public void Given_I_Call_FieldExists_Then_The_Correct_Services_Are_Called(FieldNameType fieldNameType)
{
//arrange
var dataModelMock = new Mock <IDatamodel>();
dataModelMock.As <IDefinitionScope2>();
dataModelMock.As <IDefinitionScope2>().Setup(d => d.FieldExists(fieldNameType.ToString())).Returns(It.IsAny <bool>());
_dataModelServiceMock.Setup(d => d.GetDataModel(_connectionModel, It.IsAny <string>(), It.IsAny <string>()))
.Returns(dataModelMock.Object);
//act
_sut.FieldExists(_connectionModel, _instrumentName, _serverParkName, fieldNameType);
//assert
_dataModelServiceMock.Verify(d => d.GetDataModel(_connectionModel, _instrumentName, _serverParkName), Times.Once);
}