我正在编写NUnit测试用例。我正在编写测试用例以获得一些价值。下面是我的设置。
[Test]
public async Task GetGeographyList_StateUnderTest_ExpectedBehavior()
{
// Arrange
var geographyBusinessLogic = this.CreateGeographyBusinessLogic();
Geography geographyObj = new Geography() { Id = 101, Country = "India", Region = "APAC", SubRegion = "Asia South" };
IEnumerable<Geography> geographyObjList = new List<Geography>() { geographyObj };
//this.geographyRepository.setupGetAsync<Geography>(geographyObjList);
this.geographyRepository.Setup(
x => x.GetAsync()).ReturnsAsync(geographyObjList);
// Act
var result = await geographyBusinessLogic.GetGeographyList();
// Assert
Assert.IsNotNull(result);
}
在上面的代码中,x => x.GetAsync()
引发错误:
表达式树可能不包含使用可选参数的调用或调用
下面是我对geographyBusinessLogic.GetGeographyList()
的实现:
public async Task<IEnumerable<GeographyEntity>> GetGeographyList()
{
var listOfGeographies = await this.GeographyRepository.GetAsync().ConfigureAwait(false);
IEnumerable<GeographyEntity> result = from o in listOfGeographies
select new GeographyEntity
{
Id = o.Id,
Country = o.Country,
Region = o.Region,
SubRegion = o.SubRegion
};
return result;
}
下面是GetAsync
方法的实现:
public async Task<IEnumerable<T>> GetAsync(Expression<Func<T, bool>> filter = null, Func<IQueryable<T>, IOrderedQueryable<T>> orderBy = null, params Expression<Func<T, object>>[] includes)
{
IQueryable<T> query = this.dbSet;
foreach (Expression<Func<T, object>> include in includes)
{
query = query.Include(include);
}
if (filter != null)
{
query = query.Where(filter);
}
if (orderBy != null)
{
query = orderBy(query);
}
return await query.ToListAsync().ConfigureAwait(false);
}
有人可以帮助我理解此错误,有人可以告诉我我在这里缺少什么吗?任何帮助将不胜感激。
设置模拟程序时,您需要填写所有可选参数。例如:
this.geographyRepository.Setup(x => x.GetAsync(
It.IsAny<Expression<Func<Geography, bool>>>(),
It.IsAny<Func<IQueryable<Geography>, IOrderedQueryable<Geography>>>(),
It.IsAny<Expression<Func<Geography, object>>[]>())).ReturnsAsync(geographyObjList);