text: /* global describe, context,it */
  /* eslint-disable no-unused-expressions */
  
  import { expect } from 'chai';
  import * as Stats from './index';
  
  context('statistics function tests', () => {
      describe('#sum', () => {
          it('should return sum for 1D array', () => {
              expect(Stats.sum([10, 12, 17])).to.equal(39);
          });
      });
  
      describe('#avg', () => {
          it('should return average for 1D Array', () => {
              expect(Stats.avg([10, 12, 17])).to.equal(39 / 3);
          });
      });
  
      describe('#min', () => {
          it('should return min for 1D Array', () => {
              expect(Stats.min([10, 12, 17])).to.equal(10);
          });
      });
  
      describe('#max', () => {
          it('should return max for 1D Array', () => {
              expect(Stats.max([10, 12, 17])).to.equal(17);
          });
      });
  
      describe('#first', () => {
          it('should return first for 1D Array', () => {
              expect(Stats.first([10, 12, 17])).to.equal(10);
          });
      });
  
      describe('#last', () => {
          it('should return last for 1D Array', () => {
              expect(Stats.last([10, 12, 17])).to.equal(17);
          });
      });
  
      describe('#count', () => {
          it('should return count for 1D Array', () => {
              expect(Stats.count([10, 12, 17])).to.equal(3);
          });
      });
  
      describe('#sd', () => {
          it('should return standard deviation for 1D Array', () => {
              expect(Math.ceil(Stats.sd([10, 12, 17]))).to.equal(Math.ceil(2.9));
          });
      });
  });
  