StorageFixture.cs

/**
 * Copyright 2021 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

using System;
using System.Collections.Generic;
using Google.Apis.Storage.v1.Data;
using Google.Cloud.Storage.V1;
using Google.Cloud.StorageTransfer.V1;
using Xunit;
namespace StorageTransfer.Samples.Tests
{
    [CollectionDefinition(nameof(StorageFixture))]
    public class StorageFixture : IDisposable, ICollectionFixture<StorageFixture>
    {
        public string ProjectId { get; }
        public string BucketNameSource { get; } = Guid.NewGuid().ToString();
        public string BucketNameSink { get; } = Guid.NewGuid().ToString();
        public string JobName { get; }
        public StorageClient Storage { get; } = StorageClient.Create();
        public StorageTransferServiceClient Sts { get; } = StorageTransferServiceClient.Create();

        public StorageFixture()
        {
            // Instantiate random number generator 
            Random random = new Random();
            JobName =  "transferJobs/" + random.NextInt64(1000000000000000, 9223372036854775807) + " ";

            ProjectId = Environment.GetEnvironmentVariable("GOOGLE_PROJECT_ID");
            if (string.IsNullOrWhiteSpace(ProjectId))
            {
                throw new Exception("You need to set the Environment variable 'GOOGLE_PROJECT_ID' with your Google Cloud Project's project id.");
            }

            CreateBucketAndGrantStsPermissions(BucketNameSink);
            CreateBucketAndGrantStsPermissions(BucketNameSource);
        }

        private void CreateBucketAndGrantStsPermissions(string bucketName)
        {
            var bucket = Storage.CreateBucket(ProjectId, new Bucket
            {
                Name = bucketName
            });

            string email = Sts.GetGoogleServiceAccount(new GetGoogleServiceAccountRequest()
            {
                ProjectId = ProjectId
            }).AccountEmail;
            string member = "serviceAccount:" + email;
            string objectViewer = "roles/storage.objectViewer";
            string bucketReader = "roles/storage.legacyBucketReader";
            string bucketWriter = "roles/storage.legacyBucketWriter";

            var policy = Storage.GetBucketIamPolicy(bucketName, new GetBucketIamPolicyOptions
            {
                RequestedPolicyVersion = 3
            });
            // Set the policy schema version. For more information, please refer to https://cloud.google.com/iam/docs/policies#versions.
            policy.Version = 3;

            Policy.BindingsData objectViewerBinding = new Policy.BindingsData
            {
                Role = objectViewer,
                Members = new List<string> { member }
            };
            Policy.BindingsData bucketReaderBinding = new Policy.BindingsData
            {
                Role = bucketReader,
                Members = new List<string> { member }
            };
            Policy.BindingsData bucketWriterBinding = new Policy.BindingsData
            {
                Role = bucketWriter,
                Members = new List<string> { member }
            };

            policy.Bindings.Add(objectViewerBinding);
            policy.Bindings.Add(bucketReaderBinding);
            policy.Bindings.Add(bucketWriterBinding);

            Storage.SetBucketIamPolicy(bucketName, policy);
        }

        public void Dispose()
        {
            try
            {
                Storage.DeleteBucket(BucketNameSink);
            }
            catch (Exception)
            {
                // Do nothing, we delete on a best effort basis.
            }
            try
            {
                Storage.DeleteBucket(BucketNameSource);
            }
            catch (Exception)
            {
                // Do nothing, we delete on a best effort basis.
            }
        }
    }
}