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// Copyright 2025 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 "chrome/browser/ui/browser.h"
#include "chrome/common/pref_names.h"
#include "chrome/test/base/chrome_test_utils.h"
#include "chrome/test/base/platform_browser_test.h"
#include "chrome/test/base/ui_test_utils.h"
#include "components/policy/core/browser/browser_policy_connector.h"
#include "components/policy/core/common/mock_configuration_policy_provider.h"
#include "components/policy/policy_constants.h"
#include "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "ui/gl/gl_switches.h"
namespace {
//
// Checks if WebGL is enabled in the given WebContents.
bool IsWebGLEnabled(content::WebContents* contents) {
return content::EvalJs(contents,
"var canvas = document.createElement('canvas');"
"var context = canvas.getContext('webgl');"
"context != null;")
.ExtractBool();
}
class SwiftShaderEnabledBrowserTest : public PlatformBrowserTest {
public:
SwiftShaderEnabledBrowserTest(const SwiftShaderEnabledBrowserTest&) = delete;
SwiftShaderEnabledBrowserTest& operator=(
const SwiftShaderEnabledBrowserTest&) = delete;
protected:
SwiftShaderEnabledBrowserTest() = default;
void SetUpInProcessBrowserTestFixture() override {
// We setup the policy here, because the policy must be 'live' before
// any GPU initialization since the value for this policy is passed to the
// GPU process via a command-line.Setting the policy in the test itself or
// in SetUpOnMainThread works for update-able policies, but is too late for
// this one.
provider_.SetDefaultReturns(
true /* is_initialization_complete_return */,
true /* is_first_policy_load_complete_return */);
policy::BrowserPolicyConnector::SetPolicyProviderForTesting(&provider_);
policy::PolicyMap values;
values.Set(policy::key::kEnableUnsafeSwiftShader,
policy::POLICY_LEVEL_MANDATORY, policy::POLICY_SCOPE_USER,
policy::POLICY_SOURCE_CLOUD, base::Value(true), nullptr);
provider_.UpdateChromePolicy(values);
}
testing::NiceMock<policy::MockConfigurationPolicyProvider> provider_;
};
IN_PROC_BROWSER_TEST_F(SwiftShaderEnabledBrowserTest, EnableUnsafeSwiftShader) {
// Verify that WebGL is always available when EnableUnsafeSwiftShader is set,
// regardless of GPU hardware acceleration availability.
ASSERT_TRUE(
ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL)));
content::WebContents* contents =
browser()->tab_strip_model()->GetActiveWebContents();
EXPECT_TRUE(IsWebGLEnabled(contents));
const base::CommandLine* command_line =
base::CommandLine::ForCurrentProcess();
EXPECT_TRUE(command_line->HasSwitch(switches::kEnableUnsafeSwiftShader));
}
} // namespace
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