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test_expected_output.py
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test_expected_output.py
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# This file is part of Hypothesis, which may be found at
# https://github.com/HypothesisWorks/hypothesis/
#
# Copyright the Hypothesis Authors.
# Individual contributors are listed in AUTHORS.rst and the git log.
#
# This Source Code Form is subject to the terms of the Mozilla Public License,
# v. 2.0. If a copy of the MPL was not distributed with this file, You can
# obtain one at https://mozilla.org/MPL/2.0/.
"""
'Golden master' tests for the ghostwriter.
To update the recorded outputs, run `pytest --hypothesis-update-outputs ...`.
"""
import ast
import base64
import builtins
import operator
import pathlib
import re
import sys
from typing import Optional, Sequence, Union
import numpy
import pytest
from example_code.future_annotations import add_custom_classes, merge_dicts
import hypothesis
from hypothesis.extra import ghostwriter
from hypothesis.utils.conventions import not_set
@pytest.fixture
def update_recorded_outputs(request):
return request.config.getoption("--hypothesis-update-outputs")
def get_recorded(name, actual=""):
file_ = pathlib.Path(__file__).parent / "recorded" / f"{name}.txt"
if actual:
file_.write_text(actual)
return file_.read_text()
def timsort(seq: Sequence[int]) -> Sequence[int]:
return sorted(seq)
def with_docstring(a, b, c, d=int, e=lambda x: f"xx{x}xx") -> None:
"""Demonstrates parsing params from the docstring
:param a: sphinx docstring style
:type a: sequence of integers
b (list, tuple, or None): Google docstring style
c : {"foo", "bar", or None}
Numpy docstring style
"""
class A_Class:
@classmethod
def a_classmethod(cls, arg: int):
pass
@staticmethod
def a_staticmethod(arg: int):
pass
def add(a: float, b: float) -> float:
return a + b
def divide(a: int, b: int) -> float:
"""This is a RST-style docstring for `divide`.
:raises ZeroDivisionError: if b == 0
"""
return a / b
def optional_parameter(a: float, b: Optional[float]) -> float:
return optional_union_parameter(a, b)
def optional_union_parameter(a: float, b: Optional[Union[float, int]]) -> float:
return a if b is None else a + b
if sys.version_info[:2] >= (3, 10):
def union_sequence_parameter(items: Sequence[float | int]) -> float:
return sum(items)
else:
def union_sequence_parameter(items: Sequence[Union[float, int]]) -> float:
return sum(items)
# Note: for some of the `expected` outputs, we replace away some small
# parts which vary between minor versions of Python.
@pytest.mark.parametrize(
"data",
[
("fuzz_sorted", ghostwriter.fuzz(sorted)),
("fuzz_sorted_with_annotations", ghostwriter.fuzz(sorted, annotate=True)),
("fuzz_with_docstring", ghostwriter.fuzz(with_docstring)),
("fuzz_classmethod", ghostwriter.fuzz(A_Class.a_classmethod)),
("fuzz_staticmethod", ghostwriter.fuzz(A_Class.a_staticmethod)),
("fuzz_ufunc", ghostwriter.fuzz(numpy.add)),
("magic_gufunc", ghostwriter.magic(numpy.matmul)),
pytest.param(
("optional_parameter", ghostwriter.magic(optional_parameter)),
marks=pytest.mark.skipif("sys.version_info[:2] < (3, 9)"),
),
pytest.param(
("optional_parameter_pre_py_3_9", ghostwriter.magic(optional_parameter)),
marks=pytest.mark.skipif("sys.version_info[:2] >= (3, 9)"),
),
("optional_union_parameter", ghostwriter.magic(optional_union_parameter)),
("union_sequence_parameter", ghostwriter.magic(union_sequence_parameter)),
pytest.param(
("add_custom_classes", ghostwriter.magic(add_custom_classes)),
marks=pytest.mark.skipif("sys.version_info[:2] < (3, 10)"),
),
pytest.param(
("merge_dicts", ghostwriter.magic(merge_dicts)),
marks=pytest.mark.skipif("sys.version_info[:2] < (3, 10)"),
),
("magic_base64_roundtrip", ghostwriter.magic(base64.b64encode)),
(
"magic_base64_roundtrip_with_annotations",
ghostwriter.magic(base64.b64encode, annotate=True),
),
("re_compile", ghostwriter.fuzz(re.compile)),
(
"re_compile_except",
ghostwriter.fuzz(re.compile, except_=re.error)
# re.error fixed it's __module__ in Python 3.7
.replace("import sre_constants\n", "").replace("sre_constants.", "re."),
),
("re_compile_unittest", ghostwriter.fuzz(re.compile, style="unittest")),
pytest.param(
("base64_magic", ghostwriter.magic(base64)),
marks=pytest.mark.skipif("sys.version_info[:2] >= (3, 10)"),
),
("sorted_idempotent", ghostwriter.idempotent(sorted)),
("timsort_idempotent", ghostwriter.idempotent(timsort)),
(
"timsort_idempotent_asserts",
ghostwriter.idempotent(timsort, except_=AssertionError),
),
("eval_equivalent", ghostwriter.equivalent(eval, ast.literal_eval)),
("sorted_self_equivalent", ghostwriter.equivalent(sorted, sorted, sorted)),
(
"sorted_self_equivalent_with_annotations",
ghostwriter.equivalent(sorted, sorted, sorted, annotate=True),
),
("addition_op_magic", ghostwriter.magic(add)),
("addition_op_multimagic", ghostwriter.magic(add, operator.add, numpy.add)),
("division_fuzz_error_handler", ghostwriter.fuzz(divide)),
(
"division_binop_error_handler",
ghostwriter.binary_operation(divide, identity=1),
),
(
"division_roundtrip_error_handler",
ghostwriter.roundtrip(divide, operator.mul),
),
(
"division_roundtrip_error_handler_without_annotations",
ghostwriter.roundtrip(divide, operator.mul, annotate=False),
),
(
"division_roundtrip_arithmeticerror_handler",
ghostwriter.roundtrip(divide, operator.mul, except_=ArithmeticError),
),
(
"division_roundtrip_typeerror_handler",
ghostwriter.roundtrip(divide, operator.mul, except_=TypeError),
),
(
"division_operator",
ghostwriter.binary_operation(
operator.truediv, associative=False, commutative=False
),
),
(
"division_operator_with_annotations",
ghostwriter.binary_operation(
operator.truediv, associative=False, commutative=False, annotate=True
),
),
(
"multiplication_operator",
ghostwriter.binary_operation(
operator.mul, identity=1, distributes_over=operator.add
),
),
(
"multiplication_operator_unittest",
ghostwriter.binary_operation(
operator.mul,
identity=1,
distributes_over=operator.add,
style="unittest",
),
),
(
"sorted_self_error_equivalent_simple",
ghostwriter.equivalent(sorted, sorted, allow_same_errors=True),
),
(
"sorted_self_error_equivalent_threefuncs",
ghostwriter.equivalent(sorted, sorted, sorted, allow_same_errors=True),
),
(
"sorted_self_error_equivalent_1error",
ghostwriter.equivalent(
sorted,
sorted,
allow_same_errors=True,
except_=ValueError,
),
),
(
"sorted_self_error_equivalent_2error_unittest",
ghostwriter.equivalent(
sorted,
sorted,
allow_same_errors=True,
except_=(TypeError, ValueError),
style="unittest",
),
),
("magic_class", ghostwriter.magic(A_Class)),
pytest.param(
("magic_builtins", ghostwriter.magic(builtins)),
marks=[
pytest.mark.skipif(
sys.version_info[:2] not in [(3, 8), (3, 9)],
reason="compile arg new in 3.8, aiter and anext new in 3.10",
)
],
),
],
ids=lambda x: x[0],
)
def test_ghostwriter_example_outputs(update_recorded_outputs, data):
name, actual = data
expected = get_recorded(name, actual * update_recorded_outputs)
assert actual == expected # We got the expected source code
exec(expected, {}) # and there are no SyntaxError or NameErrors
def test_ghostwriter_on_hypothesis(update_recorded_outputs):
actual = ghostwriter.magic(hypothesis).replace("Strategy[+Ex]", "Strategy")
expected = get_recorded("hypothesis_module_magic", actual * update_recorded_outputs)
if sys.version_info[:2] < (3, 10):
assert actual == expected
exec(expected, {"not_set": not_set})