public async void GetFirstOrDefaultDataEntity_WithNoResults_ReturnsNull()
{
var dataSourceMock = new Mock <IDataSource <TestModel> >();
dataSourceMock.Setup(m => m.GetIQueryable()).ReturnsAsync(
new List <TestModel>()
{
new TestModel()
{
id = 2, order = 1
},
new TestModel()
{
id = 3, order = 2
},
new TestModel()
{
id = 10, order = 3
}
}.AsQueryable());
IQueryRepository <TestModel> queryRepository = new QueryRepository <TestModel>(dataSourceMock.Object);
var result = await queryRepository.GetFirstOrDefaultDataEntity(new TestSpecification(9));
Assert.Null(result);
}