Add new HTTP/2 and HPACK decoder in net/http2/.

net/http2/decoder/payload_decoders/payload_decoder_base_test_util.cc

Index: net/http2/decoder/payload_decoders/payload_decoder_base_test_util.cc
diff --git a/net/http2/decoder/payload_decoders/payload_decoder_base_test_util.cc b/net/http2/decoder/payload_decoders/payload_decoder_base_test_util.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d96d481b63ed86e9abf3d3bbb9987858119cb5d3
--- /dev/null
+++ b/net/http2/decoder/payload_decoders/payload_decoder_base_test_util.cc
@@ -0,0 +1,98 @@
+// 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/http2/decoder/payload_decoders/payload_decoder_base_test_util.h"
+
+#include "net/http2/decoder/frame_decoder_state_test_util.h"
+#include "net/http2/http2_structures_test_util.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace test {
+PayloadDecoderBaseTest::PayloadDecoderBaseTest() {
+  // If the test adds more data after the frame payload,
+  // stop as soon as the payload is decoded.
+  stop_decode_on_done_ = true;
+  frame_header_is_set_ = false;
+  Randomize(&frame_header_, RandomPtr());
+}
+
+DecodeStatus PayloadDecoderBaseTest::StartDecoding(DecodeBuffer* db) {
+  DVLOG(2) << "StartDecoding, db->Remaining=" << db->Remaining();
+  // Make sure sub-class has set frame_header_ so that we can inject it
+  // into the payload decoder below.
+  if (!frame_header_is_set_) {
+    ADD_FAILURE() << "frame_header_ is not set";
+    return DecodeStatus::kDecodeError;
+  }
+  // The contract with the payload decoders is that they won't receive a
+  // decode buffer that extends beyond the end of the frame.
+  if (db->Remaining() > frame_header_.payload_length) {
+    ADD_FAILURE() << "DecodeBuffer has too much data: " << db->Remaining()
+                  << " > " << frame_header_.payload_length;
+    return DecodeStatus::kDecodeError;
+  }
+
+  // Prepare the payload decoder.
+  PreparePayloadDecoder();
+
+  // Reconstruct the FrameDecoderState, prepare the listener, and add it to
+  // the FrameDecoderState.
+  frame_decoder_state_.~FrameDecoderState();
+  new (&frame_decoder_state_) FrameDecoderState;
+  frame_decoder_state_.set_listener(PrepareListener());
+
+  // Make sure that a listener was provided.
+  if (frame_decoder_state_.listener() == nullptr) {
+    ADD_FAILURE() << "PrepareListener must return a listener.";
+    return DecodeStatus::kDecodeError;
+  }
+
+  // Now that nothing in the payload decoder should be valid, inject the
+  // Http2FrameHeader whose payload we're about to decode. That header is the
+  // only state that a payload decoder should expect is valid when its Start
+  // method is called.
+  FrameDecoderStatePeer::set_frame_header(frame_header_, &frame_decoder_state_);
+  DecodeStatus status = StartDecodingPayload(db);
+  if (status != DecodeStatus::kDecodeInProgress) {
+    // Keep track of this so that a concrete test can verify that both fast
+    // and slow decoding paths have been tested.
+    ++fast_decode_count_;
+  }
+  return status;
+}
+
+DecodeStatus PayloadDecoderBaseTest::ResumeDecoding(DecodeBuffer* db) {
+  DVLOG(2) << "ResumeDecoding, db->Remaining=" << db->Remaining();
+  DecodeStatus status = ResumeDecodingPayload(db);
+  if (status != DecodeStatus::kDecodeInProgress) {
+    // Keep track of this so that a concrete test can verify that both fast
+    // and slow decoding paths have been tested.
+    ++slow_decode_count_;
+  }
+  return status;
+}
+
+::testing::AssertionResult
+PayloadDecoderBaseTest::DecodePayloadAndValidateSeveralWays(
+    base::StringPiece payload,
+    Validator validator) {
+  VERIFY_TRUE(frame_header_is_set_);
+  // Cap the payload to be decoded at the declared payload length. This is
+  // required by the decoders' preconditions; they are designed on the
+  // assumption that they're never passed more than they're permitted to
+  // consume.
+  // Note that it is OK if the payload is too short; the validator may be
+  // designed to check for that.
+  if (payload.size() > frame_header_.payload_length) {
+    payload = base::StringPiece(payload.data(), frame_header_.payload_length);
+  }
+  DecodeBuffer db(payload);
+  ResetDecodeSpeedCounters();
+  const bool kMayReturnZeroOnFirst = false;
+  return DecodeAndValidateSeveralWays(&db, kMayReturnZeroOnFirst, validator);
+}
+
+}  // namespace test
+}  // namespace net