Implement plugin side of sync EnumerateVideoCaptureDevices

ppapi/proxy/flash_resource_unittest.cc

+// Copyright (c) 2012 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 "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/proxy/ppapi_proxy_test.h"
+#include "ppapi/proxy/ppb_video_capture_proxy.h"
+#include "ppapi/shared_impl/scoped_pp_resource.h"
+#include "ppapi/thunk/thunk.h"
+
+namespace ppapi {
+namespace proxy {
+
+namespace {
+
+typedef PluginProxyTest FlashResourceTest;
+
+// This simulates the creation reply message of a VideoCapture resource. This
+// won't be necessary once VideoCapture is converted to the new-style proxy.
+class VideoCaptureCreationHandler : public IPC::Listener {
+ public:
+  VideoCaptureCreationHandler(ResourceMessageTestSink* test_sink,
+                              PP_Instance instance)
+      : test_sink_(test_sink),
+        instance_(instance) {
+  }
+  virtual ~VideoCaptureCreationHandler() {}
+
+  virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE {
+    if (msg.type() != ::PpapiHostMsg_PPBVideoCapture_Create::ID)
+      return false;
+
+    IPC::Message* reply_msg = IPC::SyncMessage::GenerateReply(&msg);
+    HostResource resource;
+    resource.SetHostResource(instance_, 12345);
+    ::PpapiHostMsg_PPBVideoCapture_Create::WriteReplyParams(reply_msg,

[yzshen1, 2012/10/05 18:16:46]

nit: unless necessary you don't need to use ::. I usually see people explicitly
use :: for system calls.

[raymes, 2012/10/08 17:08:50]

Done.

+                                                            resource);
+    test_sink_->SetSyncReplyMessage(reply_msg);
+    return true;
+  }
+ private:
+  ResourceMessageTestSink* test_sink_;
+  PP_Instance instance_;
+};
+
+void* Unused(void* user_data, uint32_t element_count, uint32_t element_size) {
+  return NULL;
+}
+
+}  // namespace
+
+// Does a test of EnumerateVideoDevicesSync() and reply functionality in
+// the plugin side using the public C interfaces.
+TEST_F(FlashResourceTest, EnumerateVideoDevicesSync) {
+  // TODO(raymes): This doesn't actually check that the data is converted from
+  // |ppapi::DeviceRefData| to |PPB_DeviceRef| correctly, just that the right
+  // messages are sent.
+
+  // Set up a sync call handler that should return this message.
+  std::vector<ppapi::DeviceRefData> reply_device_ref_data;
+  int32_t expected_result = PP_OK;
+  PpapiPluginMsg_Flash_EnumerateVideoDevicesSyncReply reply_msg(
+      reply_device_ref_data);
+  ResourceSyncCallHandler enumerate_video_devices_handler(
+      &sink(),
+      PpapiHostMsg_Flash_EnumerateVideoDevicesSync::ID,
+      expected_result,
+      reply_msg);
+  sink().AddFilter(&enumerate_video_devices_handler);
+
+  // Setup the handler to simulate creation of the video resource.
+  VideoCaptureCreationHandler video_creation_handler(&sink(), pp_instance());
+  sink().AddFilter(&video_creation_handler);
+
+  // Set up the arguments to the call.
+  ScopedPPResource video_capture(ScopedPPResource::PassRef(),
+      PPB_VideoCapture_Proxy::CreateProxyResource(pp_instance()));
+  std::vector<PP_Resource> device_ref_resources;
+  PP_ArrayOutput output;
+  output.GetDataBuffer = &Unused;
+  output.user_data = &device_ref_resources;

[yzshen1, 2012/10/05 18:16:46]

Why we need device_ref_resources?

[raymes, 2012/10/08 17:08:50]

There are some checks to make sure the PP_ArrayOutput is valid. I changed the
variable name to "unused". Later, when PPB_VideoCapture_Dev is converted to the
new resource model, this test will change to test that the resources are valid
as well.

[yzshen1, 2012/10/08 19:44:25]

Ah, I didn't know. Thanks!

+
+  // Make the call.
+  const PPB_Flash_12_6* flash_iface = ::ppapi::thunk::GetPPB_Flash_12_6_Thunk();
+  int32_t actual_result = flash_iface->EnumerateVideoDevicesSync(
+      pp_instance(), video_capture.get(), output);
+
+  // Check the result is as expected.
+  EXPECT_EQ(expected_result, actual_result);
+
+  // Should have sent an "EnumerateVideoDevicesSync" message.
+  ASSERT_TRUE(enumerate_video_devices_handler.last_handled_msg().type() ==
+      PpapiHostMsg_Flash_EnumerateVideoDevicesSync::ID);
+
+  // Remove the filter or it will be destroyed before the sink() is destroyed.
+  sink().RemoveFilter(&enumerate_video_devices_handler);
+  sink().RemoveFilter(&video_creation_handler);
+}
+
+}  // namespace proxy
+}  // namespace ppapi