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// Copyright 2020 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/test/metrics/histogram_tester.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 "content/public/test/browser_test.h"
#include "content/public/test/browser_test_utils.h"
#include "content/public/test/test_navigation_observer.h"
#include "net/test/embedded_test_server/embedded_test_server.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/blink/public/mojom/use_counter/metrics/web_feature.mojom.h"
namespace content {
// The Trust Token API (https://github.com/wicg/trust-token-api) allows clients
// to annotate outgoing requests with certain cryptographic state, by providing
// parameters alongside Fetch, XHR, and iframe-tag loads. These tests confirm
// that providing Trust Tokens parameters to each of these API entry points
// increments the corresponding Blink UseCounter. Although Trust Tokens is part
// of the web platform and the use counters are incremented in Blink, these
// tests live in //chrome because the Page Load Metrics framework, Chrome's way
// of listening for use counter updates, is not available in the content shell.
class TrustTokenUseCountersBrowsertest : public InProcessBrowserTest {
public:
TrustTokenUseCountersBrowsertest() = default;
void SetUpOnMainThread() override {
server_.AddDefaultHandlers(
base::FilePath(FILE_PATH_LITERAL("chrome/test/data")));
ASSERT_TRUE(server_.Start());
}
protected:
net::EmbeddedTestServer server_{net::EmbeddedTestServer::TYPE_HTTPS};
};
IN_PROC_BROWSER_TEST_F(TrustTokenUseCountersBrowsertest, CountsFetchUse) {
base::HistogramTester histograms;
GURL start_url(server_.GetURL("/title1.html"));
EXPECT_TRUE(ui_test_utils::NavigateToURL(browser(), start_url));
std::string cmd = R"(
(async () => {
await fetch("/page404.html", {privateToken: {version: 1,
operation: 'token-request'}});
} )(); )";
// We use EvalJs here, not ExecJs, because EvalJs waits for promises to
// resolve. We expect a failure because the destination of the Trust
// Tokens operation-bearing request will 404; this is fine since we just need
// to test that the usage metric fired when the command was called.
EXPECT_FALSE(
content::EvalJs(browser()->tab_strip_model()->GetActiveWebContents(), cmd)
.error.empty());
// Navigate away in order to flush use counters.
EXPECT_TRUE(
ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL)));
histograms.ExpectBucketCount("Blink.UseCounter.Features",
blink::mojom::WebFeature::kTrustTokenFetch, 1);
}
IN_PROC_BROWSER_TEST_F(TrustTokenUseCountersBrowsertest, CountsXhrUse) {
GURL start_url(server_.GetURL("/title1.html"));
EXPECT_TRUE(ui_test_utils::NavigateToURL(browser(), start_url));
base::HistogramTester histograms;
// Execute a Trust Tokens issuance against a nonexistent endpoint.
std::string cmd = R"(
(async () => {
let request = new XMLHttpRequest();
request.open('GET', '/page404.html');
request.setPrivateToken({
version: 1,
operation: 'token-request'
});
let promise = new Promise((res, rej) => {
request.onload = res; request.onerror = rej;
});
request.send();
await promise;
})(); )";
// We use EvalJs here, not ExecJs, because EvalJs waits for promises to
// resolve. We expect a failure because the destination of the Trust
// Tokens operation-bearing request will 404; this is fine since we just need
// to test that the usage metric fired when the command was called.
EXPECT_FALSE(
content::EvalJs(browser()->tab_strip_model()->GetActiveWebContents(), cmd)
.error.empty());
// Navigate away in order to flush use counters.
EXPECT_TRUE(
ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL)));
histograms.ExpectBucketCount("Blink.UseCounter.Features",
blink::mojom::WebFeature::kTrustTokenXhr, 1);
}
IN_PROC_BROWSER_TEST_F(TrustTokenUseCountersBrowsertest, CountsIframeUse) {
base::HistogramTester histograms;
GURL start_url(server_.GetURL("/iframe.html"));
EXPECT_TRUE(ui_test_utils::NavigateToURL(browser(), start_url));
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
// It's important to set the trust token arguments before updating src, as
// the latter triggers a load. It's also important to JsReplace the trustToken
// argument here, because iframe.privateToken expects a (properly escaped)
// JSON-encoded string as its value, not a JS object.
EXPECT_TRUE(ExecJs(web_contents,
JsReplace(
R"( const myFrame = document.getElementById("test");
myFrame.privateToken = $1;
myFrame.src = $2;)",
R"({"version": 1,
"operation": "send-redemption-record"})",
"/page404.html")));
TestNavigationObserver load_observer(web_contents);
load_observer.Wait();
// Navigate away in order to flush use counters.
EXPECT_TRUE(
ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL)));
histograms.ExpectBucketCount("Blink.UseCounter.Features",
blink::mojom::WebFeature::kTrustTokenIframe, 1);
}
IN_PROC_BROWSER_TEST_F(TrustTokenUseCountersBrowsertest, CountsIframeUseViaSetattribute) {
base::HistogramTester histograms;
GURL start_url(server_.GetURL("/iframe.html"));
EXPECT_TRUE(ui_test_utils::NavigateToURL(browser(), start_url));
content::WebContents* web_contents =
browser()->tab_strip_model()->GetActiveWebContents();
// It's important to set the trust token arguments before updating src, as
// the latter triggers a load. It's also important to JsReplace the trustToken
// argument here, because iframe.trustToken expects a (properly escaped)
// JSON-encoded string as its value, not a JS object.
EXPECT_TRUE(ExecJs(web_contents,
JsReplace(
R"( const myFrame = document.getElementById("test");
myFrame.setAttribute('privateToken', $1);
myFrame.src = $2;)",
R"({"version": 1,
"operation": "send-redemption-record"})",
"/page404.html")));
TestNavigationObserver load_observer(web_contents);
load_observer.Wait();
// Navigate away in order to flush use counters.
EXPECT_TRUE(
ui_test_utils::NavigateToURL(browser(), GURL(url::kAboutBlankURL)));
histograms.ExpectBucketCount("Blink.UseCounter.Features",
blink::mojom::WebFeature::kTrustTokenIframe, 1);
}
} // namespace content
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