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// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef COMPONENTS_AUTOFILL_CONTENT_BROWSER_TEST_AUTOFILL_MANAGER_INJECTOR_H_
#define COMPONENTS_AUTOFILL_CONTENT_BROWSER_TEST_AUTOFILL_MANAGER_INJECTOR_H_
#include <vector>
#include "components/autofill/content/browser/content_autofill_client.h"
#include "components/autofill/content/browser/content_autofill_driver.h"
#include "components/autofill/content/browser/content_autofill_driver_factory.h"
#include "components/autofill/content/browser/content_autofill_driver_factory_test_api.h"
#include "components/autofill/content/browser/content_autofill_driver_test_api.h"
#include "components/autofill/content/browser/test_autofill_driver_injector.h"
#include "components/autofill/core/browser/foundations/autofill_manager_test_api.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/test/browser_test_utils.h"
namespace autofill {
// Asserts that at construction time, no other TestAutofillManagerInjector is
// alive.
class TestAutofillManagerInjectorBase {
public:
static bool some_instance_is_alive() { return num_instances_ > 0; }
TestAutofillManagerInjectorBase(const TestAutofillManagerInjectorBase&) =
delete;
TestAutofillManagerInjectorBase& operator=(
const TestAutofillManagerInjectorBase&) = delete;
protected:
TestAutofillManagerInjectorBase();
~TestAutofillManagerInjectorBase();
private:
static size_t num_instances_;
};
// RAII type that installs new AutofillManagers of type `T` in all newly
// navigated frames in all newly created WebContents.
//
// The injector only injects an AutofillManager if a driver is created.
// Especially in unit tests it may be necessary to do a navigation to create the
// driver, for example with
// NavigateAndCommit(GURL("about:blank"))
// or force-create the driver manually with
// client->GetAutofillDriverFactory().DriverForFrame(rfh).
//
// To prevent hard-to-find bugs, only one TestAutofillManagerInjector may be
// alive at a time. It must not be created before a TestAutofillClientInjector.
// These conditions are CHECKed.
//
// Usage:
//
// class AutofillFooTest : public ... {
// public:
// class MockAutofillManager : BrowserAutofillManager {
// public:
// explicit MockAutofillManager(ContentAutofillDriver* driver)
// : BrowserAutofillManager(driver) {}
// MOCK_METHOD(...);
// ...
// };
//
// MockAutofillManager* autofill_manager(content::RenderFrameHost* rfh) {
// return autofill_manager_injector_[rfh];
// }
//
// private:
// TestAutofillManagerInjector<MockAutofillManager>
// autofill_manager_injector_;
// };
template <typename T>
requires(std::derived_from<T, AutofillManager>)
class TestAutofillManagerInjector : public TestAutofillManagerInjectorBase {
public:
TestAutofillManagerInjector() = default;
TestAutofillManagerInjector(const TestAutofillManagerInjector&) = delete;
TestAutofillManagerInjector& operator=(const TestAutofillManagerInjector&) =
delete;
~TestAutofillManagerInjector() = default;
T* operator[](content::WebContents* web_contents) const {
return (*this)[web_contents->GetPrimaryMainFrame()];
}
T* operator[](content::RenderFrameHost* rfh) const {
auto it = managers_.find(rfh);
return it != managers_.end() ? it->second : nullptr;
}
private:
// Creates an AutofillManager using `T(ContentAutofillDriver*)` for every
// navigated frame in a given `WebContents`.
//
// One challenge is that the ContentAutofillClient may not exist yet at the
// time the Injector is created. (Because TabHelpers::AttachTabHelpers() is
// run later.)
//
// We therefore defer registering the ContentAutofillDriverFactory::Observer
// until the first RenderFrameCreated() event. This event comes late enough
// that ContentAutofillClient has been created but no ContentAutofillDriver
// has been created yet.
class Injector : public content::WebContentsObserver,
public ContentAutofillDriverFactory::Observer {
public:
Injector(TestAutofillManagerInjector* owner,
content::WebContents* web_contents)
: WebContentsObserver(web_contents), owner_(owner) {}
Injector(const Injector&) = delete;
Injector& operator=(const Injector&) = delete;
~Injector() override {
if (factory_) {
factory_->RemoveObserver(this);
}
}
void RenderFrameCreated(content::RenderFrameHost* rfh) override {
if (factory_) {
return;
}
auto* client = ContentAutofillClient::FromWebContents(web_contents());
if (!client) {
return;
}
factory_ = &client->GetAutofillDriverFactory();
// The injectors' observers should come first so that production-code
// observers affect the injected objects.
// The AutofillManager injector should come right after the
// ContentAutofillDriver injector, if one exists.
test_api(*factory_).AddObserverAtIndex(
this,
TestAutofillDriverInjectorBase::some_instance_is_alive() ? 1 : 0);
}
void OnContentAutofillDriverFactoryDestroyed(
ContentAutofillDriverFactory& factory) override {
if (factory_) {
factory_->RemoveObserver(this);
factory_ = nullptr;
}
}
// Replaces the just created `driver`'s manager with a new test manager.
void OnContentAutofillDriverCreated(
ContentAutofillDriverFactory& factory,
ContentAutofillDriver& driver) override {
auto new_manager = std::make_unique<T>(&driver);
owner_->managers_[driver.render_frame_host()] = new_manager.get();
test_api(driver).set_autofill_manager(std::move(new_manager));
}
void OnContentAutofillDriverStateChanged(
ContentAutofillDriverFactory& factory,
ContentAutofillDriver& driver,
AutofillDriver::LifecycleState old_state,
AutofillDriver::LifecycleState new_state) override {
switch (new_state) {
case AutofillDriver::LifecycleState::kInactive:
case AutofillDriver::LifecycleState::kActive:
case AutofillDriver::LifecycleState::kPendingReset:
break;
case AutofillDriver::LifecycleState::kPendingDeletion:
owner_->managers_.erase(driver.render_frame_host());
break;
}
}
private:
raw_ptr<TestAutofillManagerInjector> owner_;
// Observed source. We can't use a ScopedObservation because we use
// ContentAutofillDriverFactoryTestApi::AddObserverAtIndex() instead of
// ContentAutofillDriverFactory::AddObserver().
raw_ptr<ContentAutofillDriverFactory> factory_ = nullptr;
};
void ObserveWebContentsAndInjectManager(content::WebContents* web_contents) {
injectors_.push_back(std::make_unique<Injector>(this, web_contents));
}
std::vector<std::unique_ptr<Injector>> injectors_;
std::map<content::RenderFrameHost*, T*> managers_;
// Registers the lambda for the lifetime of `subscription_`.
base::CallbackListSubscription subscription_ =
content::RegisterWebContentsCreationCallback(base::BindRepeating(
&TestAutofillManagerInjector::ObserveWebContentsAndInjectManager,
base::Unretained(this)));
};
} // namespace autofill
#endif // COMPONENTS_AUTOFILL_CONTENT_BROWSER_TEST_AUTOFILL_MANAGER_INJECTOR_H_
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