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// Copyright (C) 2010 Internet Systems Consortium, Inc. ("ISC")
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice appear in all copies.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
// REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
// AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
// INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
// LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
// OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
// PERFORMANCE OF THIS SOFTWARE.
#include <vector>
#include <sstream>
#include <exceptions/exceptions.h>
#include <util/io/buffer.h>
#include <dns/exceptions.h>
#include <dns/messagerenderer.h>
#include <dns/name.h>
#include <dns/question.h>
#include <dns/rrclass.h>
#include <dns/rrtype.h>
#include <gtest/gtest.h>
#include <dns/tests/unittest_util.h>
using isc::UnitTestUtil;
using namespace std;
using namespace isc::dns;
using namespace isc::util::io;
namespace {
class QuestionTest : public ::testing::Test {
protected:
QuestionTest() : obuffer(0), renderer(obuffer),
example_name1(Name("foo.example.com")),
example_name2(Name("bar.example.com")),
test_question1(example_name1, RRClass::IN(),
RRType::NS()),
test_question2(example_name2, RRClass::CH(),
RRType::A())
{}
OutputBuffer obuffer;
MessageRenderer renderer;
Name example_name1;
Name example_name2;
Question test_question1;
Question test_question2;
vector<unsigned char> wiredata;
};
Question
questionFromWire(const char* datafile, size_t position = 0) {
vector<unsigned char> data;
UnitTestUtil::readWireData(datafile, data);
InputBuffer buffer(&data[0], data.size());
buffer.setPosition(position);
return (Question(buffer));
}
TEST_F(QuestionTest, fromWire) {
Question q = questionFromWire("question_fromWire");
EXPECT_EQ(example_name1, q.getName());
EXPECT_EQ(RRClass::IN(), q.getClass());
EXPECT_EQ(RRType::NS(), q.getType());
// owner name of the second Question is compressed. It's uncommon
// (to have multiple questions), but isn't prohibited by the protocol.
q = questionFromWire("question_fromWire", 21);
EXPECT_EQ(example_name2, q.getName());
EXPECT_EQ(RRClass::CH(), q.getClass());
EXPECT_EQ(RRType::A(), q.getType());
// Pathological cases: Corresponding exceptions will be thrown from
// the underlying parser.
EXPECT_THROW(questionFromWire("question_fromWire", 31), DNSMessageFORMERR);
EXPECT_THROW(questionFromWire("question_fromWire", 36), IncompleteRRClass);
}
TEST_F(QuestionTest, toText) {
EXPECT_EQ("foo.example.com. IN NS\n", test_question1.toText());
EXPECT_EQ("bar.example.com. CH A\n", test_question2.toText());
}
TEST_F(QuestionTest, toWireBuffer) {
test_question1.toWire(obuffer);
test_question2.toWire(obuffer);
UnitTestUtil::readWireData("question_toWire1", wiredata);
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, obuffer.getData(),
obuffer.getLength(), &wiredata[0], wiredata.size());
}
TEST_F(QuestionTest, toWireRenderer) {
test_question1.toWire(renderer);
test_question2.toWire(renderer);
UnitTestUtil::readWireData("question_toWire2", wiredata);
EXPECT_PRED_FORMAT4(UnitTestUtil::matchWireData, obuffer.getData(),
obuffer.getLength(), &wiredata[0], wiredata.size());
}
// test operator<<. We simply confirm it appends the result of toText().
TEST_F(QuestionTest, LeftShiftOperator) {
ostringstream oss;
oss << test_question1;
EXPECT_EQ(test_question1.toText(), oss.str());
}
TEST_F(QuestionTest, comparison) {
const Name a("a"), b("b");
const RRClass in(RRClass::IN()), ch(RRClass::CH());
const RRType ns(RRType::NS()), aaaa(RRType::AAAA());
EXPECT_TRUE(Question(a, in, ns) < Question(a, in, aaaa));
EXPECT_FALSE(Question(a, in, aaaa) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(a, ch, ns));
EXPECT_FALSE(Question(a, ch, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(a, ch, aaaa));
EXPECT_FALSE(Question(a, ch, aaaa) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, in, ns));
EXPECT_FALSE(Question(a, in, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, ch, ns));
EXPECT_FALSE(Question(b, ch, ns) < Question(a, in, ns));
EXPECT_TRUE(Question(a, in, ns) < Question(b, ch, aaaa));
EXPECT_FALSE(Question(b, ch, aaaa) < Question(a, in, ns));
EXPECT_FALSE(Question(a, in, ns) < Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, ns) < Question(a, ch, ns));
EXPECT_FALSE(Question(b, in, ns) < Question(b, in, ns));
EXPECT_FALSE(Question(b, in, aaaa) < Question(b, in, aaaa));
// Identical questions are equal
EXPECT_TRUE(Question(a, in, ns) == Question(a, in, ns));
EXPECT_FALSE(Question(a, in, ns) != Question(a, in, ns));
// Components differing by one component are unequal...
EXPECT_FALSE(Question(b, in, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(b, in, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(a, ch, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(a, in, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(a, in, aaaa) != Question(a, in, ns));
// ... as are those differing by two components
EXPECT_FALSE(Question(b, ch, ns) == Question(a, in, ns));
EXPECT_TRUE(Question(b, ch, ns) != Question(a, in, ns));
EXPECT_FALSE(Question(b, in, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(b, in, aaaa) != Question(a, in, ns));
EXPECT_FALSE(Question(a, ch, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(a, ch, aaaa) != Question(a, in, ns));
// ... and question differing by all three
EXPECT_FALSE(Question(b, ch, aaaa) == Question(a, in, ns));
EXPECT_TRUE(Question(b, ch, aaaa) != Question(a, in, ns));
}
}
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