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django-3k / tests / regressiontests / test_client_regress / models.py

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# -*- coding: utf-8 -*-
"""
Regression tests for the Test Client, especially the customized assertions.
"""
import os
from django.conf import settings
from django.utils.py3 import to_utf8_string
from django.test import Client, TestCase
from django.test.utils import ContextList
from django.core.urlresolvers import reverse
from django.core.exceptions import SuspiciousOperation
from django.template import TemplateDoesNotExist, TemplateSyntaxError, Context
from django.template import loader

class AssertContainsTests(TestCase):
    def setUp(self):
        self.old_templates = settings.TEMPLATE_DIRS
        settings.TEMPLATE_DIRS = (os.path.join(os.path.dirname(__file__), 'templates'),)

    def tearDown(self):
        settings.TEMPLATE_DIRS = self.old_templates

    def test_contains(self):
        "Responses can be inspected for content, including counting repeated substrings"
        response = self.client.get('/test_client_regress/no_template_view/')

        self.assertNotContains(response, 'never')
        self.assertContains(response, 'never', 0)
        self.assertContains(response, 'once')
        self.assertContains(response, 'once', 1)
        self.assertContains(response, 'twice')
        self.assertContains(response, 'twice', 2)

        try:
            self.assertContains(response, 'text', status_code=999)
        except AssertionError as e:
            self.assertEquals(str(e), "Couldn't retrieve page: Response code was 200 (expected 999)")
        try:
            self.assertContains(response, 'text', status_code=999, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Couldn't retrieve page: Response code was 200 (expected 999)")

        try:
            self.assertNotContains(response, 'text', status_code=999)
        except AssertionError as e:
            self.assertEquals(str(e), "Couldn't retrieve page: Response code was 200 (expected 999)")
        try:
            self.assertNotContains(response, 'text', status_code=999, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Couldn't retrieve page: Response code was 200 (expected 999)")

        try:
            self.assertNotContains(response, 'once')
        except AssertionError as e:
            self.assertEquals(str(e), "Response should not contain 'once'")
        try:
            self.assertNotContains(response, 'once', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Response should not contain 'once'")

        try:
            self.assertContains(response, 'never', 1)
        except AssertionError as e:
            self.assertEquals(str(e), "Found 0 instances of 'never' in response (expected 1)")
        try:
            self.assertContains(response, 'never', 1, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Found 0 instances of 'never' in response (expected 1)")

        try:
            self.assertContains(response, 'once', 0)
        except AssertionError as e:
            self.assertEquals(str(e), "Found 1 instances of 'once' in response (expected 0)")
        try:
            self.assertContains(response, 'once', 0, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Found 1 instances of 'once' in response (expected 0)")

        try:
            self.assertContains(response, 'once', 2)
        except AssertionError as e:
            self.assertEquals(str(e), "Found 1 instances of 'once' in response (expected 2)")
        try:
            self.assertContains(response, 'once', 2, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Found 1 instances of 'once' in response (expected 2)")

        try:
            self.assertContains(response, 'twice', 1)
        except AssertionError as e:
            self.assertEquals(str(e), "Found 2 instances of 'twice' in response (expected 1)")
        try:
            self.assertContains(response, 'twice', 1, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Found 2 instances of 'twice' in response (expected 1)")

        try:
            self.assertContains(response, 'thrice')
        except AssertionError as e:
            self.assertEquals(str(e), "Couldn't find 'thrice' in response")
        try:
            self.assertContains(response, 'thrice', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Couldn't find 'thrice' in response")

        try:
            self.assertContains(response, 'thrice', 3)
        except AssertionError as e:
            self.assertEquals(str(e), "Found 0 instances of 'thrice' in response (expected 3)")
        try:
            self.assertContains(response, 'thrice', 3, msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Found 0 instances of 'thrice' in response (expected 3)")

    def test_unicode_contains(self):
        "Unicode characters can be found in template context"
        #Regression test for #10183
        r = self.client.get('/test_client_regress/check_unicode/')
        self.assertContains(r, 'さかき')
        self.assertContains(r, '\xe5\xb3\xa0'.decode('utf-8'))

    def test_unicode_not_contains(self):
        "Unicode characters can be searched for, and not found in template context"
        #Regression test for #10183
        r = self.client.get('/test_client_regress/check_unicode/')
        self.assertNotContains(r, 'はたけ')
        self.assertNotContains(r, '\xe3\x81\xaf\xe3\x81\x9f\xe3\x81\x91'.decode('utf-8'))


class AssertTemplateUsedTests(TestCase):
    fixtures = ['testdata.json']

    def test_no_context(self):
        "Template usage assertions work then templates aren't in use"
        response = self.client.get('/test_client_regress/no_template_view/')

        # Check that the no template case doesn't mess with the template assertions
        self.assertTemplateNotUsed(response, 'GET Template')

        try:
            self.assertTemplateUsed(response, 'GET Template')
        except AssertionError as e:
            self.assertEquals(str(e), "No templates used to render the response")

        try:
            self.assertTemplateUsed(response, 'GET Template', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: No templates used to render the response")

    def test_single_context(self):
        "Template assertions work when there is a single context"
        response = self.client.get('/test_client/post_view/', {})

        try:
            self.assertTemplateNotUsed(response, 'Empty GET Template')
        except AssertionError as e:
            self.assertEquals(str(e), "Template 'Empty GET Template' was used unexpectedly in rendering the response")

        try:
            self.assertTemplateNotUsed(response, 'Empty GET Template', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Template 'Empty GET Template' was used unexpectedly in rendering the response")

        try:
            self.assertTemplateUsed(response, 'Empty POST Template')
        except AssertionError as e:
            self.assertEquals(str(e), "Template 'Empty POST Template' was not a template used to render the response. Actual template(s) used: Empty GET Template")

        try:
            self.assertTemplateUsed(response, 'Empty POST Template', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Template 'Empty POST Template' was not a template used to render the response. Actual template(s) used: Empty GET Template")

    def test_multiple_context(self):
        "Template assertions work when there are multiple contexts"
        post_data = {
            'text': 'Hello World',
            'email': 'foo@example.com',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view_with_template/', post_data)
        self.assertContains(response, 'POST data OK')
        try:
            self.assertTemplateNotUsed(response, "form_view.html")
        except AssertionError as e:
            self.assertEquals(str(e), "Template 'form_view.html' was used unexpectedly in rendering the response")

        try:
            self.assertTemplateNotUsed(response, 'base.html')
        except AssertionError as e:
            self.assertEquals(str(e), "Template 'base.html' was used unexpectedly in rendering the response")

        try:
            self.assertTemplateUsed(response, "Valid POST Template")
        except AssertionError as e:
            self.assertEquals(str(e), "Template 'Valid POST Template' was not a template used to render the response. Actual template(s) used: form_view.html, base.html")

class AssertRedirectsTests(TestCase):
    def test_redirect_page(self):
        "An assertion is raised if the original page couldn't be retrieved as expected"
        # This page will redirect with code 301, not 302
        response = self.client.get('/test_client/permanent_redirect_view/')
        try:
            self.assertRedirects(response, '/test_client/get_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Response didn't redirect as expected: Response code was 301 (expected 302)")

        try:
            self.assertRedirects(response, '/test_client/get_view/', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Response didn't redirect as expected: Response code was 301 (expected 302)")

    def test_lost_query(self):
        "An assertion is raised if the redirect location doesn't preserve GET parameters"
        response = self.client.get('/test_client/redirect_view/', {'var': 'value'})
        try:
            self.assertRedirects(response, '/test_client/get_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Response redirected to 'http://testserver/test_client/get_view/?var=value', expected 'http://testserver/test_client/get_view/'")

        try:
            self.assertRedirects(response, '/test_client/get_view/', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Response redirected to 'http://testserver/test_client/get_view/?var=value', expected 'http://testserver/test_client/get_view/'")

    def test_incorrect_target(self):
        "An assertion is raised if the response redirects to another target"
        response = self.client.get('/test_client/permanent_redirect_view/')
        try:
            # Should redirect to get_view
            self.assertRedirects(response, '/test_client/some_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Response didn't redirect as expected: Response code was 301 (expected 302)")

    def test_target_page(self):
        "An assertion is raised if the response redirect target cannot be retrieved as expected"
        response = self.client.get('/test_client/double_redirect_view/')
        try:
            # The redirect target responds with a 301 code, not 200
            self.assertRedirects(response, 'http://testserver/test_client/permanent_redirect_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Couldn't retrieve redirection page '/test_client/permanent_redirect_view/': response code was 301 (expected 200)")

        try:
            # The redirect target responds with a 301 code, not 200
            self.assertRedirects(response, 'http://testserver/test_client/permanent_redirect_view/', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Couldn't retrieve redirection page '/test_client/permanent_redirect_view/': response code was 301 (expected 200)")

    def test_redirect_chain(self):
        "You can follow a redirect chain of multiple redirects"
        response = self.client.get('/test_client_regress/redirects/further/more/', {}, follow=True)
        self.assertRedirects(response, '/test_client_regress/no_template_view/',
            status_code=301, target_status_code=200)

        self.assertEquals(len(response.redirect_chain), 1)
        self.assertEquals(response.redirect_chain[0], ('http://testserver/test_client_regress/no_template_view/', 301))

    def test_multiple_redirect_chain(self):
        "You can follow a redirect chain of multiple redirects"
        response = self.client.get('/test_client_regress/redirects/', {}, follow=True)
        self.assertRedirects(response, '/test_client_regress/no_template_view/',
            status_code=301, target_status_code=200)

        self.assertEquals(len(response.redirect_chain), 3)
        self.assertEquals(response.redirect_chain[0], ('http://testserver/test_client_regress/redirects/further/', 301))
        self.assertEquals(response.redirect_chain[1], ('http://testserver/test_client_regress/redirects/further/more/', 301))
        self.assertEquals(response.redirect_chain[2], ('http://testserver/test_client_regress/no_template_view/', 301))

    def test_redirect_chain_to_non_existent(self):
        "You can follow a chain to a non-existent view"
        response = self.client.get('/test_client_regress/redirect_to_non_existent_view2/', {}, follow=True)
        self.assertRedirects(response, '/test_client_regress/non_existent_view/',
            status_code=301, target_status_code=404)

    def test_redirect_chain_to_self(self):
        "Redirections to self are caught and escaped"
        response = self.client.get('/test_client_regress/redirect_to_self/', {}, follow=True)
        # The chain of redirects stops once the cycle is detected.
        self.assertRedirects(response, '/test_client_regress/redirect_to_self/',
            status_code=301, target_status_code=301)
        self.assertEquals(len(response.redirect_chain), 2)

    def test_circular_redirect(self):
        "Circular redirect chains are caught and escaped"
        response = self.client.get('/test_client_regress/circular_redirect_1/', {}, follow=True)
        # The chain of redirects will get back to the starting point, but stop there.
        self.assertRedirects(response, '/test_client_regress/circular_redirect_2/',
            status_code=301, target_status_code=301)
        self.assertEquals(len(response.redirect_chain), 4)

    def test_redirect_chain_post(self):
        "A redirect chain will be followed from an initial POST post"
        response = self.client.post('/test_client_regress/redirects/',
            {'nothing': 'to_send'}, follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEquals(len(response.redirect_chain), 3)

    def test_redirect_chain_head(self):
        "A redirect chain will be followed from an initial HEAD request"
        response = self.client.head('/test_client_regress/redirects/',
            {'nothing': 'to_send'}, follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEquals(len(response.redirect_chain), 3)

    def test_redirect_chain_options(self):
        "A redirect chain will be followed from an initial OPTIONS request"
        response = self.client.options('/test_client_regress/redirects/',
            {'nothing': 'to_send'}, follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEquals(len(response.redirect_chain), 3)

    def test_redirect_chain_put(self):
        "A redirect chain will be followed from an initial PUT request"
        response = self.client.put('/test_client_regress/redirects/',
            {'nothing': 'to_send'}, follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEquals(len(response.redirect_chain), 3)

    def test_redirect_chain_delete(self):
        "A redirect chain will be followed from an initial DELETE request"
        response = self.client.delete('/test_client_regress/redirects/',
            {'nothing': 'to_send'}, follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEquals(len(response.redirect_chain), 3)

    def test_redirect_chain_on_non_redirect_page(self):
        "An assertion is raised if the original page couldn't be retrieved as expected"
        # This page will redirect with code 301, not 302
        response = self.client.get('/test_client/get_view/', follow=True)
        try:
            self.assertRedirects(response, '/test_client/get_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Response didn't redirect as expected: Response code was 200 (expected 302)")

        try:
            self.assertRedirects(response, '/test_client/get_view/', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Response didn't redirect as expected: Response code was 200 (expected 302)")

    def test_redirect_on_non_redirect_page(self):
        "An assertion is raised if the original page couldn't be retrieved as expected"
        # This page will redirect with code 301, not 302
        response = self.client.get('/test_client/get_view/')
        try:
            self.assertRedirects(response, '/test_client/get_view/')
        except AssertionError as e:
            self.assertEquals(str(e), "Response didn't redirect as expected: Response code was 200 (expected 302)")

        try:
            self.assertRedirects(response, '/test_client/get_view/', msg_prefix='abc')
        except AssertionError as e:
            self.assertEquals(str(e), "abc: Response didn't redirect as expected: Response code was 200 (expected 302)")


class AssertFormErrorTests(TestCase):
    def test_unknown_form(self):
        "An assertion is raised if the form name is unknown"
        post_data = {
            'text': 'Hello World',
            'email': 'not an email address',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view/', post_data)
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "Invalid POST Template")

        try:
            self.assertFormError(response, 'wrong_form', 'some_field', 'Some error.')
        except AssertionError as e:
            self.assertEqual(str(e), "The form 'wrong_form' was not used to render the response")
        try:
            self.assertFormError(response, 'wrong_form', 'some_field', 'Some error.', msg_prefix='abc')
        except AssertionError as e:
            self.assertEqual(str(e), "abc: The form 'wrong_form' was not used to render the response")

    def test_unknown_field(self):
        "An assertion is raised if the field name is unknown"
        post_data = {
            'text': 'Hello World',
            'email': 'not an email address',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view/', post_data)
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "Invalid POST Template")

        try:
            self.assertFormError(response, 'form', 'some_field', 'Some error.')
        except AssertionError as e:
            self.assertEqual(str(e), "The form 'form' in context 0 does not contain the field 'some_field'")
        try:
            self.assertFormError(response, 'form', 'some_field', 'Some error.', msg_prefix='abc')
        except AssertionError as e:
            self.assertEqual(str(e), "abc: The form 'form' in context 0 does not contain the field 'some_field'")

    def test_noerror_field(self):
        "An assertion is raised if the field doesn't have any errors"
        post_data = {
            'text': 'Hello World',
            'email': 'not an email address',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view/', post_data)
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "Invalid POST Template")

        try:
            self.assertFormError(response, 'form', 'value', 'Some error.')
        except AssertionError as e:
            self.assertEqual(str(e), "The field 'value' on form 'form' in context 0 contains no errors")
        try:
            self.assertFormError(response, 'form', 'value', 'Some error.', msg_prefix='abc')
        except AssertionError as e:
            self.assertEqual(str(e), "abc: The field 'value' on form 'form' in context 0 contains no errors")

    def test_unknown_error(self):
        "An assertion is raised if the field doesn't contain the provided error"
        post_data = {
            'text': 'Hello World',
            'email': 'not an email address',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view/', post_data)
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "Invalid POST Template")

        try:
            self.assertFormError(response, 'form', 'email', 'Some error.')
        except AssertionError as e:
            self.assertEqual(str(e), "The field 'email' on form 'form' in context 0 does not contain the error 'Some error.' (actual errors: [u'Enter a valid e-mail address.'])")
        try:
            self.assertFormError(response, 'form', 'email', 'Some error.', msg_prefix='abc')
        except AssertionError as e:
            self.assertEqual(str(e), "abc: The field 'email' on form 'form' in context 0 does not contain the error 'Some error.' (actual errors: [u'Enter a valid e-mail address.'])")

    def test_unknown_nonfield_error(self):
        """
        Checks that an assertion is raised if the form's non field errors
        doesn't contain the provided error.
        """
        post_data = {
            'text': 'Hello World',
            'email': 'not an email address',
            'value': 37,
            'single': 'b',
            'multi': ('b','c','e')
        }
        response = self.client.post('/test_client/form_view/', post_data)
        self.assertEqual(response.status_code, 200)
        self.assertTemplateUsed(response, "Invalid POST Template")

        try:
            self.assertFormError(response, 'form', None, 'Some error.')
        except AssertionError as e:
            self.assertEqual(str(e), "The form 'form' in context 0 does not contain the non-field error 'Some error.' (actual errors: )")
        try:
            self.assertFormError(response, 'form', None, 'Some error.', msg_prefix='abc')
        except AssertionError as e:
            self.assertEqual(str(e), "abc: The form 'form' in context 0 does not contain the non-field error 'Some error.' (actual errors: )")

class LoginTests(TestCase):
    fixtures = ['testdata']

    def test_login_different_client(self):
        "Check that using a different test client doesn't violate authentication"

        # Create a second client, and log in.
        c = Client()
        login = c.login(username='testclient', password='password')
        self.failUnless(login, 'Could not log in')

        # Get a redirection page with the second client.
        response = c.get("/test_client_regress/login_protected_redirect_view/")

        # At this points, the self.client isn't logged in.
        # Check that assertRedirects uses the original client, not the
        # default client.
        self.assertRedirects(response, "http://testserver/test_client_regress/get_view/")

class URLEscapingTests(TestCase):
    def test_simple_argument_get(self):
        "Get a view that has a simple string argument"
        response = self.client.get(reverse('arg_view', args=['Slartibartfast']))
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'Howdy, Slartibartfast')

    def test_argument_with_space_get(self):
        "Get a view that has a string argument that requires escaping"
        response = self.client.get(reverse('arg_view', args=['Arthur Dent']))
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'Hi, Arthur')

    def test_simple_argument_post(self):
        "Post for a view that has a simple string argument"
        response = self.client.post(reverse('arg_view', args=['Slartibartfast']))
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'Howdy, Slartibartfast')

    def test_argument_with_space_post(self):
        "Post for a view that has a string argument that requires escaping"
        response = self.client.post(reverse('arg_view', args=['Arthur Dent']))
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'Hi, Arthur')

class ExceptionTests(TestCase):
    fixtures = ['testdata.json']

    def test_exception_cleared(self):
        "#5836 - A stale user exception isn't re-raised by the test client."

        login = self.client.login(username='testclient',password='password')
        self.failUnless(login, 'Could not log in')
        try:
            response = self.client.get("/test_client_regress/staff_only/")
            self.fail("General users should not be able to visit this page")
        except SuspiciousOperation:
            pass

        # At this point, an exception has been raised, and should be cleared.

        # This next operation should be successful; if it isn't we have a problem.
        login = self.client.login(username='staff', password='password')
        self.failUnless(login, 'Could not log in')
        try:
            self.client.get("/test_client_regress/staff_only/")
        except SuspiciousOperation:
            self.fail("Staff should be able to visit this page")

class TemplateExceptionTests(TestCase):
    def setUp(self):
        # Reset the loaders so they don't try to render cached templates.
        if loader.template_source_loaders is not None:
            for template_loader in loader.template_source_loaders:
                if hasattr(template_loader, 'reset'):
                    template_loader.reset()
        self.old_templates = settings.TEMPLATE_DIRS
        settings.TEMPLATE_DIRS = ()

    def tearDown(self):
        settings.TEMPLATE_DIRS = self.old_templates

    def test_no_404_template(self):
        "Missing templates are correctly reported by test client"
        try:
            response = self.client.get("/no_such_view/")
            self.fail("Should get error about missing template")
        except TemplateDoesNotExist:
            pass

    def test_bad_404_template(self):
        "Errors found when rendering 404 error templates are re-raised"
        settings.TEMPLATE_DIRS = (os.path.join(os.path.dirname(__file__), 'bad_templates'),)
        try:
            response = self.client.get("/no_such_view/")
            self.fail("Should get error about syntax error in template")
        except TemplateSyntaxError:
            pass

# We need two different tests to check URLconf substitution -  one to check
# it was changed, and another one (without self.urls) to check it was reverted on
# teardown. This pair of tests relies upon the alphabetical ordering of test execution.
class UrlconfSubstitutionTests(TestCase):
    urls = 'regressiontests.test_client_regress.urls'

    def test_urlconf_was_changed(self):
        "TestCase can enforce a custom URLconf on a per-test basis"
        url = reverse('arg_view', args=['somename'])
        self.assertEquals(url, '/arg_view/somename/')

# This test needs to run *after* UrlconfSubstitutionTests; the zz prefix in the
# name is to ensure alphabetical ordering.
class zzUrlconfSubstitutionTests(TestCase):
    def test_urlconf_was_reverted(self):
        "URLconf is reverted to original value after modification in a TestCase"
        url = reverse('arg_view', args=['somename'])
        self.assertEquals(url, '/test_client_regress/arg_view/somename/')

class ContextTests(TestCase):
    fixtures = ['testdata']

    def test_single_context(self):
        "Context variables can be retrieved from a single context"
        response = self.client.get("/test_client_regress/request_data/", data={'foo':'whiz'})
        self.assertEqual(response.context.__class__, Context)
        self.assertEqual(response.context['get-foo'], 'whiz')
        self.assertEqual(response.context['request-foo'], 'whiz')
        self.assertEqual(response.context['data'], 'sausage')

        try:
            response.context['does-not-exist']
            self.fail('Should not be able to retrieve non-existent key')
        except KeyError as e:
            self.assertEquals(e.args[0], 'does-not-exist')

    def test_inherited_context(self):
        "Context variables can be retrieved from a list of contexts"
        response = self.client.get("/test_client_regress/request_data_extended/", data={'foo':'whiz'})
        self.assertEqual(response.context.__class__, ContextList)
        self.assertEqual(len(response.context), 2)
        self.assertEqual(response.context['get-foo'], 'whiz')
        self.assertEqual(response.context['request-foo'], 'whiz')
        self.assertEqual(response.context['data'], 'bacon')

        try:
            response.context['does-not-exist']
            self.fail('Should not be able to retrieve non-existent key')
        except KeyError as e:
            self.assertEquals(e.args[0], 'does-not-exist')


class SessionTests(TestCase):
    fixtures = ['testdata.json']

    def test_session(self):
        "The session isn't lost if a user logs in"
        # The session doesn't exist to start.
        response = self.client.get('/test_client_regress/check_session/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'NO')

        # This request sets a session variable.
        response = self.client.get('/test_client_regress/set_session/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'set_session')

        # Check that the session has been modified
        response = self.client.get('/test_client_regress/check_session/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'YES')

        # Log in
        login = self.client.login(username='testclient',password='password')
        self.failUnless(login, 'Could not log in')

        # Session should still contain the modified value
        response = self.client.get('/test_client_regress/check_session/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'YES')

    def test_logout(self):
        """Logout should work whether the user is logged in or not (#9978)."""
        self.client.logout()
        login = self.client.login(username='testclient',password='password')
        self.failUnless(login, 'Could not log in')
        self.client.logout()
        self.client.logout()

class RequestMethodTests(TestCase):
    def test_get(self):
        "Request a view via request method GET"
        response = self.client.get('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: GET')

    def test_post(self):
        "Request a view via request method POST"
        response = self.client.post('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: POST')

    def test_head(self):
        "Request a view via request method HEAD"
        response = self.client.head('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        # A HEAD request doesn't return any content.
        self.assertNotEqual(response.content, 'request method: HEAD')
        self.assertEqual(to_utf8_string(response.content), '')

    def test_options(self):
        "Request a view via request method OPTIONS"
        response = self.client.options('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: OPTIONS')

    def test_put(self):
        "Request a view via request method PUT"
        response = self.client.put('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: PUT')

    def test_delete(self):
        "Request a view via request method DELETE"
        response = self.client.delete('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: DELETE')

class RequestMethodStringDataTests(TestCase):
    def test_post(self):
        "Request a view with string data via request method POST"
        # Regression test for #11371
        data = '{"test": "json"}'
        response = self.client.post('/test_client_regress/request_methods/', data=data, content_type='application/json')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: POST')

    def test_put(self):
        "Request a view with string data via request method PUT"
        # Regression test for #11371
        data = '{"test": "json"}'
        response = self.client.put('/test_client_regress/request_methods/', data=data, content_type='application/json')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(to_utf8_string(response.content), 'request method: PUT')

class QueryStringTests(TestCase):
    def test_get_like_requests(self):
        for method_name in ('get','head','options','put','delete'):
            # A GET-like request can pass a query string as data
            method = getattr(self.client, method_name)
            response = method("/test_client_regress/request_data/", data={'foo':'whiz'})
            self.assertEqual(response.context['get-foo'], 'whiz')
            self.assertEqual(response.context['request-foo'], 'whiz')

            # A GET-like request can pass a query string as part of the URL
            response = method("/test_client_regress/request_data/?foo=whiz")
            self.assertEqual(response.context['get-foo'], 'whiz')
            self.assertEqual(response.context['request-foo'], 'whiz')

            # Data provided in the URL to a GET-like request is overridden by actual form data
            response = method("/test_client_regress/request_data/?foo=whiz", data={'foo':'bang'})
            self.assertEqual(response.context['get-foo'], 'bang')
            self.assertEqual(response.context['request-foo'], 'bang')

            response = method("/test_client_regress/request_data/?foo=whiz", data={'bar':'bang'})
            self.assertEqual(response.context['get-foo'], None)
            self.assertEqual(response.context['get-bar'], 'bang')
            self.assertEqual(response.context['request-foo'], None)
            self.assertEqual(response.context['request-bar'], 'bang')

    def test_post_like_requests(self):
        # A POST-like request can pass a query string as data
        response = self.client.post("/test_client_regress/request_data/", data={'foo':'whiz'})
        self.assertEqual(response.context['get-foo'], None)
        self.assertEqual(response.context['post-foo'], 'whiz')

        # A POST-like request can pass a query string as part of the URL
        response = self.client.post("/test_client_regress/request_data/?foo=whiz")
        self.assertEqual(response.context['get-foo'], 'whiz')
        self.assertEqual(response.context['post-foo'], None)
        self.assertEqual(response.context['request-foo'], 'whiz')

        # POST data provided in the URL augments actual form data
        response = self.client.post("/test_client_regress/request_data/?foo=whiz", data={'foo':'bang'})
        self.assertEqual(response.context['get-foo'], 'whiz')
        self.assertEqual(response.context['post-foo'], 'bang')
        self.assertEqual(response.context['request-foo'], 'bang')

        response = self.client.post("/test_client_regress/request_data/?foo=whiz", data={'bar':'bang'})
        self.assertEqual(response.context['get-foo'], 'whiz')
        self.assertEqual(response.context['get-bar'], None)
        self.assertEqual(response.context['post-foo'], None)
        self.assertEqual(response.context['post-bar'], 'bang')
        self.assertEqual(response.context['request-foo'], 'whiz')
        self.assertEqual(response.context['request-bar'], 'bang')

class UnicodePayloadTests(TestCase):
    def test_simple_unicode_payload(self):
        "A simple ASCII-only unicode JSON document can be POSTed"
        # Regression test for #10571
        json = '{"english": "mountain pass"}'
        response = self.client.post("/test_client_regress/parse_unicode_json/", json,
                                    content_type="application/json")
        self.assertEqual(response.content, json)

    def test_unicode_payload_utf8(self):
        "A non-ASCII unicode data encoded as UTF-8 can be POSTed"
        # Regression test for #10571
        json = '{"dog": "собака"}'
        response = self.client.post("/test_client_regress/parse_unicode_json/", json,
                                    content_type="application/json; charset=utf-8")
        self.assertEqual(response.content, json.encode('utf-8'))

    def test_unicode_payload_utf16(self):
        "A non-ASCII unicode data encoded as UTF-16 can be POSTed"
        # Regression test for #10571
        json = '{"dog": "собака"}'
        response = self.client.post("/test_client_regress/parse_unicode_json/", json,
                                    content_type="application/json; charset=utf-16")
        self.assertEqual(response.content, json.encode('utf-16'))

    def test_unicode_payload_non_utf(self):
        "A non-ASCII unicode data as a non-UTF based encoding can be POSTed"
        #Regression test for #10571
        json = '{"dog": "собака"}'
        response = self.client.post("/test_client_regress/parse_unicode_json/", json,
                                    content_type="application/json; charset=koi8-r")
        self.assertEqual(response.content, json.encode('koi8-r'))