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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <array>
#include "base/test/metrics/histogram_tester.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/test_future.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/screen_ai/screen_ai_install_state.h"
#include "chrome/browser/screen_ai/screen_ai_service_router.h"
#include "chrome/browser/screen_ai/screen_ai_service_router_factory.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/test/base/in_process_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/metrics/content/subprocess_metrics_provider.h"
#include "content/public/test/browser_test.h"
#include "mojo/public/cpp/bindings/remote.h"
#include "net/dns/mock_host_resolver.h"
#include "services/metrics/public/cpp/ukm_source_id.h"
#include "services/screen_ai/buildflags/buildflags.h"
#include "services/screen_ai/public/cpp/utilities.h"
#include "services/screen_ai/public/mojom/screen_ai_service.mojom.h"
#include "ui/accessibility/accessibility_features.h"
#include "ui/accessibility/ax_features.mojom-features.h"
namespace {
#if !BUILDFLAG(USE_FAKE_SCREEN_AI)
const constexpr char* kTestPageRelativeURL =
"/main_content_extraction/sidebar_and_main_content.html";
// It is expected that the extracted main content from the above url would have
// the text below.
// Since the output is generated using a model that is sensitive to updates and
// rendering detailts, we cannot ensure the entire generated text is a fixed
// string, but at least this longer paragraph is expected to be in it.
const constexpr char* kExpectedText =
"Sometimes I think the surest sign that intelligent life exists elsewhere "
"in the universe is that none of it has tried to contact us.";
// Looks in to the given `ids` of the `tree_nodes` and returns true if either of
// them or their children have `kExpectedText`.
bool HasExpectedText(const std::vector<ui::AXNodeData>& tree_nodes,
std::vector<ui::AXNodeID> ids) {
std::map<ui::AXNodeID, uint32_t> id_to_index;
for (uint32_t i = 0; i < tree_nodes.size(); i++) {
id_to_index[tree_nodes[i].id] = i;
}
while (!ids.empty()) {
const ui::AXNodeData& node = tree_nodes[id_to_index[ids.back()]];
ids.pop_back();
if (node.HasStringAttribute(ax::mojom::StringAttribute::kName)) {
if (node.GetStringAttribute(ax::mojom::StringAttribute::kName) ==
kExpectedText) {
return true;
}
} else {
ids.insert(ids.end(), node.child_ids.begin(), node.child_ids.end());
}
}
return false;
}
#endif
} // namespace
namespace screen_ai {
class MainContentExtractionTest : public InProcessBrowserTest {
public:
MainContentExtractionTest() {
feature_list_.InitWithFeatures(
{features::kScreenAITestMode,
ax::mojom::features::kScreenAIMainContentExtractionEnabled},
{});
}
~MainContentExtractionTest() override = default;
// InProcessBrowserTest:
void SetUpOnMainThread() override {
InProcessBrowserTest::SetUpOnMainThread();
ScreenAIInstallState::GetInstance()->SetComponentFolder(
GetComponentBinaryPathForTests().DirName());
host_resolver()->AddRule("*", "127.0.0.1");
ASSERT_TRUE(embedded_test_server()->Start());
}
void Connect() {
base::test::TestFuture<bool> future;
ScreenAIServiceRouterFactory::GetForBrowserContext(browser()->profile())
->GetServiceStateAsync(
ScreenAIServiceRouter::Service::kMainContentExtraction,
future.GetCallback());
ASSERT_TRUE(future.Wait()) << "Service state callback not called.";
ASSERT_TRUE(future.Get<bool>()) << "Service initialization failed.";
ScreenAIServiceRouterFactory::GetForBrowserContext(browser()->profile())
->BindMainContentExtractor(
main_content_extractor_.BindNewPipeAndPassReceiver());
main_content_extractor_->SetClientType(
screen_ai::mojom::MceClientType::kTest);
}
ui::AXTreeUpdate DistillPage(const std::string& relative_url) {
GURL page = embedded_test_server()->GetURL(relative_url);
ui_test_utils::NavigateToURLBlockUntilNavigationsComplete(browser(), page,
1);
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
EXPECT_EQ(web_contents->GetURL(), page);
base::test::TestFuture<ui::AXTreeUpdate&> future;
web_contents->RequestAXTreeSnapshot(
future.GetCallback(), ui::kAXModeDefaultForTests,
/* max_nodes= */ 0,
/* timeout= */ {}, content::WebContents::AXTreeSnapshotPolicy::kAll);
EXPECT_TRUE(future.Wait());
return future.Get();
}
void ExtractMainContent(
const ui::AXTreeUpdate& ax_tree_update,
base::OnceCallback<void(const std::vector<int32_t>&)> callback) {
main_content_extractor_->ExtractMainContent(
ax_tree_update, std::move(callback));
}
void ExtractMainContent(const ui::AXTreeUpdate& ax_tree_update,
std::vector<ui::AXNodeID>& main_content_ids) {
base::test::TestFuture<const std::vector<ui::AXNodeID>&> future;
main_content_extractor_->ExtractMainContent(
ax_tree_update, future.GetCallback());
ASSERT_TRUE(future.Wait()) << "Main content was not received.";
main_content_ids = future.Get();
}
private:
mojo::Remote<screen_ai::mojom::Screen2xMainContentExtractor>
main_content_extractor_;
base::test::ScopedFeatureList feature_list_;
};
// Tests that calling main content extraction without content gets replied.
IN_PROC_BROWSER_TEST_F(MainContentExtractionTest, EmptyInput) {
base::HistogramTester histograms;
Connect();
ui::AXNodeData root;
root.id = 1;
root.role = ax::mojom::Role::kRootWebArea;
root.AddBoolAttribute(ax::mojom::BoolAttribute::kNonAtomicTextFieldRoot,
true);
root.relative_bounds.bounds = gfx::RectF(0, 0, 640, 480);
ui::AXTreeUpdate empty_tree;
empty_tree.root_id = root.id;
empty_tree.nodes = {root};
std::vector<ui::AXNodeID> main_content_ids;
ExtractMainContent(empty_tree, main_content_ids);
ASSERT_EQ(0u, main_content_ids.size());
metrics::SubprocessMetricsProvider::MergeHistogramDeltasForTesting();
histograms.ExpectTotalCount(
"Accessibility.ScreenAI.MainContentExtraction.Error.ResultNull", 1);
histograms.ExpectUniqueSample(
"Accessibility.ScreenAI.MainContentExtraction.Successful2", false, 1);
histograms.ExpectTotalCount(
"Accessibility.ScreenAI.MainContentExtraction.Latency.Success", 0);
histograms.ExpectTotalCount(
"Accessibility.ScreenAI.MainContentExtraction.Latency.Failure", 1);
}
// Fake library always returns empty.
#if !BUILDFLAG(USE_FAKE_SCREEN_AI)
// Tests main content extraction on a simple page with content.
IN_PROC_BROWSER_TEST_F(MainContentExtractionTest, RequestWithContent) {
base::HistogramTester histograms;
Connect();
ui::AXTreeUpdate tree_update = DistillPage(kTestPageRelativeURL);
ASSERT_FALSE(tree_update.nodes.empty());
std::vector<ui::AXNodeID> main_content_ids;
ExtractMainContent(tree_update, main_content_ids);
ASSERT_FALSE(main_content_ids.empty());
ASSERT_TRUE(HasExpectedText(tree_update.nodes, main_content_ids));
metrics::SubprocessMetricsProvider::MergeHistogramDeltasForTesting();
histograms.ExpectUniqueSample(
"Accessibility.ScreenAI.MainContentExtraction.Successful2", true, 1);
histograms.ExpectTotalCount(
"Accessibility.ScreenAI.MainContentExtraction.Latency.Success", 1);
histograms.ExpectTotalCount(
"Accessibility.ScreenAI.MainContentExtraction.Latency.Failure", 0);
}
// Test requesting several extractions without waiting for the previous ones to
// finish.
IN_PROC_BROWSER_TEST_F(MainContentExtractionTest, MultipleRequests) {
Connect();
ui::AXTreeUpdate tree_update = DistillPage(kTestPageRelativeURL);
ASSERT_FALSE(tree_update.nodes.empty());
constexpr uint32_t kRequestsCount = 3;
std::vector<ui::AXNodeID> main_content_ids[kRequestsCount];
std::array<base::test::TestFuture<const std::vector<ui::AXNodeID>&>,
kRequestsCount>
futures;
for (uint32_t i = 0; i < kRequestsCount; i++) {
ExtractMainContent(tree_update, futures[i].GetCallback());
}
for (uint32_t i = 0; i < kRequestsCount; i++) {
ASSERT_TRUE(futures[i].Wait())
<< "Main content was not received for request " << i;
ASSERT_TRUE(HasExpectedText(tree_update.nodes, futures[i].Get()))
<< "Unexpected result for request " << i;
}
}
#endif //! BUILDFLAG(USE_FAKE_SCREEN_AI)
} // namespace screen_ai
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