// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "net/dns/dns_query.h"

#include "net/base/io_buffer.h"
#include "net/dns/dns_protocol.h"
#include "testing/gtest/include/gtest/gtest.h"

namespace net {

namespace {

TEST(DnsQueryTest, Constructor) {
  // This includes \0 at the end.
  const char qname_data[] = "\x03""www""\x07""example""\x03""com";
  const uint8 query_data[] = {
    // Header
    0xbe, 0xef,
    0x01, 0x00,               // Flags -- set RD (recursion desired) bit.
    0x00, 0x01,               // Set QDCOUNT (question count) to 1, all the
                              // rest are 0 for a query.
    0x00, 0x00,
    0x00, 0x00,
    0x00, 0x00,

    // Question
    0x03, 'w', 'w', 'w',      // QNAME: www.example.com in DNS format.
    0x07, 'e', 'x', 'a', 'm', 'p', 'l', 'e',
    0x03, 'c', 'o', 'm',
    0x00,

    0x00, 0x01,               // QTYPE: A query.
    0x00, 0x01,               // QCLASS: IN class.
  };

  base::StringPiece qname(qname_data, sizeof(qname_data));
  DnsQuery q1(0xbeef, qname, dns_protocol::kTypeA);
  EXPECT_EQ(dns_protocol::kTypeA, q1.qtype());

  ASSERT_EQ(static_cast<int>(sizeof(query_data)), q1.io_buffer()->size());
  EXPECT_EQ(0, memcmp(q1.io_buffer()->data(), query_data, sizeof(query_data)));
  EXPECT_EQ(qname, q1.qname());

  base::StringPiece question(reinterpret_cast<const char*>(query_data) + 12,
                             21);
  EXPECT_EQ(question, q1.question());
}

TEST(DnsQueryTest, Clone) {
  // This includes \0 at the end.
  const char qname_data[] = "\x03""www""\x07""example""\x03""com";
  base::StringPiece qname(qname_data, sizeof(qname_data));

  DnsQuery q1(0, qname, dns_protocol::kTypeA);
  EXPECT_EQ(0, q1.id());
  scoped_ptr<DnsQuery> q2(q1.CloneWithNewId(42));
  EXPECT_EQ(42, q2->id());
  EXPECT_EQ(q1.io_buffer()->size(), q2->io_buffer()->size());
  EXPECT_EQ(q1.qtype(), q2->qtype());
  EXPECT_EQ(q1.question(), q2->question());
}

}  // namespace

}  // namespace net