Indexer Throwing

In Explicit mode or when desired, configure indexer getters to throw. For setters, prefer verification via Called(Count...) and callbacks, optionally throwing from callbacks when validation fails.

Getter throwing

Example

imposter[Arg<int>.Any(), Arg<string>.Any(), Arg<object>.Any()]
    .Getter()
    .Throws<InvalidOperationException>();

var service = imposter.Instance();

// Read throws the configured exception
Should.Throw<InvalidOperationException>(() => _ = service[3, "err", new object()]);

Setter validation with throwing callbacks

Example

imposter[Arg<int>.Any()].Setter().Callback((key, value)
        => throw new InvalidOperationException("Callback error"));
Should.Throw<InvalidOperationException>(() => service[42] = 10);