django/tests/regressiontests/test_client_regress/tests.py

# -*- coding: utf-8 -*-
"""
Regression tests for the Test Client, especially the customized assertions.
"""
from __future__ import unicode_literals

import os

from django.conf import settings
from django.core.exceptions import SuspiciousOperation
from django.core.urlresolvers import reverse
from django.template import (TemplateDoesNotExist, TemplateSyntaxError,
    Context, Template, loader)
import django.template.context
from django.test import Client, TestCase
from django.test.client import encode_file, RequestFactory
from django.test.utils import ContextList, override_settings, str_prefix
from django.template.response import SimpleTemplateResponse
from django.utils._os import upath
from django.utils.translation import ugettext_lazy
from django.http import HttpResponse


@override_settings(
    TEMPLATE_DIRS=(os.path.join(os.path.dirname(upath(__file__)), 'templates'),)
)
class AssertContainsTests(TestCase):
    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.assertIn("Couldn't retrieve content: Response code was 200 (expected 999)", str(e))
        try:
            self.assertContains(response, 'text', status_code=999, msg_prefix='abc')
        except AssertionError as e:
            self.assertIn("abc: Couldn't retrieve content: Response code was 200 (expected 999)", str(e))

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

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

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

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

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

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

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

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

    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, b'\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, b'\xe3\x81\xaf\xe3\x81\x9f\xe3\x81\x91'.decode('utf-8'))

    def test_nontext_contains(self):
        r = self.client.get('/test_client_regress/no_template_view/')
        self.assertContains(r, ugettext_lazy('once'))

    def test_nontext_not_contains(self):
        r = self.client.get('/test_client_regress/no_template_view/')
        self.assertNotContains(r, ugettext_lazy('never'))

    def test_assert_contains_renders_template_response(self):
        """ Test that we can pass in an unrendered SimpleTemplateReponse
            without throwing an error.
            Refs #15826.
        """
        response = SimpleTemplateResponse(Template('Hello'), status=200)
        self.assertContains(response, 'Hello')

    def test_assert_contains_using_non_template_response(self):
        """ Test that auto-rendering does not affect responses that aren't
            instances (or subclasses) of SimpleTemplateResponse.
            Refs #15826.
        """
        response = HttpResponse('Hello')
        self.assertContains(response, 'Hello')

    def test_assert_not_contains_renders_template_response(self):
        """ Test that we can pass in an unrendered SimpleTemplateReponse
            without throwing an error.
            Refs #15826.
        """
        response = SimpleTemplateResponse(Template('Hello'), status=200)
        self.assertNotContains(response, 'Bye')

    def test_assert_not_contains_using_non_template_response(self):
        """ Test that auto-rendering does not affect responses that aren't
            instances (or subclasses) of SimpleTemplateResponse.
            Refs #15826.
        """
        response = HttpResponse('Hello')
        self.assertNotContains(response, 'Bye')

@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
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.assertIn("No templates used to render the response", str(e))

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

    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.assertIn("Template 'Empty GET Template' was used unexpectedly in rendering the response", str(e))

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

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

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

    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.assertIn("Template 'form_view.html' was used unexpectedly in rendering the response", str(e))

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

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

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.assertIn("Response didn't redirect as expected: Response code was 301 (expected 302)", str(e))

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

    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.assertIn("Response redirected to 'http://testserver/test_client/get_view/?var=value', expected 'http://testserver/test_client/get_view/'", str(e))

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

    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.assertIn("Response didn't redirect as expected: Response code was 301 (expected 302)", str(e))

    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.assertIn("Couldn't retrieve redirection page '/test_client/permanent_redirect_view/': response code was 301 (expected 200)", str(e))

        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.assertIn("abc: Couldn't retrieve redirection page '/test_client/permanent_redirect_view/': response code was 301 (expected 200)", str(e))

    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.assertEqual(len(response.redirect_chain), 1)
        self.assertEqual(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.assertEqual(len(response.redirect_chain), 3)
        self.assertEqual(response.redirect_chain[0], ('http://testserver/test_client_regress/redirects/further/', 301))
        self.assertEqual(response.redirect_chain[1], ('http://testserver/test_client_regress/redirects/further/more/', 301))
        self.assertEqual(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.assertEqual(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.assertEqual(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.assertEqual(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.assertEqual(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/',
            follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEqual(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/',
            follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEqual(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/',
            follow=True)
        self.assertRedirects(response,
            '/test_client_regress/no_template_view/', 301, 200)
        self.assertEqual(len(response.redirect_chain), 3)

    def test_redirect_to_different_host(self):
        "The test client will preserve scheme, host and port changes"
        response = self.client.get('/test_client_regress/redirect_other_host/', follow=True)
        self.assertRedirects(response,
            'https://otherserver:8443/test_client_regress/no_template_view/',
            status_code=301, target_status_code=200)
        # We can't use is_secure() or get_host()
        # because response.request is a dictionary, not an HttpRequest
        self.assertEqual(response.request.get('wsgi.url_scheme'), 'https')
        self.assertEqual(response.request.get('SERVER_NAME'), 'otherserver')
        self.assertEqual(response.request.get('SERVER_PORT'), '8443')

    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.assertIn("Response didn't redirect as expected: Response code was 200 (expected 302)", str(e))

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

    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.assertIn("Response didn't redirect as expected: Response code was 200 (expected 302)", str(e))

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


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

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

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

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

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

@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
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.assertTrue(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/")


@override_settings(
    PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',),
    SESSION_ENGINE='regressiontests.test_client_regress.session'
)
class SessionEngineTests(TestCase):
    fixtures = ['testdata']

    def test_login(self):
        "A session engine that modifies the session key can be used to log in"
        login = self.client.login(username='testclient', password='password')
        self.assertTrue(login, 'Could not log in')

        # Try to access a login protected page.
        response = self.client.get("/test_client/login_protected_view/")
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.context['user'].username, 'testclient')


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(response.content, b'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(response.content, b'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(response.content, b'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(response.content, b'Hi, Arthur')

@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
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.assertTrue(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.assertTrue(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()

    @override_settings(
        TEMPLATE_DIRS=(os.path.join(os.path.dirname(upath(__file__)), 'bad_templates'),)
    )
    def test_bad_404_template(self):
        "Errors found when rendering 404 error templates are re-raised"
        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.assertEqual(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.assertEqual(url, '/test_client_regress/arg_view/somename/')

@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
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.assertTrue('get-foo' in response.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.assertEqual(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.assertTrue('get-foo' in response.context)
        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.assertEqual(e.args[0], 'does-not-exist')

    def test_15368(self):
        # Need to insert a context processor that assumes certain things about
        # the request instance. This triggers a bug caused by some ways of
        # copying RequestContext.
        try:
            django.template.context._standard_context_processors = (lambda request: {'path': request.special_path},)
            response = self.client.get("/test_client_regress/request_context_view/")
            self.assertContains(response, 'Path: /test_client_regress/request_context_view/')
        finally:
            django.template.context._standard_context_processors = None


@override_settings(PASSWORD_HASHERS=('django.contrib.auth.hashers.SHA1PasswordHasher',))
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(response.content, b'NO')

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

        # Log in
        login = self.client.login(username='testclient',password='password')
        self.assertTrue(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(response.content, b'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.assertTrue(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(response.content, b'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(response.content, b'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, b'request method: HEAD')
        self.assertEqual(response.content, b'')

    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(response.content, b'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(response.content, b'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(response.content, b'request method: DELETE')

    def test_patch(self):
        "Request a view via request method PATCH"
        response = self.client.patch('/test_client_regress/request_methods/')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.content, b'request method: PATCH')


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(response.content, b'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(response.content, b'request method: PUT')

    def test_patch(self):
        "Request a view with string data via request method PATCH"
        # Regression test for #17797
        data = '{"test": "json"}'
        response = self.client.patch('/test_client_regress/request_methods/', data=data, content_type='application/json')
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response.content, b'request method: PATCH')

class QueryStringTests(TestCase):
    def test_get_like_requests(self):
        # See: https://code.djangoproject.com/ticket/10571.
        for method_name in ('get', 'head'):
            # 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.encode())

    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'))

class DummyFile(object):
    def __init__(self, filename):
        self.name = filename
    def read(self):
        return b'TEST_FILE_CONTENT'

class UploadedFileEncodingTest(TestCase):
    def test_file_encoding(self):
        encoded_file = encode_file('TEST_BOUNDARY', 'TEST_KEY', DummyFile('test_name.bin'))
        self.assertEqual(b'--TEST_BOUNDARY', encoded_file[0])
        self.assertEqual(b'Content-Disposition: form-data; name="TEST_KEY"; filename="test_name.bin"', encoded_file[1])
        self.assertEqual(b'TEST_FILE_CONTENT', encoded_file[-1])

    def test_guesses_content_type_on_file_encoding(self):
        self.assertEqual(b'Content-Type: application/octet-stream',
                         encode_file('IGNORE', 'IGNORE', DummyFile("file.bin"))[2])
        self.assertEqual(b'Content-Type: text/plain',
                         encode_file('IGNORE', 'IGNORE', DummyFile("file.txt"))[2])
        self.assertIn(encode_file('IGNORE', 'IGNORE', DummyFile("file.zip"))[2], (
                        b'Content-Type: application/x-compress',
                        b'Content-Type: application/x-zip',
                        b'Content-Type: application/x-zip-compressed',
                        b'Content-Type: application/zip',))
        self.assertEqual(b'Content-Type: application/octet-stream',
                         encode_file('IGNORE', 'IGNORE', DummyFile("file.unknown"))[2])

class RequestHeadersTest(TestCase):
    def test_client_headers(self):
        "A test client can receive custom headers"
        response = self.client.get("/test_client_regress/check_headers/", HTTP_X_ARG_CHECK='Testing 123')
        self.assertEqual(response.content, b"HTTP_X_ARG_CHECK: Testing 123")
        self.assertEqual(response.status_code, 200)

    def test_client_headers_redirect(self):
        "Test client headers are preserved through redirects"
        response = self.client.get("/test_client_regress/check_headers_redirect/", follow=True, HTTP_X_ARG_CHECK='Testing 123')
        self.assertEqual(response.content, b"HTTP_X_ARG_CHECK: Testing 123")
        self.assertRedirects(response, '/test_client_regress/check_headers/',
            status_code=301, target_status_code=200)


class ReadLimitedStreamTest(TestCase):
    """
    Tests that ensure that HttpRequest.body, HttpRequest.read() and
    HttpRequest.read(BUFFER) have proper LimitedStream behavior.

    Refs #14753, #15785
    """

    def test_body_from_empty_request(self):
        """HttpRequest.body on a test client GET request should return
        the empty string."""
        self.assertEqual(self.client.get("/test_client_regress/body/").content, b'')

    def test_read_from_empty_request(self):
        """HttpRequest.read() on a test client GET request should return the
        empty string."""
        self.assertEqual(self.client.get("/test_client_regress/read_all/").content, b'')

    def test_read_numbytes_from_empty_request(self):
        """HttpRequest.read(LARGE_BUFFER) on a test client GET request should
        return the empty string."""
        self.assertEqual(self.client.get("/test_client_regress/read_buffer/").content, b'')

    def test_read_from_nonempty_request(self):
        """HttpRequest.read() on a test client PUT request with some payload
        should return that payload."""
        payload = b'foobar'
        self.assertEqual(self.client.put("/test_client_regress/read_all/",
                                          data=payload,
                                          content_type='text/plain').content, payload)

    def test_read_numbytes_from_nonempty_request(self):
        """HttpRequest.read(LARGE_BUFFER) on a test client PUT request with
        some payload should return that payload."""
        payload = b'foobar'
        self.assertEqual(self.client.put("/test_client_regress/read_buffer/",
                                          data=payload,
                                          content_type='text/plain').content, payload)


class RequestFactoryStateTest(TestCase):
    """Regression tests for #15929."""
    # These tests are checking that certain middleware don't change certain
    # global state. Alternatively, from the point of view of a test, they are
    # ensuring test isolation behavior. So, unusually, it doesn't make sense to
    # run the tests individually, and if any are failing it is confusing to run
    # them with any other set of tests.

    def common_test_that_should_always_pass(self):
        request = RequestFactory().get('/')
        request.session = {}
        self.assertFalse(hasattr(request, 'user'))

    def test_request(self):
        self.common_test_that_should_always_pass()

    def test_request_after_client(self):
        # apart from the next line the three tests are identical
        self.client.get('/')
        self.common_test_that_should_always_pass()

    def test_request_after_client_2(self):
        # This test is executed after the previous one
        self.common_test_that_should_always_pass()


class RequestFactoryEnvironmentTests(TestCase):
    """
    Regression tests for #8551 and #17067: ensure that environment variables
    are set correctly in RequestFactory.
    """

    def test_should_set_correct_env_variables(self):
        request = RequestFactory().get('/path/')

        self.assertEqual(request.META.get('REMOTE_ADDR'), '127.0.0.1')
        self.assertEqual(request.META.get('SERVER_NAME'), 'testserver')
        self.assertEqual(request.META.get('SERVER_PORT'), '80')
        self.assertEqual(request.META.get('SERVER_PROTOCOL'), 'HTTP/1.1')
        self.assertEqual(request.META.get('SCRIPT_NAME') +
                         request.META.get('PATH_INFO'), '/path/')