Add Dart JIT runner integration test

DEPS

@@ -109,7 +109,7 @@ allowed_hosts = [
 ]
 
 deps = {
-  'src': 'https://github.com/flutter/buildroot.git' + '@' + 'c9c2b77c9520903741ccda2fe12f773408a76c94',
+  'src': 'https://github.com/flutter/buildroot.git' + '@' + 'b7ef254d8cec53bdad39cdb4a284af1d0a79dbdb',
 
    # Fuchsia compatibility
    #

shell/platform/fuchsia/dart_runner/BUILD.gn

@@ -333,6 +333,9 @@ if (enable_unittests) {
   group("tests") {
     testonly = true
 
-    deps = [ ":dart_runner_tests" ]
+    deps = [
+      ":dart_runner_tests",
+      "tests/startup_integration_test",
+    ]
   }
 }

shell/platform/fuchsia/dart_runner/tests/README.md

@@ -0,0 +1,40 @@
+# Dart Runner Tests
+
+Contains tests for the Dart Runner and their corresponding utility code
+
+### Running the Tests
+<!-- TODO(erkln): Replace steps once test runner script is updated to run Dart runner tests -->
+- The tests can be run using the Fuchsia emulator
+```
+fx set workstation_eng.qemu-x64
+ffx emu start --headless
+```
+- Start up the package server
+```
+fx serve
+```
+- Prepare the BUILD files
+```
+$ENGINE_DIR/flutter/tools/gn --fuchsia --no-lto
+```
+- Build the Fuchsia binary with the test directory as the target (ie. `flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test`)
+```
+ninja -C $ENGINE_DIR/out/fuchsia_debug_x64 flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test
+```
+- Deploy/publish test FAR files to Fuchsia
+```
+$FUCHSIA_DIR/.jiri_root/bin/fx pm publish -a -repo $FUCHSIA_DIR/$(cat $FUCHSIA_DIR/.fx-build-dir)/amber-files -f $ENGINE_DIR/out/fuchsia_debug_x64/dart-jit-runner-integration-test-0.far
+```
+
+Note that some tests may have components that also need to be deployed/published (ie. `dart_jit_echo_server` also needs to be published for the Dart JIT integration test to run successfully)
+
+```
+$FUCHSIA_DIR/.jiri_root/bin/fx pm publish -a -repo $FUCHSIA_DIR/$(cat $FUCHSIA_DIR/.fx-build-dir)/amber-files -f $ENGINE_DIR/out/fuchsia_debug_x64/gen/flutter/shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/dart_jit_echo_server/dart_jit_echo_server/dart_jit_echo_server.far
+```
+- Run the test
+```
+ffx test run "fuchsia-pkg://fuchsia.com/dart-jit-runner-integration-test#meta/dart-jit-runner-integration-test.cm"
+```
+
+Notes:
+- To find the FAR files, `ls` into the output directory provided to the `ninja` command

shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/BUILD.gn

@@ -0,0 +1,12 @@
+# 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.
+
+import("//build/fuchsia/sdk.gni")
+import("//flutter/tools/fuchsia/fidl/fidl.gni")
+
+fidl("echo") {
+  name = "flutter.example.echo"
+  meta = "//flutter/shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/meta.json"
+  sources = [ "echo.fidl" ]
+}

shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/README.md

@@ -0,0 +1,3 @@
+# Echo FIDL
+
+This FIDL protocol allows the Dart integration tests to communicate with a Dart Echo server (a test Dart component that echoes back a request).

shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/echo.fidl

@@ -0,0 +1,17 @@
+// Copyright 2019 The Fuchsia Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+library flutter.example.echo;
+
+const MAX_STRING_LENGTH uint64 = 32;
+
+@discoverable
+protocol Echo {
+    /// Returns the input.
+    EchoString(struct {
+        value string:<MAX_STRING_LENGTH, optional>;
+    }) -> (struct {
+        response string:<MAX_STRING_LENGTH, optional>;
+    });
+};

shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/meta.json

@@ -0,0 +1,9 @@
+{
+    "deps": [],
+    "name": "flutter.example.echo",
+    "root": "fidl/flutter.example.echo",
+    "sources": [
+        "../../../flutter/shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/echo.fidl"
+    ],
+    "type": "fidl_library"
+}

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/BUILD.gn

@@ -2,7 +2,9 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-group("tests") {
+import("//build/fuchsia/sdk.gni")
+
+group("startup_integration_test") {
   testonly = true
-  deps = [ "hello_world:hello_world_dart" ]
+  deps = [ "dart_jit_runner:tests" ]
 }

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/BUILD.gn

@@ -0,0 +1,50 @@
+# 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.
+
+import("//build/fuchsia/sdk.gni")
+
+import("//flutter/tools/fuchsia/dart/dart_component.gni")
+import("//flutter/tools/fuchsia/fidl/fidl.gni")
+import("//flutter/tools/fuchsia/fuchsia_archive.gni")
+
+group("tests") {
+  testonly = true
+  deps = [ ":dart-jit-runner-integration-test" ]
+}
+
+executable("dart-jit-runner-integration-test-bin") {
+  testonly = true
+
+  output_name = "dart-jit-runner-integration-test"
+
+  sources = [ "dart-jit-runner-integration-test.cc" ]
+
+  # This is needed for //third_party/googletest for linking zircon symbols.
+  libs = [ "$fuchsia_sdk_path/arch/$target_cpu/sysroot/lib/libzircon.so" ]
+
+  deps = [
+    "$fuchsia_sdk_root/fidl:fuchsia.logger",
+    "$fuchsia_sdk_root/fidl:fuchsia.tracing.provider",
+    "$fuchsia_sdk_root/pkg:async",
+    "$fuchsia_sdk_root/pkg:async-loop-testing",
+    "$fuchsia_sdk_root/pkg:fidl_cpp",
+    "$fuchsia_sdk_root/pkg:sys_component_cpp_testing",
+    "$fuchsia_sdk_root/pkg:zx",
+    "dart_jit_echo_server:package",
+    "//flutter/fml",
+    "//flutter/shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo:echo",
+    "//third_party/googletest:gtest",
+    "//third_party/googletest:gtest_main",
+  ]
+}
+
+fuchsia_test_archive("dart-jit-runner-integration-test") {
+  deps = [
+    ":dart-jit-runner-integration-test-bin",
+    "dart_jit_echo_server:package",
+  ]
+
+  binary = "$target_name"
+  cml_file = rebase_path("meta/$target_name.cml")
+}

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/README.md

@@ -0,0 +1,3 @@
+# dart_jit_runner
+
+Contains the integration test for the Dart JIT runner. The Dart Echo server is launched with a JIT runner.

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/dart-jit-runner-integration-test.cc

@@ -0,0 +1,59 @@
+// 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.
+
+// The generated C++ bindings for the Echo FIDL protocol
+#include <flutter/shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo/flutter/example/echo/cpp/fidl.h>
+
+#include <lib/async-loop/testing/cpp/real_loop.h>
+#include <lib/sys/component/cpp/testing/realm_builder.h>
+#include <lib/sys/component/cpp/testing/realm_builder_types.h>
+
+#include "flutter/fml/logging.h"
+#include "gtest/gtest.h"
+
+namespace dart_jit_runner_testing::testing {
+namespace {
+
+using component_testing::ChildRef;
+using component_testing::ParentRef;
+using component_testing::Protocol;
+using component_testing::RealmBuilder;
+using component_testing::RealmRoot;
+using component_testing::Route;
+
+class RealmBuilderTest : public ::loop_fixture::RealLoop,
+                         public ::testing::Test {
+ public:
+  RealmBuilderTest() = default;
+};
+
+TEST_F(RealmBuilderTest, DartRunnerStartsUp) {
+  auto realm_builder = RealmBuilder::Create();
+  // Add Dart server component as a child of Realm Builder
+  realm_builder.AddChild("hello_world",
+                         "fuchsia-pkg://fuchsia.com/dart_jit_echo_server#meta/"
+                         "dart_jit_echo_server.cm");
+  realm_builder.AddRoute(
+      Route{.capabilities = {Protocol{"fuchsia.logger.LogSink"}},
+            .source = ParentRef(),
+            .targets = {ChildRef{"hello_world"}}});
+  // Route the Echo FIDL protocol, this allows the Dart echo server to
+  // communicate with the Realm Builder
+  realm_builder.AddRoute(
+      Route{.capabilities = {Protocol{"flutter.example.echo.Echo"}},
+            .source = ChildRef{"hello_world"},
+            .targets = {ParentRef()}});
+  // Build the Realm with the provided child and protocols
+  auto realm = realm_builder.Build(dispatcher());
+  FML_LOG(INFO) << "Realm built: " << realm.GetChildName();
+  // Connect to the Dart echo server
+  auto echo = realm.ConnectSync<flutter::example::echo::Echo>();
+  fidl::StringPtr response;
+  // Attempt to ping the Dart echo server for a response
+  echo->EchoString("hello", &response);
+  ASSERT_EQ(response, "hello");
+}
+
+}  // namespace
+}  // namespace dart_jit_runner_testing::testing

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/dart_jit_echo_server/BUILD.gn

@@ -0,0 +1,45 @@
+# 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.
+
+import("//build/fuchsia/sdk.gni")
+
+import("//flutter/tools/fuchsia/dart/dart_component.gni")
+import("//flutter/tools/fuchsia/dart/dart_library.gni")
+import("//flutter/tools/fuchsia/gn-sdk/package.gni")
+
+dart_library("lib") {
+  testonly = true
+  package_name = "dart_jit_echo_server"
+  null_safe = true
+
+  source_dir = "."
+  sources = [ "main.dart" ]
+
+  deps = [
+    "//flutter/shell/platform/fuchsia/dart_runner/tests/fidl/flutter.example.echo:echo",
+    "//flutter/tools/fuchsia/dart:fidl",
+    "//flutter/tools/fuchsia/dart:fuchsia_services",
+    "//flutter/tools/fuchsia/fidl:fuchsia.logger",
+    "//flutter/tools/fuchsia/fidl:fuchsia.test",
+  ]
+}
+
+# Dart component that serves the test Echo FIDL protocol, built using the Dart JIT runner
+dart_component("component") {
+  testonly = true
+  null_safe = true
+
+  manifest = "meta/dart-jit-echo-server.cml"
+  main_package = "dart_jit_echo_server"
+  component_name = "dart_jit_echo_server"
+
+  deps = [ ":lib" ]
+}
+
+fuchsia_package("package") {
+  testonly = true
+
+  package_name = "dart_jit_echo_server"
+  deps = [ ":component" ]
+}

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/dart_jit_echo_server/main.dart

@@ -0,0 +1,48 @@
+// 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.
+
+// The server uses async code to be able to listen for incoming Echo requests and connections
+// asynchronously.
+import 'dart:async';
+
+// The fidl package contains general utility code for using FIDL in Dart.
+import 'package:fidl/fidl.dart' as fidl;
+// The generated Dart bindings for the Echo FIDL protocol
+import 'package:fidl_flutter_example_echo/fidl_async.dart' as fidl_echo;
+// The fuchsia_services package interfaces with the Fuchsia system. In particular, it is used
+// to expose a service to other components
+import 'package:fuchsia_services/services.dart' as sys;
+
+// Create an implementation for the Echo protocol by overriding the
+// fidl_echo.Echo class from the bindings
+class _EchoImpl extends fidl_echo.Echo {
+  // The stream controller for the stream of OnString events
+  final _onStringStreamController = StreamController<String>();
+
+  // Implementation of EchoString that just echoes the request value back
+  @override
+  Future<String?> echoString(String? value) async {
+    return value;
+  }
+}
+
+void main(List<String> args) {
+  // Create the component context. We should not serve outgoing before we add
+  // the services.
+  final context = sys.ComponentContext.create();
+  // Each FIDL protocol class has an accompanying Binding class, which takes
+  // an implementation of the protocol and a channel, and dispatches incoming
+  // requests on the channel to the protocol implementation.
+  final binding = fidl_echo.EchoBinding();
+  // Serves the implementation by passing it a handler for incoming requests,
+  // and the name of the protocol it is providing.
+  final echo = _EchoImpl();
+  // Add the outgoing service, and then serve the outgoing directory.
+  context.outgoing
+    ..addPublicService<fidl_echo.Echo>(
+        (fidl.InterfaceRequest<fidl_echo.Echo> serverEnd) =>
+            binding.bind(echo, serverEnd),
+        fidl_echo.Echo.$serviceName)
+    ..serveFromStartupInfo();
+}

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/dart_jit_echo_server/meta/dart-jit-echo-server.cml

@@ -0,0 +1,20 @@
+// 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: [ "syslog/client.shard.cml" ],
+    program: {
+        runner: "dart_jit_runner",
+    },
+    // Capabilities provided by this component.
+    capabilities: [
+        { protocol: "flutter.example.echo.Echo" },
+    ],
+    expose: [
+        {
+            protocol: "flutter.example.echo.Echo",
+            from: "self",
+        },
+    ],
+}

shell/platform/fuchsia/dart_runner/tests/startup_integration_test/dart_jit_runner/meta/dart-jit-runner-integration-test.cml

@@ -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: [
+        "gtest_runner.shard.cml",
+        "sys/component/realm_builder_absolute.shard.cml",
+
+        // This test needs both the vulkan facet and the hermetic-tier-2 facet,
+        // so we are forced to make it a system test.
+        "sys/testing/system-test.shard.cml",
+    ],
+    program: {
+        binary: "bin/app",
+    },
+    offer: [
+        {
+            // Offer capabilities needed by components in this test realm.
+            // Keep it minimal, describe only what's actually needed.
+            protocol: [
+                "fuchsia.logger.LogSink",
+                "fuchsia.sysmem.Allocator",
+                "fuchsia.tracing.provider.Registry",
+                "fuchsia.vulkan.loader.Loader",
+            ],
+            from: "parent",
+            to: "#realm_builder",
+        },
+    ],
+}