add windows embedding test

.cirrus.yml

@@ -90,7 +90,7 @@ task:
 task:
   gce_instance:
     image_project: flutter-cirrus
-    image_name: flutter-engine-windows-server-2016-core
+    image_name: flutter-engine-windows-server-2016
     zone: us-central1-a
     platform: windows
     cpu: 32
@@ -109,11 +109,14 @@ task:
     cd %ENGINE_PATH%/src
     gclient sync
   matrix:
-    - name: build_windows_unopt_debug
+    - name: build_and_test_windows_unopt_debug
       compile_host_script: |
         cd %ENGINE_PATH%/src
         python flutter/tools/gn --runtime-mode debug --unoptimized
         ninja -C out/host_debug_unopt
+      test_host_script: |
+        cd %ENGINE_PATH%/src
+        python flutter/testing/run_tests.py --type=engine --engine-filter=flutter_windows_unittests,client_wrapper_windows_unittests
     - name: build_windows_opt_debug
       compile_host_script: |
         cd %ENGINE_PATH%/src

BUILD.gn

@@ -72,7 +72,10 @@ group("flutter") {
     ]
 
     if (is_win) {
-      public_deps += [ "$flutter_root/shell/platform/windows/client_wrapper:client_wrapper_windows_unittests" ]
+      public_deps += [
+        "$flutter_root/shell/platform/windows/client_wrapper:client_wrapper_windows_unittests",
+        "$flutter_root/shell/platform/windows:flutter_windows_unittests"
+      ]
     }
 
     if (!is_win) {

ci/docker/windows_build/prepare_windows_server_2016_core.ps1

@@ -1,5 +1,5 @@
 # The following powershell script prepares the VM image
-# flutter-engine-windows-server-2016-core used by Flutter engine's
+# flutter-engine-windows-server-2016 used by Flutter engine's
 # build_windows presubmit tests (see .cirrus.yml).
 #
 # The exact step of generating the VM image is:

ci/licenses_golden/licenses_flutter

@@ -1029,6 +1029,7 @@ FILE: ../../../flutter/shell/platform/windows/win32_flutter_window.cc
 FILE: ../../../flutter/shell/platform/windows/win32_flutter_window.h
 FILE: ../../../flutter/shell/platform/windows/win32_window.cc
 FILE: ../../../flutter/shell/platform/windows/win32_window.h
+FILE: ../../../flutter/shell/platform/windows/win32_window_unittests.cc
 FILE: ../../../flutter/shell/platform/windows/window_state.h
 FILE: ../../../flutter/shell/version/version.cc
 FILE: ../../../flutter/shell/version/version.h

shell/platform/common/cpp/client_wrapper/BUILD.gn

@@ -63,8 +63,9 @@ executable("client_wrapper_unittests") {
     ":client_wrapper_library_stubs",
     "$flutter_root/testing",
 
-    # TODO: Consider refactoring flutter_root/testing so that there's a testing
+    # TODO(chunhtai): Consider refactoring flutter_root/testing so that there's a testing
     # target that doesn't require a Dart runtime to be linked in.
+    # https://github.com/flutter/flutter/issues/41414.
     "//third_party/dart/runtime:libdart_jit",
   ]
 }

shell/platform/glfw/client_wrapper/BUILD.gn

@@ -84,8 +84,9 @@ executable("client_wrapper_glfw_unittests") {
     "$flutter_root/shell/platform/common/cpp/client_wrapper:client_wrapper_library_stubs",
     "$flutter_root/testing",
 
-    # TODO: Consider refactoring flutter_root/testing so that there's a testing
+    # TODO(chunhtai): Consider refactoring flutter_root/testing so that there's a testing
     # target that doesn't require a Dart runtime to be linked in.
+    # https://github.com/flutter/flutter/issues/41414.
     "//third_party/dart/runtime:libdart_jit",
   ]
 }

shell/platform/windows/BUILD.gn

@@ -5,6 +5,7 @@
 assert(is_win)
 
 import("$flutter_root/shell/platform/glfw/config.gni")
+import("$flutter_root/testing/testing.gni")
 
 _public_headers = [ "public/flutter_windows.h" ]
 
@@ -100,6 +101,34 @@ shared_library("flutter_windows") {
   public_configs = [ "$flutter_root:config" ]
 }
 
+test_fixtures("flutter_windows_fixtures") {
+  fixtures = []
+}
+
+executable("flutter_windows_unittests") {
+  testonly = true
+
+  sources = [
+    "win32_window_unittests.cc",
+    "testing/win32_flutter_window_test.h",
+    "testing/win32_flutter_window_test.cc",
+  ]
+
+  public_configs = [ "$flutter_root:config" ]
+
+  deps = [
+    ":flutter_windows_source",
+    ":flutter_windows_headers",
+    "//third_party/rapidjson",
+    ":flutter_windows_fixtures",
+    "$flutter_root/testing",
+    # TODO(chunhtai): Consider refactoring flutter_root/testing so that there's a testing
+    # target that doesn't require a Dart runtime to be linked in.
+    # https://github.com/flutter/flutter/issues/41414.
+    "//third_party/dart/runtime:libdart_jit",
+  ]
+}
+
 shared_library("flutter_windows_glfw") {
   deps = [
     "$flutter_root/shell/platform/glfw:flutter_glfw",

shell/platform/windows/client_wrapper/BUILD.gn

@@ -78,8 +78,9 @@ executable("client_wrapper_windows_unittests") {
     "$flutter_root/shell/platform/common/cpp/client_wrapper:client_wrapper_library_stubs",
     "$flutter_root/testing",
 
-    # TODO: Consider refactoring flutter_root/testing so that there's a testing
+    # TODO(chunhtai): Consider refactoring flutter_root/testing so that there's a testing
     # target that doesn't require a Dart runtime to be linked in.
+    # https://github.com/flutter/flutter/issues/41414.
     "//third_party/dart/runtime:libdart_jit",
   ]
 }

shell/platform/windows/testing/win32_flutter_window_test.cc

@@ -0,0 +1,20 @@
+#include "flutter/shell/platform/windows/testing/win32_flutter_window_test.h"
+#include <iostream>
+
+namespace flutter {
+namespace testing {
+
+Win32FlutterWindowTest::Win32FlutterWindowTest(int width, int height)
+    : Win32FlutterWindow(width, height){};
+
+Win32FlutterWindowTest::~Win32FlutterWindowTest() = default;
+
+void Win32FlutterWindowTest::OnFontChange() {
+  on_font_change_called_ = true;
+}
+
+bool Win32FlutterWindowTest::OnFontChangeWasCalled() {
+  return on_font_change_called_;
+}
+}  // namespace testing
+}  // namespace flutter

shell/platform/windows/testing/win32_flutter_window_test.h

@@ -0,0 +1,31 @@
+// Copyright 2013 The Flutter 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 <windowsx.h>
+
+#include "flutter/fml/macros.h"
+#include "flutter/shell/platform/windows/win32_flutter_window.h"
+
+namespace flutter {
+namespace testing {
+
+class Win32FlutterWindowTest : public Win32FlutterWindow {
+ public:
+  Win32FlutterWindowTest(int width, int height);
+
+  ~Win32FlutterWindowTest();
+
+  // |Win32Window|
+  void OnFontChange() override;
+
+  bool OnFontChangeWasCalled();
+
+ private:
+  bool on_font_change_called_ = false;
+
+  FML_DISALLOW_COPY_AND_ASSIGN(Win32FlutterWindowTest);
+};
+
+}  // namespace testing
+}  // namespace flutter

shell/platform/windows/win32_window_unittests.cc

@@ -0,0 +1,22 @@
+#include "flutter/shell/platform/windows/testing/win32_flutter_window_test.h"
+#include "gtest/gtest.h"
+
+namespace flutter {
+namespace testing {
+
+TEST(Win32FlutterWindowTest, CreateDestroy) {
+  Win32FlutterWindowTest window(800, 600);
+  ASSERT_TRUE(TRUE);
+}
+
+TEST(Win32FlutterWindowTest, CanFontChange) {
+  Win32FlutterWindowTest window(800, 600);
+  HWND hwnd = window.GetWindowHandle();
+  LRESULT result = SendMessage(hwnd, WM_FONTCHANGE, NULL, NULL);
+  ASSERT_EQ(result, 0);
+  ASSERT_TRUE(window.OnFontChangeWasCalled());
+  ASSERT_TRUE(TRUE);
+}
+
+}  // namespace testing
+}  // namespace flutter

testing/run_tests.py

@@ -83,6 +83,10 @@ def RunCCTests(build_dir, filter):
   # https://github.com/flutter/flutter/issues/36294
   if not IsWindows():
     RunEngineExecutable(build_dir, 'embedder_unittests', filter, shuffle_flags)
+  else:
+    RunEngineExecutable(build_dir, 'flutter_windows_unittests', filter, shuffle_flags)
+
+    RunEngineExecutable(build_dir, 'client_wrapper_windows_unittests', filter, shuffle_flags)
 
   flow_flags = ['--gtest_filter=-PerformanceOverlayLayer.Gold']
   if IsLinux():