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test_parser.py
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test_parser.py
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# -*- coding: utf-8 -*-
"""Tests the xonsh parser."""
import ast
import builtins
import textwrap
import itertools
import pytest
from xonsh.ast import AST, With, Pass, pdump
from xonsh.parser import Parser
from xonsh.parsers.base import eval_fstr_fields
from tools import VER_FULL, skip_if_py34, skip_if_lt_py36, nodes_equal
# a lot of col_offset data changed from Py v3.5.0 -> v3.5.1
INC_ATTRS = (3, 5, 1) <= VER_FULL
@pytest.fixture(autouse=True)
def xonsh_builtins_autouse(xonsh_builtins):
return xonsh_builtins
PARSER = Parser(lexer_optimize=False, yacc_optimize=False, yacc_debug=True)
def check_ast(inp, run=True, mode="eval", debug_level=0):
__tracebackhide__ = True
# expect a Python AST
exp = ast.parse(inp, mode=mode)
# observe something from xonsh
obs = PARSER.parse(inp, debug_level=debug_level)
# Check that they are equal
assert nodes_equal(exp, obs)
# round trip by running xonsh AST via Python
if run:
exec(compile(obs, "<test-ast>", mode))
def check_stmts(inp, run=True, mode="exec", debug_level=0):
__tracebackhide__ = True
if not inp.endswith("\n"):
inp += "\n"
check_ast(inp, run=run, mode=mode, debug_level=debug_level)
def check_xonsh_ast(xenv, inp, run=True, mode="eval", debug_level=0, return_obs=False):
__tracebackhide__ = True
builtins.__xonsh__.env = xenv
obs = PARSER.parse(inp, debug_level=debug_level)
if obs is None:
return # comment only
bytecode = compile(obs, "<test-xonsh-ast>", mode)
if run:
exec(bytecode)
return obs if return_obs else True
def check_xonsh(xenv, inp, run=True, mode="exec"):
__tracebackhide__ = True
if not inp.endswith("\n"):
inp += "\n"
check_xonsh_ast(xenv, inp, run=run, mode=mode)
#
# Tests
#
#
# expressions
#
def test_int_literal():
check_ast("42")
@skip_if_lt_py36
def test_int_literal_underscore():
check_ast("4_2")
def test_float_literal():
check_ast("42.0")
@skip_if_lt_py36
def test_float_literal_underscore():
check_ast("4_2.4_2")
def test_imag_literal():
check_ast("42j")
def test_float_imag_literal():
check_ast("42.0j")
def test_complex():
check_ast("42+84j")
def test_str_literal():
check_ast('"hello"')
def test_bytes_literal():
check_ast('b"hello"')
check_ast('B"hello"')
def test_raw_literal():
check_ast('r"hell\\o"')
check_ast('R"hell\\o"')
@skip_if_lt_py36
def test_f_literal():
check_ast('f"wakka{yo}yakka{42}"', run=False)
check_ast('F"{yo}"', run=False)
@skip_if_lt_py36
def test_f_env_var():
check_xonsh_ast({}, 'f"{$HOME}"', run=False)
check_xonsh_ast({}, "f'{$XONSH_DEBUG}'", run=False)
check_xonsh_ast({}, 'F"{$PATH} and {$XONSH_DEBUG}"', run=False)
@pytest.mark.parametrize(
"inp, exp",
[
('f"{}"', 'f"{}"'),
('f"$HOME"', 'f"$HOME"'),
('f"{0} - {1}"', 'f"{0} - {1}"'),
(
'f"{$HOME}"',
"f\"{__xonsh__.execer.eval(r'$HOME', glbs=globals(), locs=locals())}\"",
),
(
'f"{ $HOME }"',
"f\"{__xonsh__.execer.eval(r'$HOME ', glbs=globals(), locs=locals())}\"",
),
(
"f\"{'$HOME'}\"",
"f\"{__xonsh__.execer.eval(r'\\'$HOME\\'', glbs=globals(), locs=locals())}\"",
),
],
)
def test_eval_fstr_fields(inp, exp):
obs = eval_fstr_fields(inp, 'f"')
assert exp == obs
def test_raw_bytes_literal():
check_ast('br"hell\\o"')
check_ast('RB"hell\\o"')
check_ast('Br"hell\\o"')
check_ast('rB"hell\\o"')
def test_unary_plus():
check_ast("+1")
def test_unary_minus():
check_ast("-1")
def test_unary_invert():
check_ast("~1")
def test_binop_plus():
check_ast("42 + 65")
def test_binop_minus():
check_ast("42 - 65")
def test_binop_times():
check_ast("42 * 65")
@skip_if_py34
def test_binop_matmult():
check_ast("x @ y", False)
def test_binop_div():
check_ast("42 / 65")
def test_binop_mod():
check_ast("42 % 65")
def test_binop_floordiv():
check_ast("42 // 65")
def test_binop_pow():
check_ast("2 ** 2")
def test_plus_pow():
check_ast("42 + 2 ** 2")
def test_plus_plus():
check_ast("42 + 65 + 6")
def test_plus_minus():
check_ast("42 + 65 - 6")
def test_minus_plus():
check_ast("42 - 65 + 6")
def test_minus_minus():
check_ast("42 - 65 - 6")
def test_minus_plus_minus():
check_ast("42 - 65 + 6 - 28")
def test_times_plus():
check_ast("42 * 65 + 6")
def test_plus_times():
check_ast("42 + 65 * 6")
def test_times_times():
check_ast("42 * 65 * 6")
def test_times_div():
check_ast("42 * 65 / 6")
def test_times_div_mod():
check_ast("42 * 65 / 6 % 28")
def test_times_div_mod_floor():
check_ast("42 * 65 / 6 % 28 // 13")
def test_str_str():
check_ast("\"hello\" 'mom'")
def test_str_str_str():
check_ast('"hello" \'mom\' "wow"')
def test_str_plus_str():
check_ast("\"hello\" + 'mom'")
def test_str_times_int():
check_ast('"hello" * 20')
def test_int_times_str():
check_ast('2*"hello"')
def test_group_plus_times():
check_ast("(42 + 65) * 20")
def test_plus_group_times():
check_ast("42 + (65 * 20)")
def test_group():
check_ast("(42)")
def test_lt():
check_ast("42 < 65")
def test_gt():
check_ast("42 > 65")
def test_eq():
check_ast("42 == 65")
def test_le():
check_ast("42 <= 65")
def test_ge():
check_ast("42 >= 65")
def test_ne():
check_ast("42 != 65")
def test_in():
check_ast('"4" in "65"')
def test_is():
check_ast("42 is 65")
def test_not_in():
check_ast('"4" not in "65"')
def test_is_not():
check_ast("42 is not 65")
def test_lt_lt():
check_ast("42 < 65 < 105")
def test_lt_lt_lt():
check_ast("42 < 65 < 105 < 77")
def test_not():
check_ast("not 0")
def test_or():
check_ast("1 or 0")
def test_or_or():
check_ast("1 or 0 or 42")
def test_and():
check_ast("1 and 0")
def test_and_and():
check_ast("1 and 0 and 2")
def test_and_or():
check_ast("1 and 0 or 2")
def test_or_and():
check_ast("1 or 0 and 2")
def test_group_and_and():
check_ast("(1 and 0) and 2")
def test_group_and_or():
check_ast("(1 and 0) or 2")
def test_if_else_expr():
check_ast("42 if True else 65")
def test_if_else_expr_expr():
check_ast("42+5 if 1 == 2 else 65-5")
def test_str_idx():
check_ast('"hello"[0]')
def test_str_slice():
check_ast('"hello"[0:3]')
def test_str_step():
check_ast('"hello"[0:3:1]')
def test_str_slice_all():
check_ast('"hello"[:]')
def test_str_slice_upper():
check_ast('"hello"[5:]')
def test_str_slice_lower():
check_ast('"hello"[:3]')
def test_str_slice_other():
check_ast('"hello"[::2]')
def test_str_slice_lower_other():
check_ast('"hello"[:3:2]')
def test_str_slice_upper_other():
check_ast('"hello"[3::2]')
def test_str_2slice():
check_ast('"hello"[0:3,0:3]', False)
def test_str_2step():
check_ast('"hello"[0:3:1,0:4:2]', False)
def test_str_2slice_all():
check_ast('"hello"[:,:]', False)
def test_str_2slice_upper():
check_ast('"hello"[5:,5:]', False)
def test_str_2slice_lower():
check_ast('"hello"[:3,:3]', False)
def test_str_2slice_lowerupper():
check_ast('"hello"[5:,:3]', False)
def test_str_2slice_other():
check_ast('"hello"[::2,::2]', False)
def test_str_2slice_lower_other():
check_ast('"hello"[:3:2,:3:2]', False)
def test_str_2slice_upper_other():
check_ast('"hello"[3::2,3::2]', False)
def test_str_3slice():
check_ast('"hello"[0:3,0:3,0:3]', False)
def test_str_3step():
check_ast('"hello"[0:3:1,0:4:2,1:3:2]', False)
def test_str_3slice_all():
check_ast('"hello"[:,:,:]', False)
def test_str_3slice_upper():
check_ast('"hello"[5:,5:,5:]', False)
def test_str_3slice_lower():
check_ast('"hello"[:3,:3,:3]', False)
def test_str_3slice_lowerlowerupper():
check_ast('"hello"[:3,:3,:3]', False)
def test_str_3slice_lowerupperlower():
check_ast('"hello"[:3,5:,:3]', False)
def test_str_3slice_lowerupperupper():
check_ast('"hello"[:3,5:,5:]', False)
def test_str_3slice_upperlowerlower():
check_ast('"hello"[5:,5:,:3]', False)
def test_str_3slice_upperlowerupper():
check_ast('"hello"[5:,:3,5:]', False)
def test_str_3slice_upperupperlower():
check_ast('"hello"[5:,5:,:3]', False)
def test_str_3slice_other():
check_ast('"hello"[::2,::2,::2]', False)
def test_str_3slice_lower_other():
check_ast('"hello"[:3:2,:3:2,:3:2]', False)
def test_str_3slice_upper_other():
check_ast('"hello"[3::2,3::2,3::2]', False)
def test_str_slice_true():
check_ast('"hello"[0:3,True]', False)
def test_str_true_slice():
check_ast('"hello"[True,0:3]', False)
def test_list_empty():
check_ast("[]")
def test_list_one():
check_ast("[1]")
def test_list_one_comma():
check_ast("[1,]")
def test_list_two():
check_ast("[1, 42]")
def test_list_three():
check_ast("[1, 42, 65]")
def test_list_three_comma():
check_ast("[1, 42, 65,]")
def test_list_one_nested():
check_ast("[[1]]")
def test_list_list_four_nested():
check_ast("[[1], [2], [3], [4]]")
def test_list_tuple_three_nested():
check_ast("[(1,), (2,), (3,)]")
def test_list_set_tuple_three_nested():
check_ast("[{(1,)}, {(2,)}, {(3,)}]")
def test_list_tuple_one_nested():
check_ast("[(1,)]")
def test_tuple_tuple_one_nested():
check_ast("((1,),)")
def test_dict_list_one_nested():
check_ast("{1: [2]}")
def test_dict_list_one_nested_comma():
check_ast("{1: [2],}")
def test_dict_tuple_one_nested():
check_ast("{1: (2,)}")
def test_dict_tuple_one_nested_comma():
check_ast("{1: (2,),}")
def test_dict_list_two_nested():
check_ast("{1: [2], 3: [4]}")
def test_set_tuple_one_nested():
check_ast("{(1,)}")
def test_set_tuple_two_nested():
check_ast("{(1,), (2,)}")
def test_tuple_empty():
check_ast("()")
def test_tuple_one_bare():
check_ast("1,")
def test_tuple_two_bare():
check_ast("1, 42")
def test_tuple_three_bare():
check_ast("1, 42, 65")
def test_tuple_three_bare_comma():
check_ast("1, 42, 65,")
def test_tuple_one_comma():
check_ast("(1,)")
def test_tuple_two():
check_ast("(1, 42)")
def test_tuple_three():
check_ast("(1, 42, 65)")
def test_tuple_three_comma():
check_ast("(1, 42, 65,)")
def test_bare_tuple_of_tuples():
check_ast("(),")
check_ast("((),),(1,)")
check_ast("(),(),")
check_ast("[],")
check_ast("[],[]")
check_ast("[],()")
check_ast("(),[],")
check_ast("((),[()],)")
def test_set_one():
check_ast("{42}")
def test_set_one_comma():
check_ast("{42,}")
def test_set_two():
check_ast("{42, 65}")
def test_set_two_comma():
check_ast("{42, 65,}")
def test_set_three():
check_ast("{42, 65, 45}")
def test_dict_empty():
check_ast("{}")
def test_dict_one():
check_ast("{42: 65}")
def test_dict_one_comma():
check_ast("{42: 65,}")
def test_dict_two():
check_ast("{42: 65, 6: 28}")
def test_dict_two_comma():
check_ast("{42: 65, 6: 28,}")
def test_dict_three():
check_ast("{42: 65, 6: 28, 1: 2}")
@skip_if_py34
def test_dict_from_dict_two_xy():
check_ast('{"x": 1, **{"y": 2}}')
@skip_if_py34
def test_dict_from_dict_two_x_first():
check_ast('{"x": 1, **{"x": 2}}')
@skip_if_py34
def test_dict_from_dict_two_x_second():
check_ast('{**{"x": 2}, "x": 1}')
@skip_if_py34
def test_unpack_range_tuple():
check_stmts("*range(4),")
@skip_if_py34
def test_unpack_range_tuple_4():
check_stmts("*range(4), 4")
@skip_if_py34
def test_unpack_range_tuple_parens():
check_ast("(*range(4),)")
@skip_if_py34
def test_unpack_range_tuple_parens_4():
check_ast("(*range(4), 4)")
@skip_if_py34
def test_unpack_range_list():
check_ast("[*range(4)]")
@skip_if_py34
def test_unpack_range_list_4():
check_ast("[*range(4), 4]")
@skip_if_py34
def test_unpack_range_set():
check_ast("{*range(4)}")
@skip_if_py34
def test_unpack_range_set_4():
check_ast("{*range(4), 4}")
def test_true():
check_ast("True")
def test_false():
check_ast("False")
def test_none():
check_ast("None")
def test_elipssis():
check_ast("...")
def test_not_implemented_name():
check_ast("NotImplemented")
def test_genexpr():
check_ast('(x for x in "mom")')
def test_genexpr_if():
check_ast('(x for x in "mom" if True)')
def test_genexpr_if_and():
check_ast('(x for x in "mom" if True and x == "m")')
def test_dbl_genexpr():
check_ast('(x+y for x in "mom" for y in "dad")')
def test_genexpr_if_genexpr():
check_ast('(x+y for x in "mom" if True for y in "dad")')
def test_genexpr_if_genexpr_if():
check_ast('(x+y for x in "mom" if True for y in "dad" if y == "d")')
def test_listcomp():
check_ast('[x for x in "mom"]')
def test_listcomp_if():
check_ast('[x for x in "mom" if True]')
def test_listcomp_if_and():
check_ast('[x for x in "mom" if True and x == "m"]')
def test_dbl_listcomp():
check_ast('[x+y for x in "mom" for y in "dad"]')
def test_listcomp_if_listcomp():
check_ast('[x+y for x in "mom" if True for y in "dad"]')
def test_listcomp_if_listcomp_if():
check_ast('[x+y for x in "mom" if True for y in "dad" if y == "d"]')
def test_setcomp():
check_ast('{x for x in "mom"}')
def test_setcomp_if():
check_ast('{x for x in "mom" if True}')
def test_setcomp_if_and():
check_ast('{x for x in "mom" if True and x == "m"}')
def test_dbl_setcomp():
check_ast('{x+y for x in "mom" for y in "dad"}')
def test_setcomp_if_setcomp():
check_ast('{x+y for x in "mom" if True for y in "dad"}')
def test_setcomp_if_setcomp_if():
check_ast('{x+y for x in "mom" if True for y in "dad" if y == "d"}')
def test_dictcomp():
check_ast('{x: x for x in "mom"}')
def test_dictcomp_unpack_parens():
check_ast('{k: v for (k, v) in {"x": 42}.items()}')
def test_dictcomp_unpack_no_parens():
check_ast('{k: v for k, v in {"x": 42}.items()}')
def test_dictcomp_if():
check_ast('{x: x for x in "mom" if True}')
def test_dictcomp_if_and():
check_ast('{x: x for x in "mom" if True and x == "m"}')
def test_dbl_dictcomp():
check_ast('{x: y for x in "mom" for y in "dad"}')
def test_dictcomp_if_dictcomp():
check_ast('{x: y for x in "mom" if True for y in "dad"}')
def test_dictcomp_if_dictcomp_if():
check_ast('{x: y for x in "mom" if True for y in "dad" if y == "d"}')
def test_lambda():
check_ast("lambda: 42")
def test_lambda_x():
check_ast("lambda x: x")
def test_lambda_kwx():
check_ast("lambda x=42: x")
def test_lambda_x_y():
check_ast("lambda x, y: x")
def test_lambda_x_y_z():
check_ast("lambda x, y, z: x")
def test_lambda_x_kwy():
check_ast("lambda x, y=42: x")
def test_lambda_kwx_kwy():
check_ast("lambda x=65, y=42: x")
def test_lambda_kwx_kwy_kwz():
check_ast("lambda x=65, y=42, z=1: x")
def test_lambda_x_comma():
check_ast("lambda x,: x")
def test_lambda_x_y_comma():
check_ast("lambda x, y,: x")
def test_lambda_x_y_z_comma():
check_ast("lambda x, y, z,: x")
def test_lambda_x_kwy_comma():
check_ast("lambda x, y=42,: x")
def test_lambda_kwx_kwy_comma():
check_ast("lambda x=65, y=42,: x")
def test_lambda_kwx_kwy_kwz_comma():
check_ast("lambda x=65, y=42, z=1,: x")
def test_lambda_args():
check_ast("lambda *args: 42")
def test_lambda_args_x():
check_ast("lambda *args, x: 42")
def test_lambda_args_x_y():
check_ast("lambda *args, x, y: 42")
def test_lambda_args_x_kwy():
check_ast("lambda *args, x, y=10: 42")
def test_lambda_args_kwx_y():
check_ast("lambda *args, x=10, y: 42")
def test_lambda_args_kwx_kwy():
check_ast("lambda *args, x=42, y=65: 42")
def test_lambda_x_args():
check_ast("lambda x, *args: 42")
def test_lambda_x_args_y():
check_ast("lambda x, *args, y: 42")
def test_lambda_x_args_y_z():
check_ast("lambda x, *args, y, z: 42")
def test_lambda_kwargs():
check_ast("lambda **kwargs: 42")
def test_lambda_x_kwargs():
check_ast("lambda x, **kwargs: 42")
def test_lambda_x_y_kwargs():
check_ast("lambda x, y, **kwargs: 42")
def test_lambda_x_kwy_kwargs():
check_ast("lambda x, y=42, **kwargs: 42")
def test_lambda_args_kwargs():
check_ast("lambda *args, **kwargs: 42")
def test_lambda_x_args_kwargs():
check_ast("lambda x, *args, **kwargs: 42")
def test_lambda_x_y_args_kwargs():
check_ast("lambda x, y, *args, **kwargs: 42")
def test_lambda_kwx_args_kwargs():
check_ast("lambda x=10, *args, **kwargs: 42")
def test_lambda_x_kwy_args_kwargs():
check_ast("lambda x, y=42, *args, **kwargs: 42")
def test_lambda_x_args_y_kwargs():
check_ast("lambda x, *args, y, **kwargs: 42")
def test_lambda_x_args_kwy_kwargs():
check_ast("lambda x, *args, y=42, **kwargs: 42")
def test_lambda_args_y_kwargs():