public async Task UniqueIndexActorExist_ExpectTrue() { var stateManager = new Mock <IActorStateManager>(); var state = new Dictionary <string, string> { { "Test1", Guid.NewGuid().ToString() }, { "Test2", Guid.NewGuid().ToString() }, { "Test3", Guid.NewGuid().ToString() }, { "Test4", Guid.NewGuid().ToString() }, { "Test5", Guid.NewGuid().ToString() }, { "Test6", Guid.NewGuid().ToString() }, { "Test7", Guid.NewGuid().ToString() } }; stateManager.Setup(manager => manager.GetStateAsync <Dictionary <string, string> >(_stateName, It.IsAny <CancellationToken>())) .Returns(Task.FromResult(state)) .Verifiable(); UniqueIndexActor testDemoActor = await CreateActor(stateManager.Object, "Test UniqueIndexActor"); bool result = await testDemoActor.Exist("Test4"); result.Should().BeTrue(); stateManager.VerifyAll(); }