Basic Assert in javascript ES5 (syntax) for Appscript

README.md

Example:

Assert.true(true,'This is truthful');
Assert.true(false,'This is truthful');
Assert.false(false,'This is a lie');
Assert.false(true,'This is a lie');
Assert.equals(typeof 'hola', 'string', 'This variable contains a message');
Assert.equals(typeof 3, 'string', 'This variable contains a message');

Result:

🍏 － This is truthful
🍎 － This is truthful
    condition is "false"
🍏 － This is a lie
🍎 － This is a lie
    condition is "false"
🍏 － This variable contains a message
🍎 － This variable contains a message
    provided "number" not equals expected "string"

assert.js

/**
* Basic class
*/
function Assert() {}

/**
* Compose the string to see if the test succeded or failed
*
* @return {string|Error} Message with the corresponding 
*/
Assert.basicCheck = (condition,message)=>(condition ? '🍏' : '🍎') + ' － ' + message;

/**
* Print the message in the correct way
*/
Assert.print = function(condition, message, error) {
  var res = this.basicCheck(condition, message);
  console.log(res + (condition? '' :  '\n    ' + error));
}

/**
* Checks if the condition is true, prints and returns true if so
*
* @param {boolean} condition to be tested
* @param {string} message describe the assert
* @return {boolean} wheter the assert succeded or failed
*/
Assert.true = function(condition, message) {
  var error = 'condition doesn\'t match';
  this.print(condition, message, error)
  return condition;
}

/**
* Checks if the condition is false, prints and returns true if so
*
* @param {boolean} condition to be tested
* @param {string} message describe the assert
* @return {boolean} wheter the assert succeded or failed
*/
Assert.false = function(condition, message) {
  return this.true(!condition, message);
}

/**
* Assert function to implement a couple of tests
*
* @param {Object} first object to be tested
* @param {Object} second object to be tested
* @return {boolean} wheter the assert succeded or failed
*/
Assert.equals = function(first, second, message) {
  var condition = first == second;
  var error = 'provided "' + first + '" not equals expected "' + second + '"';
  this.print(condition, message, error);
  return condition;
}

Assert.true(true, 'This is truthful');
Assert.true(false, 'This is truthful');
Assert.false(false, 'This is a lie');
Assert.false(true, 'This is a lie');
Assert.equals(typeof 'hola', 'string', 'This variable contains a message');
Assert.equals(typeof 3, 'string', 'This variable contains a message');