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Disable hypothesis on 2.6.9
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rocky
@@ -1,150 +1,154 @@
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# std
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import os
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# test
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import pytest
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import hypothesis
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from hypothesis import strategies as st
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# uncompyle6
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from uncompyle6 import PYTHON_VERSION, deparse_code
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import pytest
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pytestmark = pytest.mark.skipif(PYTHON_VERSION <= 2.6,
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reason='hypothesis needs 2.7 or later')
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if PYTHON_VERSION > 2.6:
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import hypothesis
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from hypothesis import strategies as st
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# uncompyle6
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@st.composite
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def expressions(draw):
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# todo : would be nice to generate expressions using hypothesis however
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# this is pretty involved so for now just use a corpus of expressions
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# from which to select.
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return draw(st.sampled_from((
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'abc',
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'len(items)',
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'x + 1',
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'lineno',
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'container',
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'self.attribute',
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'self.method()',
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# These expressions are failing, I think these are control
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# flow problems rather than problems with FORMAT_VALUE,
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# however I need to confirm this...
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#'sorted(items, key=lambda x: x.name)',
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#'func(*args, **kwargs)',
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#'text or default',
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#'43 if life_the_universe and everything else None'
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)))
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@st.composite
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def expressions(draw):
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# todo : would be nice to generate expressions using hypothesis however
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# this is pretty involved so for now just use a corpus of expressions
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# from which to select.
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return draw(st.sampled_from((
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'abc',
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'len(items)',
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'x + 1',
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'lineno',
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'container',
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'self.attribute',
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'self.method()',
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# These expressions are failing, I think these are control
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# flow problems rather than problems with FORMAT_VALUE,
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# however I need to confirm this...
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#'sorted(items, key=lambda x: x.name)',
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#'func(*args, **kwargs)',
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#'text or default',
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#'43 if life_the_universe and everything else None'
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)))
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@st.composite
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def format_specifiers(draw):
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"""
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Generate a valid format specifier using the rules:
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@st.composite
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def format_specifiers(draw):
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"""
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Generate a valid format specifier using the rules:
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format_spec ::= [[fill]align][sign][#][0][width][,][.precision][type]
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fill ::= <any character>
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align ::= "<" | ">" | "=" | "^"
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sign ::= "+" | "-" | " "
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width ::= integer
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precision ::= integer
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type ::= "b" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" | "n" | "o" | "s" | "x" | "X" | "%"
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format_spec ::= [[fill]align][sign][#][0][width][,][.precision][type]
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fill ::= <any character>
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align ::= "<" | ">" | "=" | "^"
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sign ::= "+" | "-" | " "
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width ::= integer
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precision ::= integer
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type ::= "b" | "c" | "d" | "e" | "E" | "f" | "F" | "g" | "G" | "n" | "o" | "s" | "x" | "X" | "%"
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See https://docs.python.org/2/library/string.html
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See https://docs.python.org/2/library/string.html
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:param draw: Let hypothesis draw from other strategies.
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:param draw: Let hypothesis draw from other strategies.
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:return: An example format_specifier.
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"""
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alphabet_strategy = st.characters(min_codepoint=ord('a'), max_codepoint=ord('z'))
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fill = draw(st.one_of(alphabet_strategy, st.none()))
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align = draw(st.sampled_from(list('<>=^')))
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fill_align = (fill + align or '') if fill else ''
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:return: An example format_specifier.
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"""
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alphabet_strategy = st.characters(min_codepoint=ord('a'), max_codepoint=ord('z'))
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fill = draw(st.one_of(alphabet_strategy, st.none()))
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align = draw(st.sampled_from(list('<>=^')))
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fill_align = (fill + align or '') if fill else ''
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type_ = draw(st.sampled_from('bcdeEfFgGnosxX%'))
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can_have_sign = type_ in 'deEfFgGnoxX%'
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can_have_comma = type_ in 'deEfFgG%'
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can_have_precision = type_ in 'fFgG'
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can_have_pound = type_ in 'boxX%'
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can_have_zero = type_ in 'oxX'
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type_ = draw(st.sampled_from('bcdeEfFgGnosxX%'))
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can_have_sign = type_ in 'deEfFgGnoxX%'
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can_have_comma = type_ in 'deEfFgG%'
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can_have_precision = type_ in 'fFgG'
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can_have_pound = type_ in 'boxX%'
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can_have_zero = type_ in 'oxX'
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sign = draw(st.sampled_from(list('+- ') + [''])) if can_have_sign else ''
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pound = draw(st.sampled_from(('#', '',))) if can_have_pound else ''
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zero = draw(st.sampled_from(('0', '',))) if can_have_zero else ''
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sign = draw(st.sampled_from(list('+- ') + [''])) if can_have_sign else ''
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pound = draw(st.sampled_from(('#', '',))) if can_have_pound else ''
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zero = draw(st.sampled_from(('0', '',))) if can_have_zero else ''
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int_strategy = st.integers(min_value=1, max_value=1000)
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int_strategy = st.integers(min_value=1, max_value=1000)
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width = draw(st.one_of(int_strategy, st.none()))
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width = str(width) if width is not None else ''
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width = draw(st.one_of(int_strategy, st.none()))
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width = str(width) if width is not None else ''
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comma = draw(st.sampled_from((',', '',))) if can_have_comma else ''
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if can_have_precision:
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precision = draw(st.one_of(int_strategy, st.none()))
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precision = '.' + str(precision) if precision else ''
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else:
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precision = ''
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comma = draw(st.sampled_from((',', '',))) if can_have_comma else ''
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if can_have_precision:
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precision = draw(st.one_of(int_strategy, st.none()))
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precision = '.' + str(precision) if precision else ''
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else:
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precision = ''
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return ''.join((fill_align, sign, pound, zero, width, comma, precision, type_,))
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return ''.join((fill_align, sign, pound, zero, width, comma, precision, type_,))
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@st.composite
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def fstrings(draw):
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"""
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Generate a valid f-string.
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See https://www.python.org/dev/peps/pep-0498/#specification
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@st.composite
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def fstrings(draw):
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"""
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Generate a valid f-string.
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See https://www.python.org/dev/peps/pep-0498/#specification
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:param draw: Let hypothsis draw from other strategies.
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:param draw: Let hypothsis draw from other strategies.
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:return: A valid f-string.
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"""
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character_strategy = st.characters(
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blacklist_characters='\r\n\'\\s{}',
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min_codepoint=1,
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max_codepoint=1000,
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)
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is_raw = draw(st.booleans())
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integer_strategy = st.integers(min_value=0, max_value=3)
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expression_count = draw(integer_strategy)
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content = []
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for _ in range(expression_count):
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expression = draw(expressions())
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conversion = draw(st.sampled_from(('', '!s', '!r', '!a',)))
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has_specifier = draw(st.booleans())
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specifier = ':' + draw(format_specifiers()) if has_specifier else ''
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content.append('{{{}{}}}'.format(expression, conversion, specifier))
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content.append(draw(st.text(character_strategy)))
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content = ''.join(content)
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return "f{}'{}'".format('r' if is_raw else '', content)
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:return: A valid f-string.
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"""
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character_strategy = st.characters(
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blacklist_characters='\r\n\'\\s{}',
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min_codepoint=1,
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max_codepoint=1000,
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)
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is_raw = draw(st.booleans())
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integer_strategy = st.integers(min_value=0, max_value=3)
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expression_count = draw(integer_strategy)
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content = []
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for _ in range(expression_count):
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expression = draw(expressions())
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conversion = draw(st.sampled_from(('', '!s', '!r', '!a',)))
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has_specifier = draw(st.booleans())
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specifier = ':' + draw(format_specifiers()) if has_specifier else ''
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content.append('{{{}{}}}'.format(expression, conversion, specifier))
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content.append(draw(st.text(character_strategy)))
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content = ''.join(content)
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return "f{}'{}'".format('r' if is_raw else '', content)
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@hypothesis.given(format_specifiers())
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def test_format_specifiers(format_specifier):
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"""Verify that format_specifiers generates valid specifiers"""
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try:
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exec('"{:' + format_specifier + '}".format(0)')
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except ValueError as e:
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if 'Unknown format code' not in str(e):
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raise
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@hypothesis.given(format_specifiers())
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def test_format_specifiers(format_specifier):
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"""Verify that format_specifiers generates valid specifiers"""
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try:
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exec('"{:' + format_specifier + '}".format(0)')
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except ValueError as e:
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if 'Unknown format code' not in str(e):
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raise
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def run_test(text):
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hypothesis.assume(len(text))
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hypothesis.assume("f'{" in text)
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expr = text + '\n'
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code = compile(expr, '<string>', 'single')
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deparsed = deparse_code(PYTHON_VERSION, code, compile_mode='single')
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recompiled = compile(deparsed.text, '<string>', 'single')
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if recompiled != code:
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assert 'dis(' + deparsed.text.strip('\n') + ')' == 'dis(' + expr.strip('\n') + ')'
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def run_test(text):
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hypothesis.assume(len(text))
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hypothesis.assume("f'{" in text)
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expr = text + '\n'
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code = compile(expr, '<string>', 'single')
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deparsed = deparse_code(PYTHON_VERSION, code, compile_mode='single')
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recompiled = compile(deparsed.text, '<string>', 'single')
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if recompiled != code:
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assert 'dis(' + deparsed.text.strip('\n') + ')' == 'dis(' + expr.strip('\n') + ')'
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@hypothesis.given(fstrings())
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def test_uncompyle_fstring(fstring):
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"""Verify uncompyling fstring bytecode"""
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run_test(fstring)
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@hypothesis.given(fstrings())
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def test_uncompyle_fstring(fstring):
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"""Verify uncompyling fstring bytecode"""
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run_test(fstring)
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@pytest.mark.parametrize('fstring', [
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"f'{abc}{abc!s}'",
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"f'{abc}0'",
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])
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def test_uncompyle_direct(fstring):
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"""useful for debugging"""
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run_test(fstring)
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@pytest.mark.skipif(PYTHON_VERSION < 3.6, reason='need at least python 3.6')
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@pytest.mark.parametrize('fstring', [
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"f'{abc}{abc!s}'",
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"f'{abc}0'",
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])
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def test_uncompyle_direct(fstring):
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"""useful for debugging"""
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run_test(fstring)
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