop(self):
self.check('b and a and c or d')
def test_if(self):
self.check('a if b else c')
self.check('0 if not x else 1 if x > 0 else -1')
def test_list(self):
self.check('[]')
self.check('[1, 2, 3, 4]')
def test_tuple(self):
self.check('()')
self.check('(a,)')
self.check('([1, 2], a + 6, 3, 4)')
def test_sets(self):
self.check('{1}')
self.check('{(1, 2), a + 6, 3, 4}')
def test_dict(self):
self.check('{}')
self.check('{a: b, c: d}')
self.check('{1: 2, **x}')
def test_list_comprehension(self):
self.check('[a for x in y if b if c]')
def test_genexp(self):
self.check('(a for x in y for z in b)')
def test_set_comprehension(self):
self.check('{a for x, in y for z in b}')
def test_dict_comprehension(self):
self.check('{a: b for x in y}')
def test_ellipsis(self):
self.check('...')
def test_index(self):
self.check('a[1]')
self.check('a[1:5]')
self.check('a[1:5, 7:12, :, 5]')
self.check('a[::1]')
self.check('dict[(str, int)]', 'dict[str, int]')
def test_attribute(self):
self.check('a.b.c')
self.check('1 .b')
self.check('1.5.b')
def test_call(self):
self.check('f()')
self.check('f(a)')
self.check('f(a, b, 1)')
self.check('f(a, b, 1, a=4, b=78)')
self.check('f(a, x=y, **b, **c)')
self.check('f(*a)')
self.check('f(x for y in z)')
def test_lambda(self):
self.check('lambda: 1')
self.check('lambda a: 1')
self.check('lambda a=1: 1')
self.check('lambda b, c: 1')
self.check('lambda *l: 1')
self.check('lambda *, m, l=5: 1')
self.check('lambda **foo: 1')
self.check('lambda a, **b: 45')
def test_fstrings(self):
self.check('f"abc"', "'abc'")
self.check("f'{{{a}'", "f'{{{a}'")
self.check("f'{{{a}'", "f'{{{a}'")
self.check("f'{x+1!a}'", "f'{x + 1!a}'")
self.check("f'{x+1:x}'", "f'{x + 1:x}'")
self.check("f'some f-string with {a} {few():.2f} {formatted.values!r}'")
self.check('''f"{f'{nested} inner'} outer"''')
self.check("f'space between opening braces: { {a for a in (1, 2, 3)}}'")
self.check("f'{(lambda x: x)}'")
self.check("f'{(None if a else lambda x: x)}'")
class TestAstUnparseAnnotations(object):
def setup_class(cls):
cls.parser = pyparse.PegParser(cls.space)
def get_ast(self, source, p_mode="exec", flags=None):
if flags is None:
flags = consts.CO_FUTURE_WITH_STATEMENT
ec = self.space.getexecutioncontext()
ast_node = ec.compiler.compile_to_ast(source, "?", p_mode, flags)
return ast_node
def test_function(self):
ast = self.get_ast("""def f(a: b) -> 1 + 2: return a + 12""")
func = ast.body[0]
res = unparse_annotations(self.space, func)
assert self.space.text_w(res.args.args[0].annotation.value) == "b"
assert self.space.text_w(res.returns.value) == "1 + 2"
def test_global(self):
ast = self.get_ast("""a: list[int]""")
res = unparse_annotations(self.space, ast)
assert self.space.text_w(res.body[0].annotation.value) == 'list[int]'
def test_await(self):
ast = self.get_ast("""def f() -> await some.complicated[0].call(with_args=True or 1 is not 1): pass""")
func = ast.body[0]
res = unparse_annotations(self.space, func)
assert self.space.text_w(res.returns.value) == "await some.complicated[0].call(with_args=True or 1 is not 1)"
def test_yield_not_allowed(self):
ast = self.get_ast("""def f():\n a: (yield)""")
func = ast.body[0]
with pytest.raises(SyntaxError):
unparse_annotations(self.space, func)
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