CODEWITHSUNDEEP
c#.netunit-testingmockingmoq
Alwyn
Alwyn

Reputation: 8337

How to reroute MOQ call?

Trying to mock the following interface, but finding the syntax really awkward to work with.

public interface IKvpStoreRepository
{
    string this[string key] { get; set; }

    Task<bool> ContainsKey(string key);
}

Now I'm hoping to record the value into a backing store as below:

var backingStore = new Dictionary<string,string>();
var mockKvpRepository = new Mock<IKvpStoreRepository>();
mockKvpRepository.
    Setup(_ => _[It.IsAny<string>()] = It.IsAny<Task<string>>()) //BROKE [1]
    .Callback((key,value) => backingStore[key] = value) //??? [2]
    .ReturnsAsync("blah"); //??? [3]

[1] Expression tree may not contain assignment.

[2] How do I get both key and value?

Upvotes: 0

Views: 55

Answers (1)

stuartd
stuartd

Reputation: 73253

This test passes.

[Test]
public void q35387809() {
    var backingStore = new Dictionary<string, string>();
    var mockKvpRepository = new Mock<IKvpStoreRepository>();

    mockKvpRepository.SetupSet(x => x["blah"] = It.IsAny<string>())
        .Callback((string name, string value) => { backingStore[name] = value; });

    mockKvpRepository.Object["blah"] = "foo";

    backingStore.Count.Should().Be(1);
    backingStore["blah"].Should().Be("foo");
}

Upvotes: 1

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