public void ExpectedFalse_ActualFalse()
    {
        var vm = new BooleanModel {WannaTrue = false};

        var validations = vm.Validate(vm.WannaFalse, _wannaFalse);
        validations.Print(_output);

        Assert.Empty(validations);
    }
    public void ExpectedFalse_ActualTrue()
    {
        var vm = new BooleanModel {WannaFalse = true};

        var validations = vm.Validate(vm.WannaFalse, _wannaFalse);
        validations.Print(_output);

        Assert.Collection(validations, v =>
                              v.ErrorMessage = "Unchecked is required");
    }