import gzip

from django.http import HttpRequest, HttpResponse, StreamingHttpResponse

from django.test import SimpleTestCase

from django.test.client import conditional_content_removal

class ConditionalContentTests(SimpleTestCase):

    def test_conditional_content_removal(self):

        """

        Content is removed from regular and streaming responses with a

        status_code of 100-199, 204, 304, or a method of "HEAD".

        """

        req = HttpRequest()

        # Do nothing for 200 responses.

        res = HttpResponse("abc")

        conditional_content_removal(req, res)

        self.assertEqual(res.content, b"abc")

        res = StreamingHttpResponse(["abc"])

        conditional_content_removal(req, res)

        self.assertEqual(b"".join(res), b"abc")

        # Strip content for some status codes.

        for status_code in (100, 150, 199, 204, 304):

            res = HttpResponse("abc", status=status_code)

            conditional_content_removal(req, res)

            self.assertEqual(res.content, b"")

            res = StreamingHttpResponse(["abc"], status=status_code)

            conditional_content_removal(req, res)

            self.assertEqual(b"".join(res), b"")

        # Issue #20472

        abc = gzip.compress(b"abc")

        res = HttpResponse(abc, status=304)

        res["Content-Encoding"] = "gzip"

        conditional_content_removal(req, res)

        self.assertEqual(res.content, b"")

        res = StreamingHttpResponse([abc], status=304)

        res["Content-Encoding"] = "gzip"

        conditional_content_removal(req, res)

        self.assertEqual(b"".join(res), b"")

        # Strip content for HEAD requests.

        req.method = "HEAD"

        res = HttpResponse("abc")

        conditional_content_removal(req, res)

        self.assertEqual(res.content, b"")

        res = StreamingHttpResponse(["abc"])

        conditional_content_removal(req, res)

        self.assertEqual(b"".join(res), b"")