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// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/extensions/api/declarative_content/chrome_content_rules_registry.h"
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/test/values_test_util.h"
#include "chrome/browser/extensions/api/declarative_content/content_predicate.h"
#include "chrome/browser/extensions/api/declarative_content/content_predicate_evaluator.h"
#include "chrome/browser/extensions/test_extension_environment.h"
#include "chrome/test/base/testing_profile.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/mock_navigation_handle.h"
#include "content/public/test/test_renderer_host.h"
#include "extensions/buildflags/buildflags.h"
#include "extensions/common/extension.h"
#include "testing/gtest/include/gtest/gtest.h"
static_assert(BUILDFLAG(ENABLE_EXTENSIONS_CORE));
namespace extensions {
namespace {
class TestPredicateEvaluator;
class TestPredicate : public ContentPredicate {
public:
explicit TestPredicate(ContentPredicateEvaluator* evaluator)
: evaluator_(evaluator) {
}
TestPredicate(const TestPredicate&) = delete;
TestPredicate& operator=(const TestPredicate&) = delete;
ContentPredicateEvaluator* GetEvaluator() const override {
return evaluator_;
}
private:
raw_ptr<ContentPredicateEvaluator, DanglingUntriaged> evaluator_;
};
class TestPredicateEvaluator : public ContentPredicateEvaluator {
public:
explicit TestPredicateEvaluator(ContentPredicateEvaluator::Delegate* delegate)
: delegate_(delegate),
contents_for_next_operation_evaluation_(nullptr),
next_evaluation_result_(false) {
}
TestPredicateEvaluator(const TestPredicateEvaluator&) = delete;
TestPredicateEvaluator& operator=(const TestPredicateEvaluator&) = delete;
std::string GetPredicateApiAttributeName() const override {
return "test_predicate";
}
std::unique_ptr<const ContentPredicate> CreatePredicate(
const Extension* extension,
const base::Value& value,
std::string* error) override {
RequestEvaluationIfSpecified();
return std::make_unique<TestPredicate>(this);
}
void TrackPredicates(
const std::map<const void*,
std::vector<const ContentPredicate*>>& predicates) override {
RequestEvaluationIfSpecified();
}
void StopTrackingPredicates(
const std::vector<const void*>& predicate_groups) override {
RequestEvaluationIfSpecified();
}
void TrackForWebContents(content::WebContents* contents) override {
RequestEvaluationIfSpecified();
}
void OnWebContentsNavigation(
content::WebContents* contents,
content::NavigationHandle* navigation_handle) override {
RequestEvaluationIfSpecified();
}
void OnWatchedPageChanged(
content::WebContents* contents,
const std::vector<std::string>& css_selectors) override {
RequestEvaluationIfSpecified();
}
bool EvaluatePredicate(const ContentPredicate* predicate,
content::WebContents* tab) const override {
bool result = next_evaluation_result_;
next_evaluation_result_ = false;
return result;
}
void RequestImmediateEvaluation(content::WebContents* contents,
bool evaluation_result) {
next_evaluation_result_ = evaluation_result;
delegate_->NotifyPredicateStateUpdated(contents);
}
void RequestEvaluationOnNextOperation(content::WebContents* contents,
bool evaluation_result) {
contents_for_next_operation_evaluation_ = contents;
next_evaluation_result_ = evaluation_result;
}
private:
void RequestEvaluationIfSpecified() {
if (contents_for_next_operation_evaluation_) {
delegate_->NotifyPredicateStateUpdated(
contents_for_next_operation_evaluation_);
}
contents_for_next_operation_evaluation_ = nullptr;
}
raw_ptr<ContentPredicateEvaluator::Delegate> delegate_;
raw_ptr<content::WebContents> contents_for_next_operation_evaluation_;
mutable bool next_evaluation_result_;
};
// Create the test evaluator and set |evaluator| to its pointer.
std::vector<std::unique_ptr<ContentPredicateEvaluator>> CreateTestEvaluator(
TestPredicateEvaluator** evaluator,
ContentPredicateEvaluator::Delegate* delegate) {
std::vector<std::unique_ptr<ContentPredicateEvaluator>> evaluators;
*evaluator = new TestPredicateEvaluator(delegate);
evaluators.push_back(std::unique_ptr<ContentPredicateEvaluator>(*evaluator));
return evaluators;
}
} // namespace
class DeclarativeChromeContentRulesRegistryTest : public testing::Test {
public:
DeclarativeChromeContentRulesRegistryTest() = default;
DeclarativeChromeContentRulesRegistryTest(
const DeclarativeChromeContentRulesRegistryTest&) = delete;
DeclarativeChromeContentRulesRegistryTest& operator=(
const DeclarativeChromeContentRulesRegistryTest&) = delete;
protected:
TestExtensionEnvironment* env() { return &env_; }
private:
TestExtensionEnvironment env_;
// Must come after |env_| so only one UI MessageLoop is created.
content::RenderViewHostTestEnabler rvh_enabler_;
};
TEST_F(DeclarativeChromeContentRulesRegistryTest, ActiveRulesDoesntGrow) {
TestPredicateEvaluator* evaluator = nullptr;
scoped_refptr<ChromeContentRulesRegistry> registry(
new ChromeContentRulesRegistry(
env()->profile(), nullptr,
base::BindOnce(&CreateTestEvaluator, &evaluator)));
EXPECT_EQ(0u, registry->GetActiveRulesCountForTesting());
std::unique_ptr<content::WebContents> tab = env()->MakeTab();
registry->MonitorWebContentsForRuleEvaluation(tab.get());
content::MockNavigationHandle navigation_handle;
navigation_handle.set_has_committed(true);
registry->DidFinishNavigation(tab.get(), &navigation_handle);
EXPECT_EQ(0u, registry->GetActiveRulesCountForTesting());
// Add a rule.
auto rule = api::events::Rule::FromValue(base::test::ParseJsonDict(R"({
"id": "rule1",
"priority": 100,
"conditions": [
{
"instanceType": "declarativeContent.PageStateMatcher",
"test_predicate": []
}],
"actions": [
{"instanceType": "declarativeContent.ShowAction"}
]
})"));
ASSERT_TRUE(rule.has_value());
std::vector<const api::events::Rule*> rules({&rule.value()});
const Extension* extension =
env()->MakeExtension(base::test::ParseJsonDict("{\"page_action\": {}}"));
registry->AddRulesImpl(extension->id(), rules);
registry->DidFinishNavigation(tab.get(), &navigation_handle);
EXPECT_EQ(0u, registry->GetActiveRulesCountForTesting());
evaluator->RequestImmediateEvaluation(tab.get(), true);
EXPECT_EQ(1u, registry->GetActiveRulesCountForTesting());
// Closing the tab should erase its entry from active_rules_. Invoke
// WebContentsDestroyed on the registry to mock it being notified that the tab
// has closed.
registry->WebContentsDestroyed(tab.get());
tab.reset();
EXPECT_EQ(0u, registry->GetActiveRulesCountForTesting());
tab = env()->MakeTab();
content::MockNavigationHandle navigation_handle2;
navigation_handle2.set_has_committed(true);
registry->MonitorWebContentsForRuleEvaluation(tab.get());
evaluator->RequestImmediateEvaluation(tab.get(), true);
EXPECT_EQ(1u, registry->GetActiveRulesCountForTesting());
evaluator->RequestEvaluationOnNextOperation(tab.get(), false);
registry->DidFinishNavigation(tab.get(), &navigation_handle2);
EXPECT_EQ(0u, registry->GetActiveRulesCountForTesting());
}
} // namespace extensions
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