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// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/command_line.h"
#include "base/test/scoped_feature_list.h"
#include "base/test/test_future.h"
#include "components/surface_embed/common/features.h"
#include "components/viz/common/frame_sinks/copy_output_result.h"
#include "content/public/browser/render_widget_host_view.h"
#include "content/public/browser/web_contents.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/content_browser_test.h"
#include "content/public/test/content_browser_test_utils.h"
#include "content/shell/browser/shell.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/geometry/rect.h"
namespace surface_embed {
namespace {
constexpr char kSimplePageWithEmbedTagTestUrl[] =
"/surface_embed/embed_tag.html";
constexpr size_t kSingleEmbedCount = 1;
constexpr float kTestDeviceScaleFactor = 1.5f;
} // namespace
class SurfaceEmbedBrowserTest : public content::ContentBrowserTest {
public:
void SetUp() override {
scoped_feature_list_.InitAndEnableFeature(features::kSurfaceEmbed);
content::ContentBrowserTest::SetUp();
}
void SetUpCommandLine(base::CommandLine* command_line) override {
content::ContentBrowserTest::SetUpCommandLine(command_line);
// Enable pixel output in tests to allow CopyFromSurface to capture actual
// rendered content instead of returning empty/black bitmaps.
// Note that we force a device scale factor of 1.5 to also test scaling of
// the surface embed plugin.
EnablePixelOutput(kTestDeviceScaleFactor);
}
void SetUpOnMainThread() override {
content::ContentBrowserTest::SetUpOnMainThread();
embedded_test_server()->ServeFilesFromSourceDirectory(
"components/test/data");
ASSERT_TRUE(embedded_test_server()->Start());
}
content::WebContents* web_contents() { return shell()->web_contents(); }
void NavigateToTestUrl(const char* url) {
const GURL test_url = embedded_test_server()->GetURL(url);
ASSERT_TRUE(content::NavigateToURL(web_contents(), test_url));
}
int CountEmbedElementsInPage() {
return content::EvalJs(web_contents(), "document.embeds.length")
.ExtractInt();
}
protected:
// Take a screenshot of the given rectangle area of the main web contents.
// Empty rectangle captures the full area.
SkBitmap TakeScreenshot(const gfx::Rect& capture_rect) {
base::test::TestFuture<const content::CopyFromSurfaceResult&> future_bitmap;
web_contents()->GetRenderWidgetHostView()->CopyFromSurface(
capture_rect, gfx::Size(), base::TimeDelta(),
future_bitmap.GetCallback());
return future_bitmap.Take()
.value_or(viz::CopyOutputBitmapWithMetadata())
.bitmap;
}
// Check if the given color is rendered.
bool CheckHasPixelInColor(SkColor target_color) {
content::WaitForCopyableViewInWebContents(web_contents());
auto bitmap = TakeScreenshot(gfx::Rect());
for (int x = 0; x < bitmap.width(); ++x) {
for (int y = 0; y < bitmap.height(); ++y) {
if (bitmap.getColor(x, y) == target_color) {
return true;
}
}
}
return false;
}
private:
base::test::ScopedFeatureList scoped_feature_list_;
};
IN_PROC_BROWSER_TEST_F(SurfaceEmbedBrowserTest, EmbedTagCreatesPlugin) {
NavigateToTestUrl(kSimplePageWithEmbedTagTestUrl);
EXPECT_EQ(kSingleEmbedCount, CountEmbedElementsInPage());
// Expect the stub plugin code to render a red square.
EXPECT_TRUE(CheckHasPixelInColor(SK_ColorRED));
}
} // namespace surface_embed
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