Implement event sender service for testing

This service lets us send Mojo events during testing.

R=eseidel@chromium.org, esprehn@chromium.org

Review URL: https://codereview.chromium.org/716043002

engine/src/flutter/tests/services/event-sender-expected.txt

@@ -0,0 +1,6 @@
+#BEGIN
+Running 1 tests
+ok 1 Sky event sender should be able to send events
+1 tests
+1 pass
+0 fail

engine/src/flutter/tests/services/event-sender.sky

@@ -0,0 +1,35 @@
+<sky>
+<import src="../resources/chai.sky" />
+<import src="../resources/mocha.sky" />
+<import src="/mojo/services/public/interfaces/input_events/input_event_constants.mojom.sky" as="constants" />
+<import src="/mojo/services/public/interfaces/input_events/input_events.mojom.sky" as="events" />
+<import src="/sky/framework/shell.sky" as="shell" />
+<import src="/sky/services/testing/test_harness.mojom.sky" as="harness" />
+
+<script>
+describe('Sky event sender', function() {
+  it('should be able to send events', function(done) {
+    var sky = document.querySelector('sky')
+    sky.focus();
+    sky.addEventListener('keypress', function(event) {
+      assert.equal(event.type, 'keypress');
+      assert.equal(event.keyCode, 0x41);
+      done();
+    });
+
+    var testHarness = shell.connectToService(
+        "mojo:sky_tester", harness.TestHarness);
+    testHarness.dispatchInputEvent(new events.Event({
+      action: constants.EventType.KEY_PRESSED,
+      key_data: new events.KeyData({
+        native_key_code: 0x41,
+        text: 0x41,
+        unmodified_text: 0x41,
+        is_char: true,
+        character: 0x41,
+      }),
+    }));
+  });
+});
+</script>
+</sky>

engine/src/flutter/tools/tester/BUILD.gn

@@ -25,6 +25,7 @@ shared_library("tester") {
     "//mojo/services/public/cpp/view_manager",
     "//mojo/services/public/interfaces/input_events",
     "//mojo/services/window_manager:lib",
+    "//sky/services/testing:bindings",
     "//sky/viewer:bindings",
   ]
 }

engine/src/flutter/tools/tester/test_harness_impl.cc

@@ -25,5 +25,10 @@ void TestHarnessImpl::OnTestComplete(const mojo::String& test_result) {
     test_runner_->OnTestComplete(test_result);
 }
 
+void TestHarnessImpl::DispatchInputEvent(mojo::EventPtr event) {
+  if (test_runner_)
+    test_runner_->client()->DispatchInputEvent(event.Pass());
+}
+
 }  // namespace tester
 }  // namespace sky

engine/src/flutter/tools/tester/test_harness_impl.h

@@ -8,7 +8,7 @@
 #include "base/memory/weak_ptr.h"
 #include "mojo/public/cpp/application/interface_factory_impl.h"
 #include "mojo/public/cpp/system/core.h"
-#include "sky/viewer/services/test_harness.mojom.h"
+#include "sky/services/testing/test_harness.mojom.h"
 
 namespace sky {
 namespace tester {
@@ -22,6 +22,7 @@ class TestHarnessImpl : public mojo::InterfaceImpl<TestHarness> {
  private:
   // TestHarness implementation.
   void OnTestComplete(const mojo::String& test_result) override;
+  void DispatchInputEvent(mojo::EventPtr event) override;
 
   base::WeakPtr<TestRunner> test_runner_;
 

engine/src/flutter/tools/tester/test_runner.cc

@@ -13,6 +13,9 @@
 namespace sky {
 namespace tester {
 
+TestRunnerClient::~TestRunnerClient() {
+}
+
 TestRunner::TestRunner(TestRunnerClient* client, mojo::View* container,
     const std::string& url)
     : test_harness_factory_(this),

engine/src/flutter/tools/tester/test_runner.h

@@ -18,6 +18,10 @@ namespace tester {
 class TestRunnerClient {
  public:
   virtual void OnTestComplete() = 0;
+  virtual void DispatchInputEvent(mojo::EventPtr event) = 0;
+
+ protected:
+  virtual ~TestRunnerClient();
 };
 
 class TestRunner {
@@ -26,6 +30,9 @@ class TestRunner {
       const std::string& url);
   virtual ~TestRunner();
 
+  TestRunnerClient* client() const { return client_; }
+  TestHarnessFactory* test_harness_factory() { return &test_harness_factory_; }
+
   base::WeakPtr<TestRunner> GetWeakPtr();
   void OnTestStart();
   void OnTestComplete(const std::string& test_result);

engine/src/flutter/tools/tester/tester.cc

@@ -56,6 +56,8 @@ class SkyTester : public mojo::ApplicationDelegate,
   virtual bool ConfigureIncomingConnection(
       mojo::ApplicationConnection* connection) override {
     window_manager_app_->ConfigureIncomingConnection(connection);
+    if (test_runner_)
+      connection->AddService(test_runner_->test_harness_factory());
     return true;
   }
 
@@ -118,6 +120,10 @@ class SkyTester : public mojo::ApplicationDelegate,
     ScheduleRun();
   }
 
+  void DispatchInputEvent(mojo::EventPtr event) override {
+    window_manager_app_->DispatchInputEventToView(content_, event.Pass());
+  }
+
   scoped_ptr<mojo::WindowManagerApp> window_manager_app_;
 
   std::string url_from_args_;