takahser / web3-jest

Simple test of web3.js using the Jest testing framework

Simple Jest test of web3 1.0

Jest is a JavaScript testing framework developed by Facebook.

web3 is a JavaScript client for Ethereum.

Installation

To install

git clone https://github.com/naddison36/web3-jest.git
cd web3-jest
npm install

Running the test

To run the Jest test run

npm test

The simple Jest test in the web3.test.js file is

    const Web3 = require("web3");
    
    test("Web3 version", function()
    {
        expect(Web3.version).toEqual("1.0.0-beta.23");
    });

The error

The following is the error I get using a Mac OS X 10.12.6, node v6.10.3 and npm 3.10.10

/Users/nick/.nvm/versions/node/v6.10.3/bin/node /Users/nick/Documents/workspaces/web3-jest/node_modules/jest/bin/jest --config "{\"testRegex\":\"(/__tests__/.*|(\\.|/)(test|spec))\\.(jsx?|tsx?)$\",\"moduleFileExtensions\":[\"ts\",\"tsx\",\"js\",\"jsx\",\"json\"],\"rootDir\":\"/Users/nick/Documents/workspaces/web3-jest\",\"transformIgnorePatterns\":[\"/node_modules/\",\"^/Applications/WebStorm.app/Contents/plugins/JavaScriptLanguage/helpers\"],\"unmockedModulePathPatterns\":[\"^/Applications/WebStorm.app/Contents/plugins/JavaScriptLanguage/helpers\"]}" --colors --setupTestFrameworkScriptFile /Applications/WebStorm.app/Contents/plugins/JavaScriptLanguage/helpers/jest-intellij/lib/jest-intellij-jasmine.js
 FAIL  ./web3.test.js
  ● Test suite failed to run

    Cannot find module './build/Release/scrypt' from 'index.js'
      
      at Resolver.resolveModule (node_modules/jest-resolve/build/index.js:191:17)

Test Suites: 1 failed, 1 total
Tests:       0 total
Snapshots:   0 total
Time:        2.04s
Ran all test suites.

To test web3 using node rather than Jest run

node testWeb3.js