Add tests for HEAD methods

test/with_dummyserver/test_socketlevel.py

@@ -616,3 +616,33 @@ def test_httplib_headers_case_insensitive(self):
         HEADERS = {'Content-Length': '0', 'Content-type': 'text/plain'}
         r = pool.request('GET', '/')
         self.assertEqual(HEADERS, dict(r.headers.items())) # to preserve case sensitivity
+
+
+class TestHEAD(SocketDummyServerTestCase):
+    def test_chunked_head_response_does_not_hang(self):
+        handler = create_response_handler(
+           b'HTTP/1.1 200 OK\r\n'
+           b'Transfer-Encoding: chunked\r\n'
+           b'Content-type: text/plain\r\n'
+           b'\r\n'
+        )
+        self._start_server(handler)
+        pool = HTTPConnectionPool(self.host, self.port, retries=False)
+        r = pool.request('HEAD', '/', timeout=1, preload_content=False)
+
+        # stream will use the read_chunked method here.
+        self.assertEqual([], list(r.stream()))
+
+    def test_empty_head_response_does_not_hang(self):
+        handler = create_response_handler(
+           b'HTTP/1.1 200 OK\r\n'
+           b'Content-Length: 256\r\n'
+           b'Content-type: text/plain\r\n'
+           b'\r\n'
+        )
+        self._start_server(handler)
+        pool = HTTPConnectionPool(self.host, self.port, retries=False)
+        r = pool.request('HEAD', '/', timeout=1, preload_content=False)
+
+        # stream will use the read method here.
+        self.assertEqual([], list(r.stream()))