mojo: add some end-to-end shell tests and a new test sample app

mojo/services/test_service/test_request_tracker_impl.cc

+// Copyright 2014 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 "base/bind.h"
+#include "mojo/services/test_service/test_request_tracker_impl.h"
+
+namespace mojo {
+namespace test {
+
+ TrackingContext::TrackingContext() : next_id(1) {}
+ TrackingContext::~TrackingContext() {}
+
+ TestRequestTrackerImpl::TestRequestTrackerImpl(
+     ApplicationConnection* connection,
+     TrackingContext* context) : context_(context), weak_factory_(this) {
+ }
+
+ TestRequestTrackerImpl::~TestRequestTrackerImpl() {
+ }
+
+void TestRequestTrackerImpl::RecordStats(
+      uint64_t client_id,
+      ServiceStatsPtr stats) {
+  assert(context_->ids_to_names.find(client_id) !=
+         context_->ids_to_names.end());
+  context_->records[client_id].push_back(*stats);
+}
+
+void TestRequestTrackerImpl::OnConnectionEstablished() {
+  uint64_t id = context_->next_id++;
+  client()->SetIdAndReturnName(id,
+      base::Bind(&TestRequestTrackerImpl::UploaderNameCallback,
+                 weak_factory_.GetWeakPtr(),
+                 id));
+}
+
+void TestRequestTrackerImpl::UploaderNameCallback(
+    uint64_t id, const mojo::String& name) {
+  DCHECK(context_->ids_to_names.find(id) == context_->ids_to_names.end());
+  context_->ids_to_names[id] = name;
+}
+
+TestTrackedRequestServiceImpl::TestTrackedRequestServiceImpl(
+    ApplicationConnection* connection,
+    TrackingContext* context) : context_(context) {
+}
+
+TestTrackedRequestServiceImpl::~TestTrackedRequestServiceImpl() {
+}
+
+void TestTrackedRequestServiceImpl::GetReport(
+    const mojo::Callback<void(mojo::Array<ServiceReportPtr>)>& callback) {
+  mojo::Array<ServiceReportPtr> reports;
+  for (AllRecordsMap::const_iterator it1 = context_->records.begin();
+       it1 != context_->records.end(); ++it1) {
+    ServiceReportPtr report(ServiceReport::New());
+    report->service_name = context_->ids_to_names[it1->first];
+    double mean_health_numerator = 0;
+    size_t num_samples = it1->second.size();
+    if (num_samples == 0)
+      continue;
+
+    for (std::vector<ServiceStats>::const_iterator it2 = it1->second.begin();
+         it2 != it1->second.end(); ++it2) {
+      report->total_requests += it2->num_new_requests;
+      mean_health_numerator += it2->health;
+    }
+    report->mean_health = mean_health_numerator / num_samples;
+    reports.push_back(report.Pass());
+  }
+  callback.Run(reports.Pass());
+}
+
+}  // namespace test
+}  // namespace mojo