aria2/test/ChunkedDecodingStreamFilterTest.cc

#include "ChunkedDecodingStreamFilter.h"

#include <cstdlib>
#include <iostream>
#include <cppunit/extensions/HelperMacros.h>

#include "DlAbortEx.h"
#include "Segment.h"
#include "ByteArrayDiskWriter.h"
#include "SinkStreamFilter.h"
#include "MockSegment.h"

namespace aria2 {

class ChunkedDecodingStreamFilterTest:public CppUnit::TestFixture {

  CPPUNIT_TEST_SUITE(ChunkedDecodingStreamFilterTest);
  CPPUNIT_TEST(testTransform);
  CPPUNIT_TEST(testTransform_withoutTrailer);
  CPPUNIT_TEST(testTransform_with2Trailers);
  CPPUNIT_TEST(testTransform_largeChunkSize);
  CPPUNIT_TEST(testTransform_tooLargeChunkSize);
  CPPUNIT_TEST(testTransform_chunkSizeMismatch);
  CPPUNIT_TEST(testGetName);
  CPPUNIT_TEST_SUITE_END();

  SharedHandle<ChunkedDecodingStreamFilter> filter_;
  SharedHandle<SinkStreamFilter> sinkFilter_;
  SharedHandle<ByteArrayDiskWriter> writer_;
  SharedHandle<Segment> segment_;

  void clearWriter()
  {
    writer_->setString("");
  }
public:
  void setUp()
  {
    writer_.reset(new ByteArrayDiskWriter());
    sinkFilter_.reset(new SinkStreamFilter());
    filter_.reset(new ChunkedDecodingStreamFilter(sinkFilter_));
    sinkFilter_->init();
    filter_->init();
    segment_.reset(new MockSegment());
  }

  void testTransform();
  void testTransform_withoutTrailer();
  void testTransform_with2Trailers();
  void testTransform_largeChunkSize();
  void testTransform_tooLargeChunkSize();
  void testTransform_chunkSizeMismatch();
  void testGetName();
};


CPPUNIT_TEST_SUITE_REGISTRATION( ChunkedDecodingStreamFilterTest );

void ChunkedDecodingStreamFilterTest::testTransform()
{
  try {
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("a\r\n1234567890\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)10, r);
      CPPUNIT_ASSERT_EQUAL(std::string("1234567890"), writer_->getString());
    }
    clearWriter();
    // Feed extension; see it is ignored.
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>
        ("3;extensionIgnored\r\n123\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)3, r);
      CPPUNIT_ASSERT_EQUAL(std::string("123"), writer_->getString());
    }
    clearWriter();
    // Feed 2extensions; see it is ignored.
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>
        ("3;extension1;extension2;\r\n123\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)3, r);
      CPPUNIT_ASSERT_EQUAL(std::string("123"), writer_->getString());
    }
    clearWriter();
    // Not all chunk size is available
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("1");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
    }
    clearWriter();
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("0\r\n1234567890123456\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)16, r);
      CPPUNIT_ASSERT_EQUAL(std::string("1234567890123456"),
                           writer_->getString());
    }
    clearWriter();
    // Not all chunk data is available
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("10\r\n1234567890");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)10, r);
      CPPUNIT_ASSERT_EQUAL(std::string("1234567890"), writer_->getString());
    }
    clearWriter();
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("123456\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)6, r);
      CPPUNIT_ASSERT_EQUAL(std::string("123456"), writer_->getString());
    }
    clearWriter();
    // no trailing CR LF.
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("10\r\n1234567890123456");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)16, r);
      CPPUNIT_ASSERT_EQUAL(std::string("1234567890123456"),
                           writer_->getString());
    }
    clearWriter();
    // feed only CR
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("\r");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
    }
    // feed next LF
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
      CPPUNIT_ASSERT_EQUAL(std::string(""), writer_->getString());
    }
    // feed 0 CR LF.
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("0\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
    }
    // feed trailer
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("trailer\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
    }
    // feed final CRLF
    {
      std::basic_string<unsigned char> msg =
        reinterpret_cast<const unsigned char*>("\r\n");
      ssize_t r = filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_ASSERT_EQUAL((ssize_t)0, r);
    }
    // input is over
    CPPUNIT_ASSERT(filter_->finished());
  } catch(DlAbortEx& e) {
    CPPUNIT_FAIL(e.stackTrace());
  }
}

void ChunkedDecodingStreamFilterTest::testTransform_withoutTrailer()
{
  CPPUNIT_ASSERT_EQUAL
    ((ssize_t)0,
     filter_->transform
     (writer_, segment_,
      reinterpret_cast<const unsigned char*>("0\r\n\r\n"), 5));
  CPPUNIT_ASSERT(filter_->finished());
}

void ChunkedDecodingStreamFilterTest::testTransform_with2Trailers()
{
  CPPUNIT_ASSERT_EQUAL
    ((ssize_t)0,
     filter_->transform
     (writer_, segment_,
      reinterpret_cast<const unsigned char*>("0\r\nt1\r\nt2\r\n\r\n"), 13));
  CPPUNIT_ASSERT(filter_->finished());
}

void ChunkedDecodingStreamFilterTest::testTransform_largeChunkSize()
{
  // chunkSize should be under 2^63-1
  {
    std::basic_string<unsigned char> msg =
      reinterpret_cast<const unsigned char*>("7fffffffffffffff\r\n");
    filter_->transform(writer_, segment_, msg.data(), msg.size());
  }
}

void ChunkedDecodingStreamFilterTest::testTransform_tooLargeChunkSize()
{
  // chunkSize 2^64 causes error
  {
    std::basic_string<unsigned char> msg =
      reinterpret_cast<const unsigned char*>("ffffffffffffffff\r\n");
    try {
      filter_->transform(writer_, segment_, msg.data(), msg.size());
      CPPUNIT_FAIL("exception must be thrown.");
    } catch(DlAbortEx& e) {
      // success
    }
  }
}

void ChunkedDecodingStreamFilterTest::testTransform_chunkSizeMismatch()
{
  std::basic_string<unsigned char> msg =
    reinterpret_cast<const unsigned char*>("3\r\n1234\r\n");
  try {
    filter_->transform(writer_, segment_, msg.data(), msg.size());
    CPPUNIT_FAIL("exception must be thrown.");
  } catch(DlAbortEx& e) {
    // success
  }
}

void ChunkedDecodingStreamFilterTest::testGetName()
{
  CPPUNIT_ASSERT_EQUAL
    (std::string("ChunkedDecodingStreamFilter"), filter_->getName());
}

} // namespace aria2