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"")