Implement utility-side proxy resolver factory Mojo service.

net/proxy/mojo_proxy_resolver_factory_impl_unittest.cc

+// Copyright 2015 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 "net/proxy/mojo_proxy_resolver_factory_impl.h"
+
+#include "net/proxy/mock_proxy_resolver.h"
+#include "net/test/event_waiter.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/binding.h"
+#include "third_party/mojo/src/mojo/public/cpp/bindings/error_handler.h"
+
+namespace net {
+namespace {
+
+class FakeProxyResolver : public MockAsyncProxyResolverExpectsBytes {
+ public:
+  explicit FakeProxyResolver(const base::Closure& on_destruction)
+      : on_destruction_(on_destruction) {}
+
+  ~FakeProxyResolver() override { on_destruction_.Run(); }
+
+ private:
+  const base::Closure on_destruction_;
+};
+
+}  // namespace
+
+class MojoProxyResolverFactoryImplTest : public testing::Test,
+                                         public mojo::ErrorHandler {
+ protected:
+  enum Event {
+    NONE,
+    RESOLVER_CREATED,
+    CONNECTION_ERROR,
+  };
+
+  void SetUp() override {
+    new MojoProxyResolverFactoryImpl(
+        base::Bind(&MojoProxyResolverFactoryImplTest::CreateFakeProxyResolver,
+                   base::Unretained(this)),
+        mojo::GetProxy(&factory_));
+  }
+
+  void OnConnectionError() override { waiter_.NotifyEvent(CONNECTION_ERROR); }
+
+  scoped_ptr<ProxyResolver> CreateFakeProxyResolver(
+      HostResolver* host_resolver) {
+    EXPECT_TRUE(host_resolver);
+    instances_created_++;
+    waiter_.NotifyEvent(RESOLVER_CREATED);
+    return make_scoped_ptr(new FakeProxyResolver(base::Bind(
+        &MojoProxyResolverFactoryImplTest::OnFakeProxyInstanceDestroyed,
+        base::Unretained(this))));
+  }
+
+  void OnFakeProxyInstanceDestroyed() { instances_destroyed_++; }
+
+  interfaces::ProxyResolverFactoryPtr factory_;
+
+  int instances_created_ = 0;
+  int instances_destroyed_ = 0;
+
+  EventWaiter<Event> waiter_;
+};
+
+TEST_F(MojoProxyResolverFactoryImplTest, DisconnectHostResolver) {
+  interfaces::ProxyResolverPtr proxy_resolver;
+  interfaces::HostResolverPtr host_resolver;
+  mojo::InterfaceRequest<interfaces::HostResolver> host_resolver_request =
+      mojo::GetProxy(&host_resolver);
+  factory_->CreateResolver(mojo::GetProxy(&proxy_resolver),
+                           host_resolver.Pass());
+  proxy_resolver.set_error_handler(this);
+  waiter_.WaitForEvent(RESOLVER_CREATED);
+  EXPECT_EQ(1, instances_created_);
+  EXPECT_EQ(0, instances_destroyed_);
+  host_resolver_request = mojo::InterfaceRequest<interfaces::HostResolver>();
+  waiter_.WaitForEvent(CONNECTION_ERROR);
+  EXPECT_EQ(1, instances_created_);
+  EXPECT_EQ(1, instances_destroyed_);
+}
+
+TEST_F(MojoProxyResolverFactoryImplTest, DisconnectProxyResolverClient) {
+  interfaces::ProxyResolverPtr proxy_resolver;
+  interfaces::HostResolverPtr host_resolver;
+  mojo::InterfaceRequest<interfaces::HostResolver> host_resolver_request =
+      mojo::GetProxy(&host_resolver);
+  mojo::Binding<interfaces::HostResolver> binding(nullptr, &host_resolver);
+  binding.set_error_handler(this);
+  factory_->CreateResolver(mojo::GetProxy(&proxy_resolver),
+                           host_resolver.Pass());
+  waiter_.WaitForEvent(RESOLVER_CREATED);
+  EXPECT_EQ(1, instances_created_);
+  EXPECT_EQ(0, instances_destroyed_);
+  proxy_resolver.reset();
+  waiter_.WaitForEvent(CONNECTION_ERROR);
+  EXPECT_EQ(1, instances_created_);
+  EXPECT_EQ(1, instances_destroyed_);
+}
+
+}  // namespace net