$apply=filter(Status eq 1)/aggregate(price with average as averagePrice)

也许你可以参考现有的测试:

maybe you can refer the existing test:

https://github.com/OData/WebApi/blob/master/OData/test/E2ETest/WebStack.QA.Test.OData/Aggregation/AggregationTests.cs

https://github.com/OData/WebApi/blob/master/OData/test/UnitTest/System.Web.OData.Test/OData/Query/ApplyQueryOptionTest.cs