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import sys
import textwrap
from pyflakes import messages as m
from pyflakes.checker import (
PYPY,
DoctestScope,
FunctionScope,
ModuleScope,
)
from pyflakes.test.test_other import Test as TestOther
from pyflakes.test.test_imports import Test as TestImports
from pyflakes.test.test_undefined_names import Test as TestUndefinedNames
from pyflakes.test.harness import TestCase, skip
class _DoctestMixin:
withDoctest = True
def doctestify(self, input):
lines = []
for line in textwrap.dedent(input).splitlines():
if line.strip() == '':
pass
elif (line.startswith(' ') or
line.startswith('except:') or
line.startswith('except ') or
line.startswith('finally:') or
line.startswith('else:') or
line.startswith('elif ') or
(lines and lines[-1].startswith(('>>> @', '... @')))):
line = "... %s" % line
else:
line = ">>> %s" % line
lines.append(line)
doctestificator = textwrap.dedent('''\
def doctest_something():
"""
%s
"""
''')
return doctestificator % "\n ".join(lines)
def flakes(self, input, *args, **kw):
return super().flakes(self.doctestify(input), *args, **kw)
class Test(TestCase):
withDoctest = True
def test_scope_class(self):
"""Check that a doctest is given a DoctestScope."""
checker = self.flakes("""
m = None
def doctest_stuff():
'''
>>> d = doctest_stuff()
'''
f = m
return f
""")
scopes = checker.deadScopes
module_scopes = [
scope for scope in scopes if scope.__class__ is ModuleScope]
doctest_scopes = [
scope for scope in scopes if scope.__class__ is DoctestScope]
function_scopes = [
scope for scope in scopes if scope.__class__ is FunctionScope]
self.assertEqual(len(module_scopes), 1)
self.assertEqual(len(doctest_scopes), 1)
module_scope = module_scopes[0]
doctest_scope = doctest_scopes[0]
self.assertIsInstance(doctest_scope, DoctestScope)
self.assertIsInstance(doctest_scope, ModuleScope)
self.assertNotIsInstance(doctest_scope, FunctionScope)
self.assertNotIsInstance(module_scope, DoctestScope)
self.assertIn('m', module_scope)
self.assertIn('doctest_stuff', module_scope)
self.assertIn('d', doctest_scope)
self.assertEqual(len(function_scopes), 1)
self.assertIn('f', function_scopes[0])
def test_nested_doctest_ignored(self):
"""Check that nested doctests are ignored."""
checker = self.flakes("""
m = None
def doctest_stuff():
'''
>>> def function_in_doctest():
... \"\"\"
... >>> ignored_undefined_name
... \"\"\"
... df = m
... return df
...
>>> function_in_doctest()
'''
f = m
return f
""")
scopes = checker.deadScopes
module_scopes = [
scope for scope in scopes if scope.__class__ is ModuleScope]
doctest_scopes = [
scope for scope in scopes if scope.__class__ is DoctestScope]
function_scopes = [
scope for scope in scopes if scope.__class__ is FunctionScope]
self.assertEqual(len(module_scopes), 1)
self.assertEqual(len(doctest_scopes), 1)
module_scope = module_scopes[0]
doctest_scope = doctest_scopes[0]
self.assertIn('m', module_scope)
self.assertIn('doctest_stuff', module_scope)
self.assertIn('function_in_doctest', doctest_scope)
self.assertEqual(len(function_scopes), 2)
self.assertIn('f', function_scopes[0])
self.assertIn('df', function_scopes[1])
def test_global_module_scope_pollution(self):
"""Check that global in doctest does not pollute module scope."""
checker = self.flakes("""
def doctest_stuff():
'''
>>> def function_in_doctest():
... global m
... m = 50
... df = 10
... m = df
...
>>> function_in_doctest()
'''
f = 10
return f
""")
scopes = checker.deadScopes
module_scopes = [
scope for scope in scopes if scope.__class__ is ModuleScope]
doctest_scopes = [
scope for scope in scopes if scope.__class__ is DoctestScope]
function_scopes = [
scope for scope in scopes if scope.__class__ is FunctionScope]
self.assertEqual(len(module_scopes), 1)
self.assertEqual(len(doctest_scopes), 1)
module_scope = module_scopes[0]
doctest_scope = doctest_scopes[0]
self.assertIn('doctest_stuff', module_scope)
self.assertIn('function_in_doctest', doctest_scope)
self.assertEqual(len(function_scopes), 2)
self.assertIn('f', function_scopes[0])
self.assertIn('df', function_scopes[1])
self.assertIn('m', function_scopes[1])
self.assertNotIn('m', module_scope)
def test_global_undefined(self):
self.flakes("""
global m
def doctest_stuff():
'''
>>> m
'''
""", m.UndefinedName)
def test_nested_class(self):
"""Doctest within nested class are processed."""
self.flakes("""
class C:
class D:
'''
>>> m
'''
def doctest_stuff(self):
'''
>>> m
'''
return 1
""", m.UndefinedName, m.UndefinedName)
def test_ignore_nested_function(self):
"""Doctest module does not process doctest in nested functions."""
# 'syntax error' would cause a SyntaxError if the doctest was processed.
# However doctest does not find doctest in nested functions
# (https://bugs.python.org/issue1650090). If nested functions were
# processed, this use of m should cause UndefinedName, and the
# name inner_function should probably exist in the doctest scope.
self.flakes("""
def doctest_stuff():
def inner_function():
'''
>>> syntax error
>>> inner_function()
1
>>> m
'''
return 1
m = inner_function()
return m
""")
def test_inaccessible_scope_class(self):
"""Doctest may not access class scope."""
self.flakes("""
class C:
def doctest_stuff(self):
'''
>>> m
'''
return 1
m = 1
""", m.UndefinedName)
def test_importBeforeDoctest(self):
self.flakes("""
import foo
def doctest_stuff():
'''
>>> foo
'''
""")
@skip("todo")
def test_importBeforeAndInDoctest(self):
self.flakes('''
import foo
def doctest_stuff():
"""
>>> import foo
>>> foo
"""
foo
''', m.RedefinedWhileUnused)
def test_importInDoctestAndAfter(self):
self.flakes('''
def doctest_stuff():
"""
>>> import foo
>>> foo
"""
import foo
foo()
''')
def test_offsetInDoctests(self):
exc = self.flakes('''
def doctest_stuff():
"""
>>> x # line 5
"""
''', m.UndefinedName).messages[0]
self.assertEqual(exc.lineno, 5)
self.assertEqual(exc.col, 12)
def test_offsetInLambdasInDoctests(self):
exc = self.flakes('''
def doctest_stuff():
"""
>>> lambda: x # line 5
"""
''', m.UndefinedName).messages[0]
self.assertEqual(exc.lineno, 5)
self.assertEqual(exc.col, 20)
def test_offsetAfterDoctests(self):
exc = self.flakes('''
def doctest_stuff():
"""
>>> x = 5
"""
x
''', m.UndefinedName).messages[0]
self.assertEqual(exc.lineno, 8)
self.assertEqual(exc.col, 0)
def test_syntaxErrorInDoctest(self):
exceptions = self.flakes(
'''
def doctest_stuff():
"""
>>> from # line 4
>>> fortytwo = 42
>>> except Exception:
"""
''',
m.DoctestSyntaxError,
m.DoctestSyntaxError,
m.DoctestSyntaxError).messages
exc = exceptions[0]
self.assertEqual(exc.lineno, 4)
if not PYPY and sys.version_info >= (3, 8):
self.assertEqual(exc.col, 18)
else:
self.assertEqual(exc.col, 26)
# PyPy error column offset is 0,
# for the second and third line of the doctest
# i.e. at the beginning of the line
exc = exceptions[1]
self.assertEqual(exc.lineno, 5)
if PYPY:
self.assertEqual(exc.col, 13)
else:
self.assertEqual(exc.col, 16)
exc = exceptions[2]
self.assertEqual(exc.lineno, 6)
if PYPY or sys.version_info >= (3, 8):
self.assertEqual(exc.col, 13)
else:
self.assertEqual(exc.col, 18)
def test_indentationErrorInDoctest(self):
exc = self.flakes('''
def doctest_stuff():
"""
>>> if True:
... pass
"""
''', m.DoctestSyntaxError).messages[0]
self.assertEqual(exc.lineno, 5)
if PYPY or sys.version_info >= (3, 8):
self.assertEqual(exc.col, 13)
else:
self.assertEqual(exc.col, 16)
def test_offsetWithMultiLineArgs(self):
(exc1, exc2) = self.flakes(
'''
def doctest_stuff(arg1,
arg2,
arg3):
"""
>>> assert
>>> this
"""
''',
m.DoctestSyntaxError,
m.UndefinedName).messages
self.assertEqual(exc1.lineno, 6)
self.assertEqual(exc1.col, 19)
self.assertEqual(exc2.lineno, 7)
self.assertEqual(exc2.col, 12)
def test_doctestCanReferToFunction(self):
self.flakes("""
def foo():
'''
>>> foo
'''
""")
def test_doctestCanReferToClass(self):
self.flakes("""
class Foo():
'''
>>> Foo
'''
def bar(self):
'''
>>> Foo
'''
""")
def test_noOffsetSyntaxErrorInDoctest(self):
exceptions = self.flakes(
'''
def buildurl(base, *args, **kwargs):
"""
>>> buildurl('/blah.php', ('a', '&'), ('b', '=')
'/blah.php?a=%26&b=%3D'
>>> buildurl('/blah.php', a='&', 'b'='=')
'/blah.php?b=%3D&a=%26'
"""
pass
''',
m.DoctestSyntaxError,
m.DoctestSyntaxError).messages
exc = exceptions[0]
self.assertEqual(exc.lineno, 4)
exc = exceptions[1]
self.assertEqual(exc.lineno, 6)
def test_singleUnderscoreInDoctest(self):
self.flakes('''
def func():
"""A docstring
>>> func()
1
>>> _
1
"""
return 1
''')
def test_globalUnderscoreInDoctest(self):
self.flakes("""
from gettext import ugettext as _
def doctest_stuff():
'''
>>> pass
'''
""", m.UnusedImport)
class TestOther(_DoctestMixin, TestOther):
"""Run TestOther with each test wrapped in a doctest."""
class TestImports(_DoctestMixin, TestImports):
"""Run TestImports with each test wrapped in a doctest."""
class TestUndefinedNames(_DoctestMixin, TestUndefinedNames):
"""Run TestUndefinedNames with each test wrapped in a doctest."""
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