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// 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/hpack/decoder/hpack_string_decoder.h"
// Tests of HpackStringDecoder.
#include "absl/strings/string_view.h"
#include "net/third_party/quiche/src/http2/hpack/decoder/hpack_string_collector.h"
#include "net/third_party/quiche/src/http2/hpack/decoder/hpack_string_decoder_listener.h"
#include "net/third_party/quiche/src/http2/hpack/tools/hpack_block_builder.h"
#include "net/third_party/quiche/src/http2/platform/api/http2_test_helpers.h"
#include "net/third_party/quiche/src/http2/test_tools/http2_random.h"
#include "net/third_party/quiche/src/http2/tools/random_decoder_test.h"
#include "net/third_party/quiche/src/common/platform/api/quiche_test.h"
using ::testing::AssertionResult;
namespace http2 {
namespace test {
namespace {
const bool kMayReturnZeroOnFirst = false;
const bool kCompressed = true;
const bool kUncompressed = false;
class HpackStringDecoderTest : public RandomDecoderTest {
protected:
HpackStringDecoderTest() : listener_(&collector_) {}
DecodeStatus StartDecoding(DecodeBuffer* b) override {
++start_decoding_calls_;
collector_.Clear();
return decoder_.Start(b, &listener_);
}
DecodeStatus ResumeDecoding(DecodeBuffer* b) override {
// Provides coverage of DebugString and StateToString.
// Not validating output.
HTTP2_VLOG(1) << decoder_.DebugString();
HTTP2_VLOG(2) << collector_;
return decoder_.Resume(b, &listener_);
}
AssertionResult Collected(absl::string_view s, bool huffman_encoded) {
HTTP2_VLOG(1) << collector_;
return collector_.Collected(s, huffman_encoded);
}
// expected_str is a std::string rather than a const std::string& or
// absl::string_view so that the lambda makes a copy of the string, and thus
// the string to be passed to Collected outlives the call to MakeValidator.
Validator MakeValidator(const std::string& expected_str,
bool expected_huffman) {
return
[expected_str, expected_huffman, this](
const DecodeBuffer& /*input*/,
DecodeStatus /*status*/) -> AssertionResult {
AssertionResult result = Collected(expected_str, expected_huffman);
if (result) {
VERIFY_EQ(collector_,
HpackStringCollector(expected_str, expected_huffman));
} else {
VERIFY_NE(collector_,
HpackStringCollector(expected_str, expected_huffman));
}
HTTP2_VLOG(2) << collector_.ToString();
collector_.Clear();
HTTP2_VLOG(2) << collector_;
return result;
};
}
HpackStringDecoder decoder_;
HpackStringCollector collector_;
HpackStringDecoderVLoggingListener listener_;
size_t start_decoding_calls_ = 0;
};
TEST_F(HpackStringDecoderTest, DecodeEmptyString) {
{
Validator validator = ValidateDoneAndEmpty(MakeValidator("", kCompressed));
const char kData[] = {'\x80'};
DecodeBuffer b(kData);
EXPECT_TRUE(
DecodeAndValidateSeveralWays(&b, kMayReturnZeroOnFirst, validator));
}
{
// Make sure it stops after decoding the empty string.
Validator validator =
ValidateDoneAndOffset(1, MakeValidator("", kUncompressed));
const char kData[] = {'\x00', '\xff'};
DecodeBuffer b(kData);
EXPECT_EQ(2u, b.Remaining());
EXPECT_TRUE(
DecodeAndValidateSeveralWays(&b, kMayReturnZeroOnFirst, validator));
EXPECT_EQ(1u, b.Remaining());
}
}
TEST_F(HpackStringDecoderTest, DecodeShortString) {
{
// Make sure it stops after decoding the non-empty string.
Validator validator =
ValidateDoneAndOffset(11, MakeValidator("start end.", kCompressed));
const char kData[] = "\x8astart end.Don't peek at this.";
DecodeBuffer b(kData);
EXPECT_TRUE(
DecodeAndValidateSeveralWays(&b, kMayReturnZeroOnFirst, validator));
}
{
Validator validator =
ValidateDoneAndOffset(11, MakeValidator("start end.", kUncompressed));
absl::string_view data("\x0astart end.");
DecodeBuffer b(data);
EXPECT_TRUE(
DecodeAndValidateSeveralWays(&b, kMayReturnZeroOnFirst, validator));
}
}
TEST_F(HpackStringDecoderTest, DecodeLongStrings) {
std::string name = Random().RandString(1024);
std::string value = Random().RandString(65536);
HpackBlockBuilder hbb;
hbb.AppendString(false, name);
uint32_t offset_after_name = hbb.size();
EXPECT_EQ(3 + name.size(), offset_after_name);
hbb.AppendString(true, value);
uint32_t offset_after_value = hbb.size();
EXPECT_EQ(3 + name.size() + 4 + value.size(), offset_after_value);
DecodeBuffer b(hbb.buffer());
// Decode the name...
EXPECT_TRUE(DecodeAndValidateSeveralWays(
&b, kMayReturnZeroOnFirst,
ValidateDoneAndOffset(offset_after_name,
MakeValidator(name, kUncompressed))));
EXPECT_EQ(offset_after_name, b.Offset());
EXPECT_EQ(offset_after_value - offset_after_name, b.Remaining());
// Decode the value...
EXPECT_TRUE(DecodeAndValidateSeveralWays(
&b, kMayReturnZeroOnFirst,
ValidateDoneAndOffset(offset_after_value - offset_after_name,
MakeValidator(value, kCompressed))));
EXPECT_EQ(offset_after_value, b.Offset());
EXPECT_EQ(0u, b.Remaining());
}
} // namespace
} // namespace test
} // namespace http2
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