How do you do unit testing with Dapr? - unit-testing

Question

I've got a class that I'm trying to unit test but it uses a DaprClient object (from the SDK), which doesn't work in my unit test envioronment.
I would like to create a mock and use that instead but the only interface DaprClient implements is IDisposable.
Is there a way to mock DaprClient for unit tests?
The only solution I can think of would be to wrap DaprClient in a class with an interface and use this wrapper everywhere. This just feels really messy and will need the wrapper to be updated every time I want to use a new method on the DaprClient.
I'm open to other solutions which might bypass the problem but I'd prefer a simple replace with mock type approach.
I'm using .Net 5, xUnit and Moq in Visual Studio 2019 on Windows (although some team members use Macs so it needs to work on both platforms).
In this particular instance, I'm using the DaprClient.GetBulkSecretAsync method but I'd like a solution that I can use elsewhere, if possible.

Answer 1

You need to use one of two options
a mocking framework that uses shims as they make a mock object based on a concrete class. Fakes from visual studio enterprise and other paid frameworks have it. Fewer opensource frameworks have the option. Pose is one with the option perhaps via Shimmy
wrap the class in a class that uses a interface you can use for mocking (the worst possibility)

Answer 2

using Dapr.Client;
using FluentAssertions;
using Moq;
[TestMethod("How to mock GetBulkSecretAsync - 68362431")]
public async Task TestMethod1()
{
//arrange
var daprClient = new Mock<DaprClient>();
var exampleService = new ExampleService(daprClient.Object);
daprClient.Setup(d => d.GetBulkSecretAsync("my-store",
It.IsAny<IReadOnlyDictionary<string, string>>(),
It.IsAny<CancellationToken>()))
.ReturnsAsync(new Dictionary<string, Dictionary<string, string>>
{
{
"example",
new Dictionary<string, string>
{
{ "i don't understand the builk API (yet)", "some value" }
}
}
});
//act
var actual = await exampleService.GetBulkSecrets("my-store");
//assert
actual.Should().BeEquivalentTo(new Dictionary<string, Dictionary<string, string>>
{
{
"example",
new Dictionary<string, string>
{
{ "i don't understand the builk API (yet)", "some value" }
}
}
});
}
references:
full project
Accessing Dapr secrets building block using Dapr .NET SDK
but I'd like a solution that I can use elsewhere, if possible
In general, we need to use the abstract methods defined in the DarpClient.