Increase test coverage to >90%

[danielberkompas]

No description provided.

[DanielZendejas]

Hi, first of all thanks for the great library!

I'd be happy to help with this. The command mix test --cover yields the following results:

COV    FILE                                        LINES RELEVANT   MISSED
 73.1% lib/elasticsearch.ex                          354       26        7
  0.0% lib/elasticsearch/api/api.ex                   20        0        0
 91.7% lib/elasticsearch/api/http.ex                  52       12        1
100.0% lib/elasticsearch/application.ex               20        3        0
 91.7% lib/elasticsearch/config.ex                   132       12        1
 87.5% lib/elasticsearch/exception.ex                 65        8        1
 50.0% lib/elasticsearch/executable.ex                43        8        4
 75.0% lib/elasticsearch/indexing/bulk.ex            132       24        6
 97.3% lib/elasticsearch/indexing/index.ex           285       37        1
100.0% lib/elasticsearch/storage/data_stream.ex       75        5        0
  0.0% lib/elasticsearch/storage/store.ex              8        0        0
 69.0% lib/mix/elasticsearch.build.ex                148       29        9
  0.0% lib/mix/elasticsearch.install.ex               71       20       20
100.0% test/support/post.ex                           17        4        0
100.0% test/support/store.ex                          21        3        0
[TOTAL]  73.8%

Has anybody already started with something? I'd like to avoid double efforts.

[danielberkompas]

Nobody is working on this right now, so if you would like to try your hand at it, feel free!