Javasript Test cozumlerinde Yardimci olurmusunuz

What's the unit test behavior on command "mocha test.js" (Mocha/Chai/Sinon ES6)?

test.js:

const should = require('chai').should();

const sinon = require('sinon');

a=()=>{

     return false;

}

b=()=>{

return true;

}

it('should work', ()=>{

     sinon.spy(global, 'a');

     sinon.stub(global, 'b').returns(false);

     a().should.equal(false);

     b().should.not.equal(true);

     a();

     a.callCount.should.equal(2);

     b.callCount.should.equal(1);

});

• A. 1) should work
  

                1 failing

                Because a() returns undefined not false

• B.  should work
  

                 1 passing

• C. 1) should work
  

                 1 failing

                 Because "a" has not the expected callCount

• D. 1) should work
  

                1 failing

                 Because b() does not return the expected value

Arkadaslar Bu sorunun Yanitini bilen varmi?