3 replies

Proxyquire with a nested dependency

So I've got a test file and 2 modules.

moduleA has a dependency, moduleB

// moduleA.js
const ModuleB = require('./moduleB');

function functionA() {
  return 20 + ModuleB.functionB();
};

module.exports = { functionA };


// moduleB.js
const functionB = () => {
  return 10;
}

module.exports = { functionB }

// moduleA.js
const ModuleB = require('./moduleB');

function functionA() {
  return 20 + ModuleB.functionB();
};

module.exports = { functionA };


// moduleB.js
const functionB = () => {
  return 10;
}

module.exports = { functionB }

My test file stubs out functionB (returned from moduleB) using proxyquire:

const sinon = require('sinon');
const proxyquire = require('proxyquire');

describe('Unit Tests', function() {
  it('should work', () => {
    const mockedFn = sinon.stub();
    mockedFn.returns(30);

    const copyModuleA = proxyquire('./moduleA', {
      './moduleB': {
        functionB: mockedFn
      }
    });

    console.log(copyModuleA.functionA());
  })
});

const sinon = require('sinon');
const proxyquire = require('proxyquire');

describe('Unit Tests', function() {
  it('should work', () => {
    const mockedFn = sinon.stub();
    mockedFn.returns(30);

    const copyModuleA = proxyquire('./moduleA', {
      './moduleB': {
        functionB: mockedFn
      }
    });

    console.log(copyModuleA.functionA());
  })
});

So it outputs 50 (stubbed functionB 30 + functionA 20)

Now I'm trying to take this example into my code:

moduleA in this case is a file called validation.js. It is dependent on moduleB, in this case a sequelize model, Person.

validation.js exports module.exports = { validateLogin };, a function that calls validate, which returns a function that uses Person.findOne()

So in my mind, as with the simple example, I need to create a stub, point to the validation module in proxyquire, and reference the dependency and its findOne function. Like this:

KP-C

Kevin Powell - Community•4y ago•

3 replies

JWode

Proxyquire with a nested dependency

So I've got a test file and 2 modules.

moduleA has a dependency, moduleB

// moduleA.js
const ModuleB = require('./moduleB');

function functionA() {
  return 20 + ModuleB.functionB();
};

module.exports = { functionA };


// moduleB.js
const functionB = () => {
  return 10;
}

module.exports = { functionB }

// moduleA.js
const ModuleB = require('./moduleB');

function functionA() {
  return 20 + ModuleB.functionB();
};

module.exports = { functionA };


// moduleB.js
const functionB = () => {
  return 10;
}

module.exports = { functionB }

My test file stubs out functionB (returned from moduleB) using proxyquire:

const sinon = require('sinon');
const proxyquire = require('proxyquire');

describe('Unit Tests', function() {
  it('should work', () => {
    const mockedFn = sinon.stub();
    mockedFn.returns(30);

    const copyModuleA = proxyquire('./moduleA', {
      './moduleB': {
        functionB: mockedFn
      }
    });

    console.log(copyModuleA.functionA());
  })
});

const sinon = require('sinon');
const proxyquire = require('proxyquire');

describe('Unit Tests', function() {
  it('should work', () => {
    const mockedFn = sinon.stub();
    mockedFn.returns(30);

    const copyModuleA = proxyquire('./moduleA', {
      './moduleB': {
        functionB: mockedFn
      }
    });

    console.log(copyModuleA.functionA());
  })
});

Proxyquire with a nested dependency

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