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// Copyright (c) 2011 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 "base/logging.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop.h"
#include "dbus/message.h"
#include "dbus/mock_bus.h"
#include "dbus/mock_object_proxy.h"
#include "dbus/mock_exported_object.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
using ::testing::_;
using ::testing::Invoke;
using ::testing::Return;
using ::testing::Unused;
class MockTest : public testing::Test {
public:
MockTest() {
}
void SetUp() {
// Create a mock bus.
dbus::Bus::Options options;
options.bus_type = dbus::Bus::SYSTEM;
mock_bus_ = new dbus::MockBus(options);
// Create a mock proxy.
mock_proxy_ = new dbus::MockObjectProxy(mock_bus_.get(),
"org.chromium.TestService",
"/org/chromium/TestObject");
// Set an expectation so mock_proxy's CallMethodAndBlock() will use
// CreateMockProxyResponse() to return responses.
EXPECT_CALL(*mock_proxy_, CallMethodAndBlock(_, _))
.WillRepeatedly(Invoke(this, &MockTest::CreateMockProxyResponse));
// Set an expectation so mock_proxy's CallMethod() will use
// HandleMockProxyResponseWithMessageLoop() to return responses.
EXPECT_CALL(*mock_proxy_, CallMethod(_, _, _))
.WillRepeatedly(
Invoke(this,
&MockTest::HandleMockProxyResponseWithMessageLoop));
// Set an expectation so mock_bus's GetObjectProxy() for the given
// service name and the object path will return mock_proxy_.
EXPECT_CALL(*mock_bus_, GetObjectProxy("org.chromium.TestService",
"/org/chromium/TestObject"))
.WillOnce(Return(mock_proxy_.get()));
}
// Called when the response is received.
void OnResponse(dbus::Response* response) {
// |response| will be deleted on exit of the function. Copy the
// payload to |response_string_|.
if (response) {
dbus::MessageReader reader(response);
ASSERT_TRUE(reader.PopString(&response_string_));
}
message_loop_.Quit();
};
protected:
std::string response_string_;
MessageLoop message_loop_;
scoped_refptr<dbus::MockBus> mock_bus_;
scoped_refptr<dbus::MockObjectProxy> mock_proxy_;
private:
// Returns a response for the given method call. Used to implement
// CallMethodAndBlock() for |mock_proxy_|.
dbus::Response* CreateMockProxyResponse(dbus::MethodCall* method_call,
int timeout_ms) {
if (method_call->GetInterface() == "org.chromium.TestInterface" &&
method_call->GetMember() == "Echo") {
dbus::MessageReader reader(method_call);
std::string text_message;
if (reader.PopString(&text_message)) {
dbus::Response* response = dbus::Response::CreateEmpty();
dbus::MessageWriter writer(response);
writer.AppendString(text_message);
return response;
}
}
LOG(ERROR) << "Unexpected method call: " << method_call->ToString();
return NULL;
}
// Creates a response and runs the given response callback in the
// message loop with the response. Used to implement for |mock_proxy_|.
void HandleMockProxyResponseWithMessageLoop(
dbus::MethodCall* method_call,
int timeout_ms,
dbus::ObjectProxy::ResponseCallback response_callback) {
dbus::Response* response = CreateMockProxyResponse(method_call,
timeout_ms);
message_loop_.PostTask(FROM_HERE,
base::Bind(&MockTest::RunResponseCallback,
base::Unretained(this),
response_callback,
response));
}
// Runs the given response callback with the given response.
void RunResponseCallback(
dbus::ObjectProxy::ResponseCallback response_callback,
dbus::Response* response) {
response_callback.Run(response);
delete response;
}
};
// This test demonstrates how to mock a synchronos method call using the
// mock classes.
TEST_F(MockTest, CallMethodAndBlock) {
const char kHello[] = "Hello";
// Get an object proxy from the mock bus.
dbus::ObjectProxy* proxy = mock_bus_->GetObjectProxy(
"org.chromium.TestService",
"/org/chromium/TestObject");
// Create a method call.
dbus::MethodCall method_call("org.chromium.TestInterface", "Echo");
dbus::MessageWriter writer(&method_call);
writer.AppendString(kHello);
// Call the method.
scoped_ptr<dbus::Response> response(
proxy->CallMethodAndBlock(&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT));
// Check the response.
ASSERT_TRUE(response.get());
dbus::MessageReader reader(response.get());
std::string text_message;
ASSERT_TRUE(reader.PopString(&text_message));
// The text message should be echo'ed back.
EXPECT_EQ(kHello, text_message);
}
// This test demonstrates how to mock an asynchronos method call using the
// mock classes.
TEST_F(MockTest, CallMethod) {
const char kHello[] = "hello";
// Get an object proxy from the mock bus.
dbus::ObjectProxy* proxy = mock_bus_->GetObjectProxy(
"org.chromium.TestService",
"/org/chromium/TestObject");
// Create a method call.
dbus::MethodCall method_call("org.chromium.TestInterface", "Echo");
dbus::MessageWriter writer(&method_call);
writer.AppendString(kHello);
// Call the method.
proxy->CallMethod(&method_call,
dbus::ObjectProxy::TIMEOUT_USE_DEFAULT,
base::Bind(&MockTest::OnResponse,
base::Unretained(this)));
// Run the message loop to let OnResponse be called.
message_loop_.Run();
EXPECT_EQ(kHello, response_string_);
}
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