cosmopolitan/test/libc/dns/parseresolvconf_test.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8                                :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ This program is free software; you can redistribute it and/or modify         │
│ it under the terms of the GNU General Public License as published by         │
│ the Free Software Foundation; version 2 of the License.                      │
│                                                                              │
│ This program is distributed in the hope that it will be useful, but          │
│ WITHOUT ANY WARRANTY; without even the implied warranty of                   │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU             │
│ General Public License for more details.                                     │
│                                                                              │
│ You should have received a copy of the GNU General Public License            │
│ along with this program; if not, write to the Free Software                  │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA                │
│ 02110-1301 USA                                                               │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/dns/dns.h"
#include "libc/dns/hoststxt.h"
#include "libc/dns/resolvconf.h"
#include "libc/mem/mem.h"
#include "libc/sock/sock.h"
#include "libc/stdio/stdio.h"
#include "libc/str/str.h"
#include "libc/sysv/consts/af.h"
#include "libc/testlib/testlib.h"

static const char *FormatIp(struct sockaddr_in *ip) {
  static char g_ipbuf[16];
  return inet_ntop(ip->sin_family, &ip->sin_addr.s_addr, g_ipbuf, 16);
}

TEST(parseresolvconf, testEmpty) {
  struct ResolvConf *rv = calloc(1, sizeof(struct ResolvConf));
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  ASSERT_EQ(0, parseresolvconf(rv, f));
  ASSERT_EQ(0, rv->nameservers.i);
  freeresolvconf(&rv);
  fclose(f);
}

TEST(parseresolvconf, testCorrectlyTokenizes) {
  const char kInput[] = "# this is a comment\n"
                        "nameserver  203.0.113.2 \n"
                        " nameserver  203.0.113.1\n";
  struct ResolvConf *rv = calloc(1, sizeof(struct ResolvConf));
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  ASSERT_EQ(strlen(kInput), fwrite(kInput, 1, strlen(kInput), f));
  ASSERT_EQ(2, parseresolvconf(rv, f));
  ASSERT_EQ(2, rv->nameservers.i);
  EXPECT_EQ(AF_INET, rv->nameservers.p[0].sin_family);
  EXPECT_EQ(DNS_PORT, ntohs(rv->nameservers.p[0].sin_port));
  EXPECT_STREQ("203.0.113.2", FormatIp(&rv->nameservers.p[0]));
  EXPECT_EQ(AF_INET, rv->nameservers.p[1].sin_family);
  EXPECT_EQ(DNS_PORT, ntohs(rv->nameservers.p[1].sin_port));
  EXPECT_STREQ("203.0.113.1", FormatIp(&rv->nameservers.p[1]));
  freeresolvconf(&rv);
  fclose(f);
}

TEST(parseresolvconf, testMulticastDnsThing_getsIgnored) {
  const char kInput[] = "search local # boop\n";
  struct ResolvConf *rv = calloc(1, sizeof(struct ResolvConf));
  FILE *f = fmemopen(NULL, BUFSIZ, "r+");
  ASSERT_EQ(strlen(kInput), fwrite(kInput, 1, strlen(kInput), f));
  ASSERT_EQ(0, parseresolvconf(rv, f));
  ASSERT_EQ(0, rv->nameservers.i);
  freeresolvconf(&rv);
  fclose(f);
}