spies_lab_1.js

var assert = chai.assert;

describe('Sinon', function() {
  describe('spies', function() {

    it('should keep count', function() {
      // fill code here
      spy();
      spy();
      spy();

      assert.equal( spy.callCount, 3 );
    });

    it('should spy on existing code', function() {
      var arr = [10, 20, 30];
      // fill code here

      arr.push( 40 );

      assert.isTrue( spy.calledOnce );
    });

    it('should stop spying when done', function() {
      var arr = [10, 20, 30];
      // fill code here

      arr.push( 40 );

      assert.isTrue( spy.calledOnce );
      // fill code here
      arr.push(50);

      assert.isTrue( spy.calledOnce );
    });
  });
});