我正在用我的一個測試掙扎了一下。MStest任務結果爲空
下面是我測試
public async Task Handle(ReceiveEventsFromSalesForceCommand message, IMessageHandlerContext context)
{
var queryResult = await this.GenerateQueryResultAsync(message).ConfigureAwait(false);
await this.DetermineActionAsync(context, queryResult).ConfigureAwait(false);
}
public async Task<QueryResult<EventStore__c>> GenerateQueryResultAsync(ReceiveEventsFromSalesForceCommand message)
{
QueryResult<EventStore__c> queryResult;
if (string.IsNullOrWhiteSpace(message.NextRecordsUrl))
{
queryResult = await this.forceClient.QueryAsync<EventStore__c>(query).ConfigureAwait(false);
this.log.Info($"AFTER: QueryAllAsync<EventStore>(query), found {queryResult?.TotalSize ?? 0} records");
}
else
{
queryResult = await this.forceClient.QueryContinuationAsync<EventStore__c>(message.NextRecordsUrl).ConfigureAwait(false);
this.log.Info("AFTER: QueryContinuationAsync<EventStore>(query)");
}
return queryResult;
}
的代碼,這是我的單元測試
[TestMethod]
public async Task Test()
{
// arrange
var forceConfig = Substitute.For<ISalesForceCreationHandlerConfig>();
var forceClient = Substitute.For<IForceClient>();
forceClient.QueryAllAsync<EventStore__c>(Arg.Any<string>()).Returns(Task.FromResult(new QueryResult<EventStore__c> { NextRecordsUrl = "Dummy" }));
var messageHandlerContext = Substitute.For<IMessageHandlerContext>();
var handler = new SalesForceBatchCreationHandler(forceClient, null, forceConfig);
// act
await handler.Handle(new ReceiveEventsFromSalesForceCommand(), messageHandlerContext);
// assert
await messageHandlerContext.Received().Send(Arg.Is<ReceiveEventsFromSalesForceCommand>(command => string.IsNullOrWhiteSpace(command.NextRecordsUrl)), Arg.Any<SendOptions>());
await messageHandlerContext.DidNotReceive().SendLocal(Arg.Any<PublishMultipleKlantManagementEnvelopeCreatedEventsCommand>());
}
我的問題是我的GenerateQueryResultAsync
方法是iresult被null
,我得到一個NullReferenceException。我如何確保結果不爲空並避免異常?
備註:在第一個方法'Handle'中,省略異步/等待會更有效率。只需直接返回任務,因爲沒有理由在該方法中等待其完成(除非您在方法中未顯示任何內容)。 – Igor
是否有一個原因,爲什麼這不應該作爲http://stackoverflow.com/questions/4660142/what-is-a-nullreferenceexception-and-how-doi-i-fix-it重複關閉?是什麼讓你的案例變得特別,你不能簡單地在你需要它的地方有一個非空值? – nvoigt
您使用NSubstitute 1.9.0或更高版本嗎?看起來你正在扼殺'QueryAllAsync',但SUT正在調用'QueryAsync'。 –