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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 "third_party/blink/renderer/core/html/parser/html_document_parser.h"
#include <memory>
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/renderer/core/html/html_document.h"
#include "third_party/blink/renderer/core/html/parser/text_resource_decoder.h"
#include "third_party/blink/renderer/core/html/parser/text_resource_decoder_builder.h"
#include "third_party/blink/renderer/core/loader/prerenderer_client.h"
#include "third_party/blink/renderer/core/testing/page_test_base.h"
#include "third_party/blink/renderer/platform/heap/heap.h"
#include "third_party/blink/renderer/platform/testing/unit_test_helpers.h"
namespace blink {
namespace {
class MockPrerendererClient : public PrerendererClient {
public:
MockPrerendererClient(Page& page, bool is_prefetch_only)
: PrerendererClient(page, nullptr), is_prefetch_only_(is_prefetch_only) {}
private:
bool IsPrefetchOnly() override { return is_prefetch_only_; }
bool is_prefetch_only_;
};
class HTMLDocumentParserTest
: public PageTestBase,
public testing::WithParamInterface<
testing::tuple<ParserSynchronizationPolicy, int>> {
protected:
void SetUp() override {
PageTestBase::SetUp();
GetDocument().SetURL(KURL("https://example.test"));
ParserSynchronizationPolicy policy = testing::get<0>(GetParam());
if (policy == ParserSynchronizationPolicy::kForceSynchronousParsing) {
Document::SetThreadedParsingEnabledForTesting(false);
} else {
Document::SetThreadedParsingEnabledForTesting(true);
}
if (policy == ParserSynchronizationPolicy::kAllowDeferredParsing) {
RuntimeEnabledFeatures::SetForceSynchronousHTMLParsingEnabled(true);
} else if (policy ==
ParserSynchronizationPolicy::kAllowAsynchronousParsing) {
RuntimeEnabledFeatures::SetForceSynchronousHTMLParsingEnabled(false);
}
}
HTMLDocumentParser* CreateParser(HTMLDocument& document) {
auto* parser = MakeGarbageCollected<HTMLDocumentParser>(
document, testing::get<0>(GetParam()));
parser->SetMaxTokenizationBudgetForTesting(testing::get<1>(GetParam()));
std::unique_ptr<TextResourceDecoder> decoder(
BuildTextResourceDecoderFor(&document, "text/html", g_null_atom));
parser->SetDecoder(std::move(decoder));
return parser;
}
};
} // namespace
INSTANTIATE_TEST_SUITE_P(
HTMLDocumentParserTest,
HTMLDocumentParserTest,
testing::Combine(testing::Values(kForceSynchronousParsing,
kAllowDeferredParsing),
testing::Values(250, 500, 1000)));
TEST_P(HTMLDocumentParserTest, StopThenPrepareToStopShouldNotCrash) {
auto& document = To<HTMLDocument>(GetDocument());
DocumentParser* parser = CreateParser(document);
const char kBytes[] = "<html>";
parser->AppendBytes(kBytes, sizeof(kBytes));
// These methods are not supposed to be called one after the other, but in
// practice it can happen (e.g. if navigation is aborted).
parser->StopParsing();
parser->PrepareToStopParsing();
}
TEST_P(HTMLDocumentParserTest, HasNoPendingWorkAfterStopParsing) {
auto& document = To<HTMLDocument>(GetDocument());
HTMLDocumentParser* parser = CreateParser(document);
DocumentParser* control_parser = static_cast<DocumentParser*>(parser);
const char kBytes[] = "<html>";
control_parser->AppendBytes(kBytes, sizeof(kBytes));
control_parser->StopParsing();
EXPECT_FALSE(parser->HasPendingWorkScheduledForTesting());
}
TEST_P(HTMLDocumentParserTest, HasNoPendingWorkAfterStopParsingThenAppend) {
auto& document = To<HTMLDocument>(GetDocument());
HTMLDocumentParser* parser = CreateParser(document);
DocumentParser* control_parser = static_cast<DocumentParser*>(parser);
const char kBytes1[] = "<html>";
control_parser->AppendBytes(kBytes1, sizeof(kBytes1));
control_parser->StopParsing();
const char kBytes2[] = "<head>";
control_parser->AppendBytes(kBytes2, sizeof(kBytes2));
EXPECT_FALSE(parser->HasPendingWorkScheduledForTesting());
}
TEST_P(HTMLDocumentParserTest, HasNoPendingWorkAfterDetach) {
auto& document = To<HTMLDocument>(GetDocument());
HTMLDocumentParser* parser = CreateParser(document);
DocumentParser* control_parser = static_cast<DocumentParser*>(parser);
const char kBytes[] = "<html>";
control_parser->AppendBytes(kBytes, sizeof(kBytes));
control_parser->Detach();
EXPECT_FALSE(parser->HasPendingWorkScheduledForTesting());
}
TEST_P(HTMLDocumentParserTest, AppendPrefetch) {
auto& document = To<HTMLDocument>(GetDocument());
ProvidePrerendererClientTo(
*document.GetPage(),
MakeGarbageCollected<MockPrerendererClient>(*document.GetPage(), true));
EXPECT_TRUE(document.IsPrefetchOnly());
HTMLDocumentParser* parser = CreateParser(document);
const char kBytes[] = "<ht";
parser->AppendBytes(kBytes, sizeof(kBytes));
// The bytes are forwarded to the preload scanner, not to the tokenizer.
HTMLParserScriptRunnerHost* script_runner_host =
parser->AsHTMLParserScriptRunnerHostForTesting();
EXPECT_TRUE(script_runner_host->HasPreloadScanner());
EXPECT_EQ(HTMLTokenizer::kDataState, parser->Tokenizer()->GetState());
// Finishing should not cause parsing to start (verified via an internal
// DCHECK).
static_cast<DocumentParser*>(parser)->Finish();
EXPECT_EQ(HTMLTokenizer::kDataState, parser->Tokenizer()->GetState());
// Cancel any pending work to make sure that RuntimeFeatures DCHECKs do not
// fire.
(static_cast<DocumentParser*>(parser))->StopParsing();
}
TEST_P(HTMLDocumentParserTest, AppendNoPrefetch) {
auto& document = To<HTMLDocument>(GetDocument());
EXPECT_FALSE(document.IsPrefetchOnly());
// Use ForceSynchronousParsing to allow calling append().
HTMLDocumentParser* parser = CreateParser(document);
const char kBytes[] = "<ht";
parser->AppendBytes(kBytes, sizeof(kBytes));
test::RunPendingTasks();
// The bytes are forwarded to the tokenizer.
HTMLParserScriptRunnerHost* script_runner_host =
parser->AsHTMLParserScriptRunnerHostForTesting();
EXPECT_FALSE(script_runner_host->HasPreloadScanner());
EXPECT_EQ(HTMLTokenizer::kTagNameState, parser->Tokenizer()->GetState());
// Cancel any pending work to make sure that RuntimeFeatures DCHECKs do not
// fire.
(static_cast<DocumentParser*>(parser))->StopParsing();
}
} // namespace blink
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