chore(21018):setup TDD for day 1 part 1

Author: developher-net

.eslintrc

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+{
+  "extends": "standard"
+}

2018/day-01/part-1/chronalCalibrator.js

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+const chronalCalibrator = (input) => {
+  let frequency = 0
+  return frequency
+}
+
+module.exports = chronalCalibrator

2018/day-01/part-1/test.js

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+/* eslint-env mocha */
+const expect = require('chai').expect
+const chronalCalibrator = require('./chronalCalibrator')
+
+describe('--- Day 1: Chronal Calibration ---', () => {
+  it('should add a list frequency values', () => {
+    const sequence = '+1, +1, +1'
+    const expected = 3
+    let actual = chronalCalibrator(sequence)
+    expect(actual).to.equal(expected)
+  })
+
+  it('should add a list frequency values', () => {
+    const sequence = '-1, -2, -3'
+    const expected = -6
+    let actual = chronalCalibrator(sequence)
+    expect(actual).to.equal(expected)
+  })
+
+  it('should add a add and subtract a mixed list of frequency values', () => {
+    const sequence = '+1, +1, -2'
+    const expected = 0
+    let actual = chronalCalibrator(sequence)
+    expect(actual).to.equal(expected)
+  })
+})