Just had a crack at writing unit tests with the dotnet SDK and it is pretty awesome so far

I’m working on examples and docs for this, would love to know more about your experience/examples!

My experience is very good so far. I think the two things that I wish they were already part of the default experience is

Deployment.TestAsync

to return all the resources without a need from me to do mocking so I ended up with having this little helper to return resources:

public static async Task<ImmutableArray<Resource>> TestAsync<TStack>(
            TestOptions options = null)
            where TStack : Stack, new()
        {
            var mock = new Mock<IMocks>();

            mock.Setup(m => m.NewResourceAsync(It.IsAny<string>(), It.IsAny<string>(),
                    It.IsAny<ImmutableDictionary<string, object>>(), It.IsAny<string>(), It.IsAny<string>()))
                .ReturnsAsync((string resource, string name, ImmutableDictionary<string, object> inputs, string provider,
                    string id) => (name + "-test", inputs));
            var resources = await Deployment.TestAsync<MyStack>(mock.Object);
            return resources;
        }

The other one is to extract the value of

Output

variables:

public static class OutputExtensions
    {
        public static T GetValue<T>(this Output<T> output)
        {
            T result=default;
            output.Apply(x => result = x);
            return result;
        }
    }

so to validate that a resource group has tags of product on it, my test looks like this

[Fact]
public async Task AllResourceGroups_Should_Have_ProductName_Tag()
{
    var resources = await TestAsync<MyStack>();
    var resourceGroups = resources.OfType<Pulumi.Azure.Core.ResourceGroup>();
    resourceGroups.ShouldAllBe(rg =>rg.Tags.GetValue().ContainsKey("productname"));
}

Right, I have two helper methods very similar to yours 🙂

My

TestStack

is inspired from the your

TestProperty

that was part of the unit tests pull request so credit to you 😉