nodejs unit test sinon

nodejs unit test sinon.md

stub field

This works for me with Sinon.JS v4.1.2:

myObject = {hello: 'hello'}
sandbox = sinon.createSandbox()
sandbox.stub(myObject, 'hello').value('Sinon')
myObject.hello // "Sinon"
sandbox.restore()
myObject.hello // "hello"

https://stackoverflow.com/questions/47424195/sinon-not-stubbing-property-value-of-object

stub require

// in your testfile
var innerLib  = require('./path/to/innerLib');
var underTest = require('./path/to/underTest');
var sinon     = require('sinon');

describe("underTest", function() {
  it("does something", function() {
    sinon.stub(innerLib, 'toCrazyCrap').callsFake(function() {
      // whatever you would like innerLib.toCrazyCrap to do under test
    });

    underTest();

    sinon.assert.calledOnce(innerLib.toCrazyCrap); // sinon assertion

    innerLib.toCrazyCrap.restore(); // restore original functionality
  });
});

https://stackoverflow.com/questions/5747035/how-to-unit-test-a-node-js-module-that-requires-other-modules-and-how-to-mock-th