Mock extension methods IElasticClient

Question

Is there a way to mock the following

        var result = await Client.SearchAsync<IndexedSite>(d => d
            .Index(SiteIndexName)
            .Query(q => q.MatchAll())
            .Sort(sd => sd.Field(s => s.Name, SortOrder.Ascending))
            .Take(c_maxSiteListSize));

Would one use .Callbacks in this situation?

My current setup:

    private Mock<IElasticClient> _client = new Mock<IElasticClient>();
    private Mock<ISearchResponse<IndexedSite>> indexedSite = new Mock<ISearchResponse<IndexedSite>>();

    _client.Setup(x =>
        x.SearchAsync<IndexedSite>(It.IsAny<Func<SearchDescriptor<IndexedSite>, ISearchRequest>>(),
            default(CancellationToken))).Returns(Task.FromResult(indexedSite.Object));

This works, and it does return indexedSite, however it does not 'Cover' .Index/.Query/.Sort/.Take extension methods, which is what I want.

No, it is not possible to Mock extension methods. You need to refactor and get rid of extension methods in order to make it testable — OlegI, Dec 10 '18 at 12:51
Also, you can use `.ReturnAsync` instead of `.Returns(Task.FromResult(...))` — OlegI, Dec 10 '18 at 13:47

score 0 · Accepted Answer · answered Feb 27 '19 at 19:57

0

Per @Olegl answer. It is not possible to Mock extension methods. You need to refactor and get rid of extension methods in order to make it testable

More info here

answered Feb 27 '19 at 19:57

ShaneKm

20,823
43
167
296

Mock extension methods IElasticClient

1 Answers1