text: // Copyright 2016 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/third_party/quiche/src/http2/decoder/payload_decoders/ping_payload_decoder.h"
  
  #include <stddef.h>
  
  #include "testing/gtest/include/gtest/gtest.h"
  #include "net/third_party/quiche/src/http2/decoder/http2_frame_decoder_listener.h"
  #include "net/third_party/quiche/src/http2/decoder/payload_decoders/payload_decoder_base_test_util.h"
  #include "net/third_party/quiche/src/http2/http2_constants.h"
  #include "net/third_party/quiche/src/http2/http2_structures_test_util.h"
  #include "net/third_party/quiche/src/http2/platform/api/http2_logging.h"
  #include "net/third_party/quiche/src/http2/test_tools/frame_parts.h"
  #include "net/third_party/quiche/src/http2/test_tools/frame_parts_collector.h"
  #include "net/third_party/quiche/src/http2/test_tools/http2_random.h"
  #include "net/third_party/quiche/src/http2/tools/http2_frame_builder.h"
  #include "net/third_party/quiche/src/http2/tools/random_decoder_test.h"
  
  namespace http2 {
  namespace test {
  
  class PingPayloadDecoderPeer {
   public:
    static constexpr Http2FrameType FrameType() { return Http2FrameType::PING; }
  
    // Returns the mask of flags that affect the decoding of the payload (i.e.
    // flags that that indicate the presence of certain fields or padding).
    static constexpr uint8_t FlagsAffectingPayloadDecoding() { return 0; }
  };
  
  namespace {
  
  struct Listener : public FramePartsCollector {
    void OnPing(const Http2FrameHeader& header,
                const Http2PingFields& ping) override {
      HTTP2_VLOG(1) << "OnPing: " << header << "; " << ping;
      StartAndEndFrame(header)->OnPing(header, ping);
    }
  
    void OnPingAck(const Http2FrameHeader& header,
                   const Http2PingFields& ping) override {
      HTTP2_VLOG(1) << "OnPingAck: " << header << "; " << ping;
      StartAndEndFrame(header)->OnPingAck(header, ping);
    }
  
    void OnFrameSizeError(const Http2FrameHeader& header) override {
      HTTP2_VLOG(1) << "OnFrameSizeError: " << header;
      FrameError(header)->OnFrameSizeError(header);
    }
  };
  
  class PingPayloadDecoderTest
      : public AbstractPayloadDecoderTest<PingPayloadDecoder,
                                          PingPayloadDecoderPeer,
                                          Listener> {
   protected:
    Http2PingFields RandPingFields() {
      Http2PingFields fields;
      test::Randomize(&fields, RandomPtr());
      return fields;
    }
  };
  
  // Confirm we get an error if the payload is not the correct size to hold
  // exactly one Http2PingFields.
  TEST_F(PingPayloadDecoderTest, WrongSize) {
    auto approve_size = [](size_t size) {
      return size != Http2PingFields::EncodedSize();
    };
    Http2FrameBuilder fb;
    fb.Append(RandPingFields());
    fb.Append(RandPingFields());
    fb.Append(RandPingFields());
    EXPECT_TRUE(VerifyDetectsFrameSizeError(0, fb.buffer(), approve_size));
  }
  
  TEST_F(PingPayloadDecoderTest, Ping) {
    for (int n = 0; n < 100; ++n) {
      Http2PingFields fields = RandPingFields();
      Http2FrameBuilder fb;
      fb.Append(fields);
      Http2FrameHeader header(fb.size(), Http2FrameType::PING,
                              RandFlags() & ~Http2FrameFlag::ACK, RandStreamId());
      set_frame_header(header);
      FrameParts expected(header);
      expected.SetOptPing(fields);
      EXPECT_TRUE(DecodePayloadAndValidateSeveralWays(fb.buffer(), expected));
    }
  }
  
  TEST_F(PingPayloadDecoderTest, PingAck) {
    for (int n = 0; n < 100; ++n) {
      Http2PingFields fields;
      Randomize(&fields, RandomPtr());
      Http2FrameBuilder fb;
      fb.Append(fields);
      Http2FrameHeader header(fb.size(), Http2FrameType::PING,
                              RandFlags() | Http2FrameFlag::ACK, RandStreamId());
      set_frame_header(header);
      FrameParts expected(header);
      expected.SetOptPing(fields);
      EXPECT_TRUE(DecodePayloadAndValidateSeveralWays(fb.buffer(), expected));
    }
  }
  
  }  // namespace
  }  // namespace test
  }  // namespace http2
  