我无法让我的单元测试正常工作。
它在我的集成测试中工作,它实际上会访问 Azure 表存储。
我猜问题是对属性 QueryableEntities 的模拟,它返回 Queryable<Word>
来自模拟,但它返回一个 DataServiceQuery 来自 ServiceContext 类。是否可以创建一个类型为 DataServiceQuery 并返回 Queryable 的 stub ?
这是我的代码:
测试
[TestMethod]
public void GetAExistingWordInStorageShouldReturnCorrectWord()
{
Word expected = new Word(Dictionaries.Swedish.ToString(), "Word", "Word");
List<Word> Words = new List<Word>();
Words.Add(new Word(Dictionaries.Swedish.ToString(), "Word", "Word"));
IQueryable<Word> WordQueryable = Words.AsQueryable<Word>();
var mock = new Mock<IServiceContext<Word>>();
mock.Setup(x => x.QueryableEntities).Returns(WordQueryable);
DictionaryRepository dr = new DictionaryRepository(Models.Dictionaries.Swedish, "testdictionaries");
dr.Context = mock.Object;
Word result = dr.GetWord(expected.Text, false);
Assert.AreEqual(expected, result);
}
IServiceContect 接口(interface)
public interface IServiceContext<TEntity>
{
IQueryable<TEntity> QueryableEntities {get;}
}
ServiceContext 类
public class ServiceContext<TEntity> : TableServiceContext, IServiceContext<TEntity> where TEntity : TableServiceEntity
{
private readonly string tableName;
public ServiceContext(CloudStorageAccount account, String tableName)
: base(account.TableEndpoint.ToString(), account.Credentials)
{
this.tableName = tableName;
this.IgnoreResourceNotFoundException = true;
}
public IQueryable<TEntity> QueryableEntities
{
get
{
return CreateQuery<TEntity>(tableName);
}
}
}
词典库
public class DictionaryRepository : IDictionaryRepository
{
public Dictionaries Dictionary { get; set; }
public String TableName;
public IServiceContext<Word> Context;
public DictionaryRepository(Dictionaries dictionary)
: this(dictionary, "dictionaries")
{
}
public DictionaryRepository(Dictionaries dictionary, String tableName)
{
Dictionary = dictionary;
this.TableName = tableName;
CloudStorageAccount account = CloudStorageAccount.Parse(***);
Context = new ServiceContext<Word>(account, this.TableName);
}
public List<Tile> GetValidTiles()
{
throw new NotImplementedException();
}
public Type ResolveEntityType(String name)
{
return typeof(Word);
}
public Word GetWord(string word, Boolean useCache = false)
{
var q = this.Context.QueryableEntities.Where(x => x.PartitionKey == Dictionary.ToString() && x.RowKey == word).AsTableServiceQuery();
Word result = q.Execute().SingleOrDefault();
if (result == null)
return null;
return result;
}}
我收到以下错误
错误:
ArgumentNullException was unhandled by user code
Value cannot be null.
Parameter name: query
在 DictionaryRepository 类的以下行中调用 .AsTableServiceQuery() 时出现错误:
var q = this.Context.QueryableEntities.Where(x => x.PartitionKey == Dictionary.ToString() && x.RowKey == word).AsTableServiceQuery();
最佳答案
你没有提到你遇到的错误,但是自从 QueryableEntities
是只读属性尝试使用 mock.SetupGet
而不是 mock.Setup
.
编辑:
进一步调查,问题是 .AsTableServiceQuery()
扩展方法尝试转换 IQueryable<T>
到 DataServiceQuery<T>
,失败导致空异常。
Frederic Boerr 发表了一篇关于如何使用表存储进行单元测试的帖子,应该可以帮助您解决问题。 Windows Azure Storage: TDD and mocks
关于c# - 如何使用 Moq 对带有 stub 的 Windows Azure 表查询进行单元测试?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9150312/