Kumite

const chai = require("chai");
const assert = chai.assert;
chai.config.truncateThreshold = 0;

describe('+', () => {
  for(let i = 0; i < 10; i++) {
    const a = Math.random() * 100, b = Math.random() * 100;
    const exp = a + b;
    it(`${a} + ${b} = ${exp}`, () => {
      assert.deepEqual(calculator(a, b, '+'), exp)
    });
  }
});

describe('-', () => {
  for(let i = 0; i < 10; i++) {
    const a = Math.random() * 100, b = Math.random() * 100;
    const exp = a - b;
    it(`${a} - ${b} = ${exp}`, () => {
      assert.deepEqual(calculator(a, b, '-'), exp)
    });
  }
});

describe('*', () => {
  for(let i = 0; i < 10; i++) {
    const a = Math.random() * 100, b = Math.random() * 100;
    const exp = a * b;
    it(`${a} * ${b} = ${exp}`, () => {
      assert.deepEqual(calculator(a, b, '*'), exp)
    });
  }
});

describe('/', () => {
  for(let i = 0; i < 10; i++) {
    const a = Math.random() * 100, b = Math.random() * 100;
    const exp = a / b;
    it(`${a} / ${b} = ${exp}`, () => {
      assert.deepEqual(calculator(a, b, '/'), exp)
    });
  }
});