text: 'use strict'
  
  /*
   * Create a `capitalize` function that takes a string
   * and transforms it to upper case only for the first letter,
   * and in lowercase for the rest of the string
   *
   */
  function capitalize(someString) {
    return someString.slice(0, 1).toUpperCase() + someString.slice(1).toLowerCase();
  }
  
  
  
  //* Begin of tests
  const assert = require('assert')
  
  assert.strictEqual(typeof capitalize, "function")
  assert.strictEqual(capitalize('str'), 'Str')
  assert.strictEqual(capitalize('qsdqsdqsd'), 'Qsdqsdqsd')
  assert.strictEqual(capitalize('STR'), 'Str')
  assert.strictEqual(capitalize('zapZAP'), 'Zapzap')
  // End of tests */
  