364 lines
14 KiB
Python
364 lines
14 KiB
Python
import re
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import unittest
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from urlparse import urlsplit, urlunsplit
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from xml.dom.minidom import parseString, Node
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from django.conf import settings
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from django.core import mail
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from django.core.management import call_command
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from django.core.urlresolvers import clear_url_caches
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from django.db import transaction
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from django.http import QueryDict
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from django.test import _doctest as doctest
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from django.test.client import Client
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from django.utils import simplejson
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normalize_long_ints = lambda s: re.sub(r'(?<![\w])(\d+)L(?![\w])', '\\1', s)
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def to_list(value):
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"""
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Puts value into a list if it's not already one.
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Returns an empty list if value is None.
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"""
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if value is None:
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value = []
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elif not isinstance(value, list):
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value = [value]
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return value
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class OutputChecker(doctest.OutputChecker):
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def check_output(self, want, got, optionflags):
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"The entry method for doctest output checking. Defers to a sequence of child checkers"
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checks = (self.check_output_default,
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self.check_output_long,
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self.check_output_xml,
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self.check_output_json)
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for check in checks:
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if check(want, got, optionflags):
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return True
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return False
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def check_output_default(self, want, got, optionflags):
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"The default comparator provided by doctest - not perfect, but good for most purposes"
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return doctest.OutputChecker.check_output(self, want, got, optionflags)
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def check_output_long(self, want, got, optionflags):
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"""Doctest does an exact string comparison of output, which means long
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integers aren't equal to normal integers ("22L" vs. "22"). The
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following code normalizes long integers so that they equal normal
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integers.
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"""
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return normalize_long_ints(want) == normalize_long_ints(got)
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def check_output_xml(self, want, got, optionsflags):
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"""Tries to do a 'xml-comparision' of want and got. Plain string
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comparision doesn't always work because, for example, attribute
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ordering should not be important.
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Based on http://codespeak.net/svn/lxml/trunk/src/lxml/doctestcompare.py
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"""
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# We use this to distinguish the output of repr() from an XML element:
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_repr_re = re.compile(r'^<[^>]+ (at|object) ')
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_norm_whitespace_re = re.compile(r'[ \t\n][ \t\n]+')
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def norm_whitespace(v):
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return _norm_whitespace_re.sub(' ', v)
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def looks_like_xml(s):
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s = s.strip()
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return (s.startswith('<')
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and not _repr_re.search(s))
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def child_text(element):
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return ''.join([c.data for c in element.childNodes
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if c.nodeType == Node.TEXT_NODE])
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def children(element):
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return [c for c in element.childNodes
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if c.nodeType == Node.ELEMENT_NODE]
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def norm_child_text(element):
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return norm_whitespace(child_text(element))
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def attrs_dict(element):
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return dict(element.attributes.items())
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def check_element(want_element, got_element):
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if want_element.tagName != got_element.tagName:
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return False
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if norm_child_text(want_element) != norm_child_text(got_element):
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return False
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if attrs_dict(want_element) != attrs_dict(got_element):
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return False
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want_children = children(want_element)
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got_children = children(got_element)
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if len(want_children) != len(got_children):
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return False
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for want, got in zip(want_children, got_children):
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if not check_element(want, got):
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return False
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return True
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want, got = self._strip_quotes(want, got)
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want = want.replace('\\n','\n')
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got = got.replace('\\n','\n')
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# If what we want doesn't look like markup, don't bother trying
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# to parse it.
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if not looks_like_xml(want):
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return False
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# Parse the want and got strings, and compare the parsings.
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try:
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want_root = parseString(want).firstChild
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got_root = parseString(got).firstChild
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except:
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return False
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return check_element(want_root, got_root)
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def check_output_json(self, want, got, optionsflags):
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"Tries to compare want and got as if they were JSON-encoded data"
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want, got = self._strip_quotes(want, got)
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try:
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want_json = simplejson.loads(want)
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got_json = simplejson.loads(got)
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except:
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return False
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return want_json == got_json
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def _strip_quotes(self, want, got):
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"""
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Strip quotes of doctests output values:
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>>> o = OutputChecker()
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>>> o._strip_quotes("'foo'")
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"foo"
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>>> o._strip_quotes('"foo"')
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"foo"
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>>> o._strip_quotes("u'foo'")
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"foo"
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>>> o._strip_quotes('u"foo"')
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"foo"
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"""
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def is_quoted_string(s):
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s = s.strip()
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return (len(s) >= 2
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and s[0] == s[-1]
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and s[0] in ('"', "'"))
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def is_quoted_unicode(s):
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s = s.strip()
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return (len(s) >= 3
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and s[0] == 'u'
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and s[1] == s[-1]
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and s[1] in ('"', "'"))
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if is_quoted_string(want) and is_quoted_string(got):
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want = want.strip()[1:-1]
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got = got.strip()[1:-1]
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elif is_quoted_unicode(want) and is_quoted_unicode(got):
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want = want.strip()[2:-1]
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got = got.strip()[2:-1]
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return want, got
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class DocTestRunner(doctest.DocTestRunner):
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def __init__(self, *args, **kwargs):
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doctest.DocTestRunner.__init__(self, *args, **kwargs)
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self.optionflags = doctest.ELLIPSIS
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def report_unexpected_exception(self, out, test, example, exc_info):
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doctest.DocTestRunner.report_unexpected_exception(self, out, test,
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example, exc_info)
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# Rollback, in case of database errors. Otherwise they'd have
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# side effects on other tests.
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transaction.rollback_unless_managed()
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class TestCase(unittest.TestCase):
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def _pre_setup(self):
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"""Performs any pre-test setup. This includes:
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* Flushing the database.
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* If the Test Case class has a 'fixtures' member, installing the
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named fixtures.
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* If the Test Case class has a 'urls' member, replace the
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ROOT_URLCONF with it.
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* Clearing the mail test outbox.
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"""
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call_command('flush', verbosity=0, interactive=False)
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if hasattr(self, 'fixtures'):
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# We have to use this slightly awkward syntax due to the fact
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# that we're using *args and **kwargs together.
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call_command('loaddata', *self.fixtures, **{'verbosity': 0})
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if hasattr(self, 'urls'):
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self._old_root_urlconf = settings.ROOT_URLCONF
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settings.ROOT_URLCONF = self.urls
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clear_url_caches()
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mail.outbox = []
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def __call__(self, result=None):
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"""
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Wrapper around default __call__ method to perform common Django test
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set up. This means that user-defined Test Cases aren't required to
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include a call to super().setUp().
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"""
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self.client = Client()
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try:
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self._pre_setup()
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except (KeyboardInterrupt, SystemExit):
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raise
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except Exception:
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import sys
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result.addError(self, sys.exc_info())
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return
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super(TestCase, self).__call__(result)
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try:
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self._post_teardown()
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except (KeyboardInterrupt, SystemExit):
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raise
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except Exception:
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import sys
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result.addError(self, sys.exc_info())
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return
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def _post_teardown(self):
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""" Performs any post-test things. This includes:
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* Putting back the original ROOT_URLCONF if it was changed.
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"""
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if hasattr(self, '_old_root_urlconf'):
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settings.ROOT_URLCONF = self._old_root_urlconf
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clear_url_caches()
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def assertRedirects(self, response, expected_url, status_code=302,
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target_status_code=200, host=None):
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"""Asserts that a response redirected to a specific URL, and that the
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redirect URL can be loaded.
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Note that assertRedirects won't work for external links since it uses
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TestClient to do a request.
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"""
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self.assertEqual(response.status_code, status_code,
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("Response didn't redirect as expected: Response code was %d"
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" (expected %d)" % (response.status_code, status_code)))
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url = response['Location']
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scheme, netloc, path, query, fragment = urlsplit(url)
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e_scheme, e_netloc, e_path, e_query, e_fragment = urlsplit(expected_url)
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if not (e_scheme or e_netloc):
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expected_url = urlunsplit(('http', host or 'testserver', e_path,
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e_query, e_fragment))
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self.assertEqual(url, expected_url,
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"Response redirected to '%s', expected '%s'" % (url, expected_url))
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# Get the redirection page, using the same client that was used
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# to obtain the original response.
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redirect_response = response.client.get(path, QueryDict(query))
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self.assertEqual(redirect_response.status_code, target_status_code,
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("Couldn't retrieve redirection page '%s': response code was %d"
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" (expected %d)") %
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(path, redirect_response.status_code, target_status_code))
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def assertContains(self, response, text, count=None, status_code=200):
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"""
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Asserts that a response indicates that a page was retrieved
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successfully, (i.e., the HTTP status code was as expected), and that
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``text`` occurs ``count`` times in the content of the response.
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If ``count`` is None, the count doesn't matter - the assertion is true
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if the text occurs at least once in the response.
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"""
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self.assertEqual(response.status_code, status_code,
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"Couldn't retrieve page: Response code was %d (expected %d)'" %
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(response.status_code, status_code))
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real_count = response.content.count(text)
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if count is not None:
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self.assertEqual(real_count, count,
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"Found %d instances of '%s' in response (expected %d)" %
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(real_count, text, count))
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else:
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self.failUnless(real_count != 0,
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"Couldn't find '%s' in response" % text)
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def assertNotContains(self, response, text, status_code=200):
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"""
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Asserts that a response indicates that a page was retrieved
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successfully, (i.e., the HTTP status code was as expected), and that
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``text`` doesn't occurs in the content of the response.
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"""
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self.assertEqual(response.status_code, status_code,
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"Couldn't retrieve page: Response code was %d (expected %d)'" %
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(response.status_code, status_code))
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self.assertEqual(response.content.count(text), 0,
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"Response should not contain '%s'" % text)
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def assertFormError(self, response, form, field, errors):
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"""
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Asserts that a form used to render the response has a specific field
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error.
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"""
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# Put context(s) into a list to simplify processing.
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contexts = to_list(response.context)
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if not contexts:
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self.fail('Response did not use any contexts to render the'
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' response')
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# Put error(s) into a list to simplify processing.
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errors = to_list(errors)
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# Search all contexts for the error.
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found_form = False
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for i,context in enumerate(contexts):
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if form not in context:
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continue
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found_form = True
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for err in errors:
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if field:
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if field in context[form].errors:
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field_errors = context[form].errors[field]
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self.failUnless(err in field_errors,
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"The field '%s' on form '%s' in"
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" context %d does not contain the"
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" error '%s' (actual errors: %s)" %
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(field, form, i, err,
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repr(field_errors)))
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elif field in context[form].fields:
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self.fail("The field '%s' on form '%s' in context %d"
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" contains no errors" % (field, form, i))
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else:
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self.fail("The form '%s' in context %d does not"
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" contain the field '%s'" %
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(form, i, field))
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else:
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non_field_errors = context[form].non_field_errors()
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self.failUnless(err in non_field_errors,
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"The form '%s' in context %d does not contain the"
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" non-field error '%s' (actual errors: %s)" %
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(form, i, err, non_field_errors))
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if not found_form:
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self.fail("The form '%s' was not used to render the response" %
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form)
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def assertTemplateUsed(self, response, template_name):
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"""
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Asserts that the template with the provided name was used in rendering
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the response.
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"""
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template_names = [t.name for t in to_list(response.template)]
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if not template_names:
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self.fail('No templates used to render the response')
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self.failUnless(template_name in template_names,
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(u"Template '%s' was not a template used to render the response."
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u" Actual template(s) used: %s") % (template_name,
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u', '.join(template_names)))
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def assertTemplateNotUsed(self, response, template_name):
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"""
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Asserts that the template with the provided name was NOT used in
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rendering the response.
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"""
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template_names = [t.name for t in to_list(response.template)]
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self.failIf(template_name in template_names,
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(u"Template '%s' was used unexpectedly in rendering the"
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u" response") % template_name)
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