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openmock

Python OpenSearch Mock for test purposes


Maintainers
1

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Openmock

Mock/fake of opensearch library, allows you to mock opensearch-py

Fork of Python Elasticsearch(TM) Mock. Sometimes the developers who work with elasticsearch (TM), don't really have any input in choice of host and need to get work done.

Libraries.io dependency status for latest release Downloads

Installation

pip install openmock

Usage

To use Openmock, decorate your test method with @openmock decorator:

from unittest import TestCase

from openmock import openmock


class TestClass(TestCase):

    @openmock
    def test_should_return_something_from_opensearch(self):
        self.assertIsNotNone(some_function_that_uses_opensearch())

Custom Behaviours

You can also force the behaviour of the OpenSearch instance by importing the openmock.behaviour module:

from unittest import TestCase

from openmock 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 OpenSearch 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 opensearchpy

class FooService:

    def __init__(self):
        self.es = opensearchpy.OpenSearch(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')

Then you should be able to test this class by mocking OpenSearch using the following test class:

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

class FooServiceTest(TestCase):

    @openmock
    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 OpenSearch
        id = service.create(index, expected_document)
        self.assertIsNotNone(id)

        # Retrive document from OpenSearch
        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 OpenSearch.suggest response. Attention: 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

Preferred for testing one version of python.

pytest test

Won't catch pytest tests.

python -m unittest

We are trying to support a full matrix of openmock versions and python versions 3.6+. This is slow.

tox

Changelog

2.1.0:
  • Update function (Thanks!)
  • tox runs against full matrix
  • Range queries (Thanks!)
2.0.0:
  • Fork from elasticmock

License

MIT with normalize_host.py being Apache 2 from Elasticsearch.

Keywords

FAQs


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