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ElasticMock

Python Elasticsearch Mock for test purposes

    1.8.1

Maintainers
1

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ElasticMock

Python Elasticsearch Mock for test purposes

Build Status Coverage Status PyPI version GitHub license PyPI - Python Version ElasticSearch Version

Libraries.io dependency status for latest release Downloads

Installation

pip install ElasticMock

Usage

To use ElasticMock, decorate your test method with @elasticmock decorator:

from unittest import TestCase

from elasticmock import elasticmock


class TestClass(TestCase):

    @elasticmock
    def test_should_return_something_from_elasticsearch(self):
        self.assertIsNotNone(some_function_that_uses_elasticsearch())

Custom Behaviours

You can also force the behaviour of the ElasticSearch instance by importing the elasticmock.behaviour module:

from unittest import TestCase

from elasticmock import behaviour


class TestClass(TestCase):

    ...

    def test_should_return_internal_server_error_when_simulate_server_error_is_true(self):
        behaviour.server_failure.enable()
        ...
        behaviour.server_failure.disable()

You can also disable all behaviours by calling behaviour.disable_all() (Consider put this in your def tearDown(self) method)

Available Behaviours
  • server_failure: Will make all calls to ElasticSearch returns the following error message:
    {
        'status_code': 500,
        'error': 'Internal Server Error'
    }
    

Code example

Let's say you have a prod code snippet like this one:

import elasticsearch

class FooService:

    def __init__(self):
        self.es = elasticsearch.Elasticsearch(hosts=[{'host': 'localhost', 'port': 9200}])

    def create(self, index, body):
        es_object = self.es.index(index, body)
        return es_object.get('_id')

    def read(self, index, id):
        es_object = self.es.get(index, id)
        return es_object.get('_source')

Than you should be able to test this class by mocking ElasticSearch using the following test class:

from unittest import TestCase
from elasticmock import elasticmock
from foo.bar import FooService

class FooServiceTest(TestCase):

    @elasticmock
    def should_create_and_read_object(self):
        # Variables used to test
        index = 'test-index'
        expected_document = {
            'foo': 'bar'
        }

        # Instantiate service
        service = FooService()

        # Index document on ElasticSearch
        id = service.create(index, expected_document)
        self.assertIsNotNone(id)

        # Retrive dpcument from ElasticSearch
        document = service.read(index, id)
        self.assertEquals(expected_document, document)

Notes:

  • The mocked search method returns all available documents indexed on the index with the requested document type.
  • The mocked suggest method returns the exactly suggestions dictionary passed as body serialized in Elasticsearch.suggest response. Atention: If the term is an int, the suggestion will be python term + 1. If not, the suggestion will be formatted as python {0}_suggestion.format(term) . Example:
    • Suggestion Body:
    suggestion_body = {
        'suggestion-string': {
            'text': 'test_text',
            'term': {
                'field': 'string'
            }
        },
        'suggestion-id': {
            'text': 1234567,
            'term': {
                'field': 'id'
            }
        }
    }
    
    • Suggestion Response:
    {
        'suggestion-string': [
            {
                'text': 'test_text',
                'length': 1,
                'options': [
                    {
                        'text': 'test_text_suggestion',
                        'freq': 1,
                        'score': 1.0
                    }
                ],
                'offset': 0
            }
        ],
        'suggestion-id': [
            {
                'text': 1234567,
                'length': 1,
                'options': [
                    {
                        'text': 1234568,
                        'freq': 1,
                        'score': 1.0
                    }
                ],
                'offset': 0
            }
        ],
    }
    

Testing

python setup.py test

Changelog

1.8.1:
1.8.0:
1.7.0:
1.6.2:
1.6.1:
  • Fix Twine README.md
1.6.0:
1.5.1:
1.5.0:
1.4.0
1.3.7
1.3.6
1.3.5
1.3.4
1.3.3
1.3.2
1.3.1
  • elasticmock: Allow the same arguments to the mock that elasticsearch.Elasticsearch allows (Thanks @mattbreeden)
1.3.0:
1.2.0:
  • FakeElasticSearch: Mocked suggest method
1.1.1:
  • elasticmock: Changing the cleanup older FakeElasticSearch's instances order
  • FakeElasticSearch.index: Changing the method signature to correctly overrides the Elasticsearch.index method
1.1.0:
  • FakeElasticSearch: Mocked delete method
1.0.1:
  • setup.py: Fixed GitHub link
1.0.0:
  • elasticmock: Created @elasticmock decorator
  • FakeElasticSearch: Mocked exists, get, get_source, index, info, search and ping method

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