Add a sample unit test target to flutter runner (flutter/engine#11847)

DEPS

@@ -152,7 +152,7 @@ deps = {
    Var('fuchsia_git') + '/third_party/benchmark' + '@' + 'a779ffce872b4c811beef482e18bd0b63626aa42',
 
   'src/third_party/googletest':
-   Var('fuchsia_git') + '/third_party/googletest' + '@' + '46d66506083fc3333d84c260e7bd2eb3816a917a',
+   Var('fuchsia_git') + '/third_party/googletest' + '@' + 'd8827ca8e397b725a3039b19cc116e309c47815e',
 
   'src/third_party/rapidjson':
    Var('fuchsia_git') + '/third_party/rapidjson' + '@' + '32d07c55db1bb6c2ae17cba4033491a667647753',

engine/src/flutter/ci/licenses_golden/licenses_flutter

@@ -942,6 +942,7 @@ FILE: ../../../flutter/shell/platform/fuchsia/flutter/runner.cc
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/runner.h
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/runner_context.cc
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/runner_context.h
+FILE: ../../../flutter/shell/platform/fuchsia/flutter/sample_unittests.cc
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/service_provider_dir.cc
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/service_provider_dir.h
 FILE: ../../../flutter/shell/platform/fuchsia/flutter/session_connection.cc

engine/src/flutter/shell/platform/fuchsia/flutter/BUILD.gn

@@ -336,3 +336,40 @@ jit_runner("flutter_jit_runner") {
 jit_runner("flutter_jit_product_runner") {
   product = true
 }
+
+executable("flutter_runner_unittests") {
+  testonly = true
+
+  output_name = "flutter_runner_tests"
+
+  sources = [
+    "sample_unittests.cc",
+  ]
+
+  # This is needed for //third_party/googletest for linking zircon
+  # symbols.
+  libs = [ "//fuchsia/sdk/$host_os/arch/$target_cpu/sysroot/lib/libzircon.so" ]
+
+  deps = [
+    "//flutter/testing",
+  ]
+}
+
+package_dir("flutter_runner_tests") {
+  testonly = true
+
+  deps = [
+    ":flutter_runner_unittests",
+  ]
+
+  binary = "$target_name"
+
+  meta_dir = "$flutter_root/shell/platform/fuchsia/flutter/meta"
+
+  meta = [
+    {
+      path = "meta/$target_name.cmx"
+      dest = "$target_name.cmx"
+    },
+  ]
+}

engine/src/flutter/shell/platform/fuchsia/flutter/sample_unittests.cc

@@ -0,0 +1,15 @@
+// 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 "gtest/gtest.h"
+
+namespace flutter {
+namespace testing {
+
+TEST(FlutterRunnerSampleTest, Sample) {
+  ASSERT_TRUE(true);
+}
+
+}  // namespace testing
+}  // namespace flutter