261 lines
9.4 KiB
Python
261 lines
9.4 KiB
Python
""" discover and run doctests in modules and test files."""
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from __future__ import absolute_import
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import traceback
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import pytest, py
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from _pytest.python import FixtureRequest
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from py._code.code import TerminalRepr, ReprFileLocation
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def pytest_addoption(parser):
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parser.addini('doctest_optionflags', 'option flags for doctests',
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type="args", default=["ELLIPSIS"])
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group = parser.getgroup("collect")
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group.addoption("--doctest-modules",
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action="store_true", default=False,
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help="run doctests in all .py modules",
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dest="doctestmodules")
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group.addoption("--doctest-glob",
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action="store", default="test*.txt", metavar="pat",
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help="doctests file matching pattern, default: test*.txt",
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dest="doctestglob")
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group.addoption("--doctest-ignore-import-errors",
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action="store_true", default=False,
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help="ignore doctest ImportErrors",
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dest="doctest_ignore_import_errors")
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def pytest_collect_file(path, parent):
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config = parent.config
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if path.ext == ".py":
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if config.option.doctestmodules:
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return DoctestModule(path, parent)
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elif (path.ext in ('.txt', '.rst') and parent.session.isinitpath(path)) or \
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path.check(fnmatch=config.getvalue("doctestglob")):
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return DoctestTextfile(path, parent)
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class ReprFailDoctest(TerminalRepr):
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def __init__(self, reprlocation, lines):
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self.reprlocation = reprlocation
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self.lines = lines
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def toterminal(self, tw):
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for line in self.lines:
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tw.line(line)
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self.reprlocation.toterminal(tw)
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class DoctestItem(pytest.Item):
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def __init__(self, name, parent, runner=None, dtest=None):
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super(DoctestItem, self).__init__(name, parent)
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self.runner = runner
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self.dtest = dtest
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self.obj = None
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self.fixture_request = None
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def setup(self):
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if self.dtest is not None:
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self.fixture_request = _setup_fixtures(self)
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globs = dict(getfixture=self.fixture_request.getfuncargvalue)
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self.dtest.globs.update(globs)
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def runtest(self):
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_check_all_skipped(self.dtest)
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self.runner.run(self.dtest)
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def repr_failure(self, excinfo):
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import doctest
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if excinfo.errisinstance((doctest.DocTestFailure,
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doctest.UnexpectedException)):
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doctestfailure = excinfo.value
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example = doctestfailure.example
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test = doctestfailure.test
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filename = test.filename
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if test.lineno is None:
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lineno = None
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else:
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lineno = test.lineno + example.lineno + 1
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message = excinfo.type.__name__
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reprlocation = ReprFileLocation(filename, lineno, message)
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checker = _get_unicode_checker()
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REPORT_UDIFF = doctest.REPORT_UDIFF
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filelines = py.path.local(filename).readlines(cr=0)
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lines = []
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if lineno is not None:
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i = max(test.lineno, max(0, lineno - 10)) # XXX?
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for line in filelines[i:lineno]:
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lines.append("%03d %s" % (i+1, line))
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i += 1
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else:
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lines.append('EXAMPLE LOCATION UNKNOWN, not showing all tests of that example')
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indent = '>>>'
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for line in example.source.splitlines():
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lines.append('??? %s %s' % (indent, line))
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indent = '...'
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if excinfo.errisinstance(doctest.DocTestFailure):
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lines += checker.output_difference(example,
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doctestfailure.got, REPORT_UDIFF).split("\n")
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else:
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inner_excinfo = py.code.ExceptionInfo(excinfo.value.exc_info)
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lines += ["UNEXPECTED EXCEPTION: %s" %
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repr(inner_excinfo.value)]
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lines += traceback.format_exception(*excinfo.value.exc_info)
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return ReprFailDoctest(reprlocation, lines)
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else:
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return super(DoctestItem, self).repr_failure(excinfo)
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def reportinfo(self):
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return self.fspath, None, "[doctest] %s" % self.name
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def _get_flag_lookup():
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import doctest
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return dict(DONT_ACCEPT_TRUE_FOR_1=doctest.DONT_ACCEPT_TRUE_FOR_1,
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DONT_ACCEPT_BLANKLINE=doctest.DONT_ACCEPT_BLANKLINE,
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NORMALIZE_WHITESPACE=doctest.NORMALIZE_WHITESPACE,
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ELLIPSIS=doctest.ELLIPSIS,
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IGNORE_EXCEPTION_DETAIL=doctest.IGNORE_EXCEPTION_DETAIL,
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COMPARISON_FLAGS=doctest.COMPARISON_FLAGS,
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ALLOW_UNICODE=_get_allow_unicode_flag())
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def get_optionflags(parent):
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optionflags_str = parent.config.getini("doctest_optionflags")
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flag_lookup_table = _get_flag_lookup()
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flag_acc = 0
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for flag in optionflags_str:
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flag_acc |= flag_lookup_table[flag]
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return flag_acc
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class DoctestTextfile(DoctestItem, pytest.Module):
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def runtest(self):
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import doctest
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fixture_request = _setup_fixtures(self)
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# inspired by doctest.testfile; ideally we would use it directly,
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# but it doesn't support passing a custom checker
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text = self.fspath.read()
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filename = str(self.fspath)
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name = self.fspath.basename
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globs = dict(getfixture=fixture_request.getfuncargvalue)
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if '__name__' not in globs:
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globs['__name__'] = '__main__'
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optionflags = get_optionflags(self)
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runner = doctest.DebugRunner(verbose=0, optionflags=optionflags,
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checker=_get_unicode_checker())
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parser = doctest.DocTestParser()
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test = parser.get_doctest(text, globs, name, filename, 0)
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_check_all_skipped(test)
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runner.run(test)
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def _check_all_skipped(test):
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"""raises pytest.skip() if all examples in the given DocTest have the SKIP
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option set.
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"""
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import doctest
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all_skipped = all(x.options.get(doctest.SKIP, False) for x in test.examples)
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if all_skipped:
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pytest.skip('all tests skipped by +SKIP option')
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class DoctestModule(pytest.Module):
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def collect(self):
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import doctest
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if self.fspath.basename == "conftest.py":
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module = self.config.pluginmanager._importconftest(self.fspath)
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else:
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try:
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module = self.fspath.pyimport()
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except ImportError:
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if self.config.getvalue('doctest_ignore_import_errors'):
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pytest.skip('unable to import module %r' % self.fspath)
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else:
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raise
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# uses internal doctest module parsing mechanism
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finder = doctest.DocTestFinder()
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optionflags = get_optionflags(self)
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runner = doctest.DebugRunner(verbose=0, optionflags=optionflags,
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checker=_get_unicode_checker())
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for test in finder.find(module, module.__name__):
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if test.examples: # skip empty doctests
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yield DoctestItem(test.name, self, runner, test)
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def _setup_fixtures(doctest_item):
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"""
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Used by DoctestTextfile and DoctestItem to setup fixture information.
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"""
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def func():
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pass
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doctest_item.funcargs = {}
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fm = doctest_item.session._fixturemanager
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doctest_item._fixtureinfo = fm.getfixtureinfo(node=doctest_item, func=func,
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cls=None, funcargs=False)
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fixture_request = FixtureRequest(doctest_item)
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fixture_request._fillfixtures()
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return fixture_request
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def _get_unicode_checker():
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"""
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Returns a doctest.OutputChecker subclass that takes in account the
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ALLOW_UNICODE option to ignore u'' prefixes in strings. Useful
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when the same doctest should run in Python 2 and Python 3.
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An inner class is used to avoid importing "doctest" at the module
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level.
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"""
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if hasattr(_get_unicode_checker, 'UnicodeOutputChecker'):
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return _get_unicode_checker.UnicodeOutputChecker()
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import doctest
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import re
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class UnicodeOutputChecker(doctest.OutputChecker):
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"""
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Copied from doctest_nose_plugin.py from the nltk project:
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https://github.com/nltk/nltk
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"""
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_literal_re = re.compile(r"(\W|^)[uU]([rR]?[\'\"])", re.UNICODE)
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def check_output(self, want, got, optionflags):
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res = doctest.OutputChecker.check_output(self, want, got,
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optionflags)
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if res:
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return True
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if not (optionflags & _get_allow_unicode_flag()):
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return False
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else: # pragma: no cover
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# the code below will end up executed only in Python 2 in
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# our tests, and our coverage check runs in Python 3 only
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def remove_u_prefixes(txt):
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return re.sub(self._literal_re, r'\1\2', txt)
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want = remove_u_prefixes(want)
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got = remove_u_prefixes(got)
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res = doctest.OutputChecker.check_output(self, want, got,
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optionflags)
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return res
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_get_unicode_checker.UnicodeOutputChecker = UnicodeOutputChecker
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return _get_unicode_checker.UnicodeOutputChecker()
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def _get_allow_unicode_flag():
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"""
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Registers and returns the ALLOW_UNICODE flag.
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"""
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import doctest
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return doctest.register_optionflag('ALLOW_UNICODE')
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