10-truncate_a_string.js

/*Truncate a string (first argument) if it is longer than the given maximum string length (second argument). Return the truncated string with a '...' ending. Note that the three dots at the end add to the string length.*/

function truncate(str, num) {
  if (str.length <= num) {
    return str
  } else {
    return str.substring(0, num) + "..."
  }
}

console.log(truncate("A-tisket a-tasket A green and yellow basket", 11))

//Passing Tests

var chai = require("chai")
var expect = chai.expect
var assert = require("assert")

/* expect(truncate("A-tisket a-tasket A green and yellow basket", 11)).to.eqls(
  "A-tisket...",
) */
/* assert(
  truncate(
    "A-tisket a-tasket A green and yellow basket",
    "A-tisket a-tasket A green and yellow basket".length,
  ) === "A-tisket a-tasket A green and yellow basket",
  "should not truncate if firsst argument string is = length",
) */
/* assert.strictEqual(
  truncate(
    "A-tisket a-tasket A green and yellow basket",
    "A-tisket a-tasket A green and yellow basket".length + 1,
  ),
  "A-tisket a-tasket A green and yellow basket",
  "should not truncate if first argument string is < length",
) */