Google Cloud IAM C++ Client  1.32.1
A C++ Client Library for Google Cloud IAM
Testing your Cloud IAM application with googlemock

This document describes how to test your own Cloud IAM application using the Cloud IAM C++ client library, Google Test and the Google Test Mocking Framework.

Mocking a Successful IAMClient::GetServiceAccount() call

First include the headers for the Cloud IAM Client, the mocking class, and the Google Mock framework:

The example uses a number of aliases to save typing and improve readability:

using ::google::cloud::iam_mocks::MockIAMConnection;
namespace iam = ::google::cloud::iam;

Create a mocking object for google::cloud::iam::IAMConnection:

auto mock = std::make_shared<MockIAMConnection>();

It is customary to first setup the expectations for your mock, and then write the rest of the code:

EXPECT_CALL(*mock, GetServiceAccount)
.WillOnce([&](google::iam::admin::v1::GetServiceAccountRequest const&
request) {
EXPECT_EQ("test-project-name", request.name());
google::iam::admin::v1::ServiceAccount service_account;
service_account.set_unique_id("test-unique-id");
return google::cloud::StatusOr<google::iam::admin::v1::ServiceAccount>(
service_account);
});

With the expectations in place, create a google::cloud::iam::IAMClient object:

iam::IAMClient iam_client(mock);
Creates and manages Identity and Access Management (IAM) resources.
Definition: iam_client.h:57

And then make calls on the client as usual:

auto service_account = iam_client.GetServiceAccount("test-project-name");

And then verify the results meet your expectations:

EXPECT_TRUE(service_account.ok());
EXPECT_EQ("test-unique-id", service_account->unique_id());

Full Listing

Finally we present the full code for this example:

#include <gmock/gmock.h>
namespace {
using ::google::cloud::iam_mocks::MockIAMConnection;
namespace iam = ::google::cloud::iam;
TEST(MockGetServiceAccountExample, GetServiceAccount) {
auto mock = std::make_shared<MockIAMConnection>();
EXPECT_CALL(*mock, GetServiceAccount)
.WillOnce([&](google::iam::admin::v1::GetServiceAccountRequest const&
request) {
EXPECT_EQ("test-project-name", request.name());
google::iam::admin::v1::ServiceAccount service_account;
service_account.set_unique_id("test-unique-id");
return google::cloud::StatusOr<google::iam::admin::v1::ServiceAccount>(
service_account);
});
iam::IAMClient iam_client(mock);
auto service_account = iam_client.GetServiceAccount("test-project-name");
EXPECT_TRUE(service_account.ok());
EXPECT_EQ("test-unique-id", service_account->unique_id());
}
} // namespace