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testing react-native app with jest, undefined symbol: SSL_library_init

See original GitHub issue

Goals

I wanted to test my react native application with jest But i get this error


> proj@0.0.1 test /home/castix/proj
> jest

 FAIL  __tests__/index.android.js
  ● Test suite failed to run

    /home/castix/proj/node_modules/realm/compiled/node-v57_linux_x64/realm.node: undefined symbol: SSL_library_init

      at Runtime.requireModule (node_modules/jest-runtime/build/index.js:372:31)
      at Object.<anonymous> (node_modules/realm/lib/index.js:102:28)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        1.796s
Ran all test suites.
Jest did not exit one second after the test run has completed.

This usually means that there are asynchronous operations that weren't stopped in your tests. Consider running Jest with `--detectOpenHandles` to troubleshoot this issue.
^C

undefined symbol: SSL_library_init Is there something I need to mock with jest or is it an issue with the linking of libssl The application seems to work fine, but I can’t set up unit tests

Code Sample

jest config in package.json

    "snapshotSerializers": [
      "enzyme-to-json/serializer"
    ],
    "preset": "react-native",
    "verbose": true,
    "transformIgnorePatterns": [
      "node_modules/(?!react-native|@shoutem/theme|@shoutem/animation|@shoutem/ui|pouchdb-react-native|pouchdb-adapter-asyncstorage|react-native-fetch-blob|realm)"
    ],
    "setupFiles": [
      "./jest_setup.js"
    ]
  }

jest_setup.js

import { NativeModules } from "react-native";

NativeModules.BlobModule = {
  ...NativeModules.BlobModule,
  addNetworkingHandler: jest.fn()
};

and __tests__/index.android.js

import React from 'react';
// Note: test renderer must be required after react-native.
import renderer from 'react-test-renderer';

import Index from '../index.android.js';