[fuchsia] Provide helper for working with web.Frames in tests.

Bug: 1200314
Change-Id: Ia4dc830d33aa70c7868fafb6b30121aa6f39196b
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2879992
Auto-Submit: Wez <wez@chromium.org>
Commit-Queue: Wez <wez@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: David Dorwin <ddorwin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#880633}

fuchsia/engine/BUILD.gn

@@ -373,6 +373,8 @@ fuchsia_package_runner("web_engine_with_webui_installer") {
 source_set("browsertest_core") {
   testonly = true
   sources = [
+    "test/frame_test_helper.cc",
+    "test/frame_test_helper.h",
     "test/test_data.cc",
     "test/test_data.h",
     "test/web_engine_browser_test.cc",
@@ -385,6 +387,7 @@ source_set("browsertest_core") {
     ":web_engine_core",
     "//content/public/browser",
     "//content/test:test_support",
+    "//fuchsia/base:test_support",
     "//net:test_support",
     "//testing/gtest",
     "//third_party/fuchsia-sdk/sdk/fidl/fuchsia.web",

fuchsia/engine/test/frame_test_helper.cc

@@ -0,0 +1,34 @@
+// Copyright 2021 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 "fuchsia/engine/test/frame_test_helper.h"
+
+namespace cr_fuchsia {
+
+FrameTestHelper::FrameTestHelper(fuchsia::web::Context* context,
+                                 fuchsia::web::CreateFrameParams params)
+    : navigation_listener_binding_(&navigation_listener_) {
+  context->CreateFrameWithParams(std::move(params), frame_.NewRequest());
+  frame_->SetNavigationEventListener(navigation_listener_binding_.NewBinding());
+}
+
+FrameTestHelper::FrameTestHelper(fuchsia::web::FrameHost* frame_host,
+                                 fuchsia::web::CreateFrameParams params)
+    : navigation_listener_binding_(&navigation_listener_) {
+  frame_host->CreateFrameWithParams(std::move(params), frame_.NewRequest());
+  frame_->SetNavigationEventListener(navigation_listener_binding_.NewBinding());
+}
+
+FrameTestHelper::FrameTestHelper(const fuchsia::web::ContextPtr& context,
+                                 fuchsia::web::CreateFrameParams params)
+    : FrameTestHelper(context.get(), std::move(params)) {}
+
+fuchsia::web::NavigationControllerPtr
+FrameTestHelper::GetNavigationController() {
+  fuchsia::web::NavigationControllerPtr controller;
+  frame_->GetNavigationController(controller.NewRequest());
+  return controller;
+}
+
+}  // namespace cr_fuchsia

fuchsia/engine/test/frame_test_helper.h

@@ -0,0 +1,47 @@
+// Copyright 2021 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.
+
+#ifndef FUCHSIA_ENGINE_TEST_FRAME_TEST_HELPER_H_
+#define FUCHSIA_ENGINE_TEST_FRAME_TEST_HELPER_H_
+
+#include <fuchsia/web/cpp/fidl.h>
+#include <lib/fidl/cpp/binding.h>
+#include <memory>
+
+#include "fuchsia/base/test_navigation_listener.h"
+
+namespace cr_fuchsia {
+
+// Helper for tests which need to create fuchsia.web.Frames.
+class FrameTestHelper {
+ public:
+  FrameTestHelper(fuchsia::web::Context* context,
+                  fuchsia::web::CreateFrameParams params);
+  FrameTestHelper(fuchsia::web::FrameHost* frame_host,
+                  fuchsia::web::CreateFrameParams params);
+  FrameTestHelper(const fuchsia::web::ContextPtr& context,
+                  fuchsia::web::CreateFrameParams params);
+  ~FrameTestHelper();
+
+  FrameTestHelper(const FrameTestHelper&) = delete;
+  FrameTestHelper& operator=(const FrameTestHelper&) = delete;
+
+  // Returns a new NavigationController for each call, which ensures that any
+  // calls made to |frame()| will have been processed before navigation
+  // controller requests.
+  fuchsia::web::NavigationControllerPtr GetNavigationController();
+
+  fuchsia::web::FramePtr& frame() { return frame_; }
+  TestNavigationListener& navigation_listener() { return navigation_listener_; }
+
+ private:
+  fuchsia::web::FramePtr frame_;
+  TestNavigationListener navigation_listener_;
+  fidl::Binding<fuchsia::web::NavigationEventListener>
+      navigation_listener_binding_;
+};
+
+}  // namespace cr_fuchsia
+
+#endif  // FUCHSIA_ENGINE_TEST_FRAME_TEST_HELPER_H_