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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "net/http2/decoder/payload_decoders/payload_decoder_base_test_util.h" |
| 6 |
| 7 #include "net/http2/decoder/frame_decoder_state_test_util.h" |
| 8 #include "net/http2/http2_structures_test_util.h" |
| 9 #include "testing/gtest/include/gtest/gtest.h" |
| 10 |
| 11 namespace net { |
| 12 namespace test { |
| 13 PayloadDecoderBaseTest::PayloadDecoderBaseTest() { |
| 14 // If the test adds more data after the frame payload, |
| 15 // stop as soon as the payload is decoded. |
| 16 stop_decode_on_done_ = true; |
| 17 frame_header_is_set_ = false; |
| 18 Randomize(&frame_header_, RandomPtr()); |
| 19 } |
| 20 |
| 21 DecodeStatus PayloadDecoderBaseTest::StartDecoding(DecodeBuffer* db) { |
| 22 DVLOG(2) << "StartDecoding, db->Remaining=" << db->Remaining(); |
| 23 // Make sure sub-class has set frame_header_ so that we can inject it |
| 24 // into the payload decoder below. |
| 25 if (!frame_header_is_set_) { |
| 26 ADD_FAILURE() << "frame_header_ is not set"; |
| 27 return DecodeStatus::kDecodeError; |
| 28 } |
| 29 // The contract with the payload decoders is that they won't receive a |
| 30 // decode buffer that extends beyond the end of the frame. |
| 31 if (db->Remaining() > frame_header_.payload_length) { |
| 32 ADD_FAILURE() << "DecodeBuffer has too much data: " << db->Remaining() |
| 33 << " > " << frame_header_.payload_length; |
| 34 return DecodeStatus::kDecodeError; |
| 35 } |
| 36 |
| 37 // Prepare the payload decoder. |
| 38 PreparePayloadDecoder(); |
| 39 |
| 40 // Reconstruct the FrameDecoderState, prepare the listener, and add it to |
| 41 // the FrameDecoderState. |
| 42 frame_decoder_state_.~FrameDecoderState(); |
| 43 new (&frame_decoder_state_) FrameDecoderState; |
| 44 frame_decoder_state_.set_listener(PrepareListener()); |
| 45 |
| 46 // Make sure that a listener was provided. |
| 47 if (frame_decoder_state_.listener() == nullptr) { |
| 48 ADD_FAILURE() << "PrepareListener must return a listener."; |
| 49 return DecodeStatus::kDecodeError; |
| 50 } |
| 51 |
| 52 // Now that nothing in the payload decoder should be valid, inject the |
| 53 // Http2FrameHeader whose payload we're about to decode. That header is the |
| 54 // only state that a payload decoder should expect is valid when its Start |
| 55 // method is called. |
| 56 FrameDecoderStatePeer::set_frame_header(frame_header_, &frame_decoder_state_); |
| 57 DecodeStatus status = StartDecodingPayload(db); |
| 58 if (status != DecodeStatus::kDecodeInProgress) { |
| 59 // Keep track of this so that a concrete test can verify that both fast |
| 60 // and slow decoding paths have been tested. |
| 61 ++fast_decode_count_; |
| 62 } |
| 63 return status; |
| 64 } |
| 65 |
| 66 DecodeStatus PayloadDecoderBaseTest::ResumeDecoding(DecodeBuffer* db) { |
| 67 DVLOG(2) << "ResumeDecoding, db->Remaining=" << db->Remaining(); |
| 68 DecodeStatus status = ResumeDecodingPayload(db); |
| 69 if (status != DecodeStatus::kDecodeInProgress) { |
| 70 // Keep track of this so that a concrete test can verify that both fast |
| 71 // and slow decoding paths have been tested. |
| 72 ++slow_decode_count_; |
| 73 } |
| 74 return status; |
| 75 } |
| 76 |
| 77 ::testing::AssertionResult |
| 78 PayloadDecoderBaseTest::DecodePayloadAndValidateSeveralWays( |
| 79 base::StringPiece payload, |
| 80 Validator validator) { |
| 81 VERIFY_TRUE(frame_header_is_set_); |
| 82 // Cap the payload to be decoded at the declared payload length. This is |
| 83 // required by the decoders' preconditions; they are designed on the |
| 84 // assumption that they're never passed more than they're permitted to |
| 85 // consume. |
| 86 // Note that it is OK if the payload is too short; the validator may be |
| 87 // designed to check for that. |
| 88 if (payload.size() > frame_header_.payload_length) { |
| 89 payload = base::StringPiece(payload.data(), frame_header_.payload_length); |
| 90 } |
| 91 DecodeBuffer db(payload); |
| 92 ResetDecodeSpeedCounters(); |
| 93 const bool kMayReturnZeroOnFirst = false; |
| 94 return DecodeAndValidateSeveralWays(&db, kMayReturnZeroOnFirst, validator); |
| 95 } |
| 96 |
| 97 } // namespace test |
| 98 } // namespace net |
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