Fixed problem with connection close

test/test.cc

@@ -393,6 +393,7 @@ TEST_F(ServerTest, GetMethod200)
     EXPECT_EQ("HTTP/1.1", res->version);
     EXPECT_EQ(200, res->status);
     EXPECT_EQ("text/plain", res->get_header_value("Content-Type"));
+    EXPECT_EQ("close", res->get_header_value("Connection"));
     EXPECT_EQ("Hello World!", res->body);
 }