HeadlessDevToolsClientImpl::DispatchEvent to post a task

headless/lib/headless_devtools_client_browsertest.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <memory>
 
 #include "base/json/json_reader.h"
 #include "content/public/test/browser_test.h"
 #include "headless/public/domains/browser.h"
 #include "headless/public/domains/network.h"
@@ skipping 476 matching lines @@
   std::string page_id_one_;
   std::string page_id_two_;
   bool page_one_loaded_ = false;
   bool page_two_loaded_ = false;
   int page_close_count_ = 0;
   int context_closed_count_ = 0;
 };
 
 HEADLESS_ASYNC_DEVTOOLED_TEST_F(BrowserDomainCreateTwoContexts);
 
+class HeadlessDevToolsNavigationControlTest
+    : public HeadlessAsyncDevTooledBrowserTest,
+      page::ExperimentalObserver {
+ public:
+  void RunDevTooledTest() override {
+    EXPECT_TRUE(embedded_test_server()->Start());
+    devtools_client_->GetPage()->GetExperimental()->AddObserver(this);
+    devtools_client_->GetPage()->Enable();
+    devtools_client_->GetPage()->GetExperimental()->SetControlNavigations(
+        headless::page::SetControlNavigationsParams::Builder()
+            .SetEnabled(true)
+            .Build());
+    devtools_client_->GetPage()->Navigate(
+        embedded_test_server()->GetURL("/hello.html").spec());
+  }
+
+  void OnNavigationRequested(
+      const headless::page::NavigationRequestedParams& params) override {
+    navigation_requested_ = true;
+    // Allow the navigation to proceed.
+    devtools_client_->GetPage()->GetExperimental()->ProcessNavigation(
+        headless::page::ProcessNavigationParams::Builder()
+            .SetNavigationId(params.GetNavigationId())
+            .SetResponse(headless::page::NavigationResponse::PROCEED)
+            .Build());
+  }
+
+  void OnFrameStoppedLoading(
+      const page::FrameStoppedLoadingParams& params) override {
+    EXPECT_TRUE(navigation_requested_);
+    FinishAsynchronousTest();
+  }
+
+ private:
+  bool navigation_requested_ = false;
+};
+
+HEADLESS_ASYNC_DEVTOOLED_TEST_F(HeadlessDevToolsNavigationControlTest);
+
 }  // namespace headless