Testing for Get Actions in Pulumi

TestStack.cs

using System.Collections.Immutable;
using System.Threading.Tasks;
using Moq;
using Pulumi;
using Pulumi.AzureNative.Resources;
using Pulumi.AzureNative.Storage;
using Pulumi.AzureNative.Storage.Inputs;
using Pulumi.Testing;
using Xunit;
using System.Linq;

namespace pulumi_get_unittest
{
    public class UnitTest1
    {
        public static Task<ImmutableArray<Pulumi.Resource>> RunAsync<T>() where T : Stack, new()
        {
            var mocks = new Mock<IMocks>();
            mocks.Setup(m => m.NewResourceAsync(It.IsAny<string>(), It.IsAny<string>(),
                    It.IsAny<ImmutableDictionary<string, object>>(), It.IsAny<string>(), It.IsAny<string>()))
                .ReturnsAsync((string type, string name, ImmutableDictionary<string, object> inputs, string? provider, string? id) => (id ?? "", inputs));
            mocks.Setup(m => m.CallAsync(It.IsAny<string>(), It.IsAny<ImmutableDictionary<string, object>>(), It.IsAny<string>()))
                .ReturnsAsync((string token, ImmutableDictionary<string, object> args, string? provider) => args);
            return Pulumi.Deployment.TestAsync<T>(mocks.Object, new TestOptions { IsPreview = false });
        }

        [Fact]
        public async Task Test1()
        {
            var resources = await RunAsync<TestStack>();
            var account = resources.OfType<StorageAccount>().FirstOrDefault();
            account.Name.Apply(n => {
                Assert.StartsWith("test", n);
                return false;
            });
        }
    }
    
    public class TestStack : Stack
    {
        [Output]
        public Output<string> StorageConnectionString { get; set; }

        public TestStack()
        {
            var resourceGroup = new ResourceGroup("test");
            var appStorage = new StorageAccount("test", new StorageAccountArgs
            {
                ResourceGroupName = resourceGroup.Name,
                Sku = new SkuArgs
                {
                    Name = SkuName.Standard_LRS,
                },
                Kind = Pulumi.AzureNative.Storage.Kind.StorageV2,
            });

            var accountKeys = Output.Tuple(resourceGroup.Name, appStorage.Name)
                .Apply(p => ListStorageAccountKeys.InvokeAsync(new ListStorageAccountKeysArgs
                    {
                        ResourceGroupName = p.Item1,
                        AccountName = p.Item2
                    }));

            this.StorageConnectionString = Output.Format($"DefaultEndpointsProtocol=https;AccountName={appStorage.Name};AccountKey={accountKeys.Apply(a => a.Keys[0].Value)}");            
        }
    }
}