Add new index with the same id doesn't work

[kromash]

Hello,

I'm wondering why adding new index with the same id does not replace previous index. I found out that entry with the same id is appended to list and then when using get it returns first entry that was inserted instead of last.

For example following test fails:

@elasticmock
def test_es_mock():
    es_mock = elasticsearch.Elasticsearch(hosts=[{'host': 'localhost', 'port': 9200}])

    es_mock.index(index='m', doc_type='t', id='1', body={'test': 1})
    es_mock.index(index='m', doc_type='t', id='1', body={'test': 3})
    es_reposne = es_mock.get(index='m', doc_type='t', id='1')
    found_doc = es_reposne['_source']
    assert found_doc['test'] == 3