AllStarCodeOrg / TA_JavaScriptAssessment

JavaScript Assessment - Teaching Assistant

The All Star Code Teaching Assistant JavaScript Assessment consists of 4 tasks, to be completed and turned in to [e-mail] as a GitHub gist.

IT IS NOT NECESSARY PASS ALL TEST SPECS TO GET HIRED. JUST DO YOUR BEST! 😄

Steps to Tackling the Assessment

1. Clone or download this repo.

2. Navigate into the repo from command line and before doing anything else, run the command npm install.

   • If any error occurs, run npm init. Hit enter for all the questions and enter npm install again.
   • If command is not found for npm install or npm init, install node.js here: https://nodejs.org/en/download/ and repeat step #2.

3. Follow the prompts for each task and do your best!

Notes

• The tests folder contains test files in which your functions will be tested with. Feel free to look at the tests, but DO NOT edit them. These exact tests will be used to test your answers when you submit your work.
• Info on testing your work with the provided test specs is included at the end of the document.

---

Task #1 - Define a Pokemon Class

• Write your code in pokemon.js in the cloned or downloaded folder.
• Construct and initialize a Pokemon object by passing in 5 arguments that corresponds to the following 5 properties in order: .name, .attack, .defense, .health, and .type.
  • Example:

     const charmander = new Pokemon("charmander", 12, 8, 30, "fire");
     console.log(charmander.name);    // charmander
     console.log(charmander.attack);  // 12
     console.log(charmander.defense); // 8
     console.log(charmander.health);  // 30
     console.log(charmander.type);    // fire

  • Data type validation is not needed. You can assume that the following property: type pairing is always used:
    • .name: string
    • .attack: number
    • .defense: number
    • .health: number
    • .type: string

Task #2 - takeDamage() Method

• Implement a takeDamage() method for the Pokemon class which takes a number as an argument and reduces the .health of the Pokemon by that number.
  • Note: If .health goes below 0, it should be set to 0 instead.
  • Example:

     console.log(charmander.health);  // 30
    
     charmander.takeDamage(5);
     console.log(charmander.health);  // 25
    
     charmander.takeDamage(2000);
     console.log(charmander.health);  // 0

Task #3 - attackOpponent() Method

• Implement an attackOpponent() method for the Pokemon class which takes a Pokemon object as an argument (the opponent being attacked). This method should call the takeDamage() method of the opposing Pokemon and provide the appropriate damage as an argument.
  DAMAGE = CURRENT_POKEMON_ATTACK - OPPONENT_POKEMON_DEFENSE.
  • Example:

     const charmander = new Pokemon("charmander", 12, 8, 30, "fire");
     const bulbasaur = new Pokemon("bulbasaur", 7, 9, 35, "grass/poison");
    
     console.log(charmander.attack);  // 12
     console.log(bulbasaur.defense);  // 9
     // 12 attack - 9 defense = 3 damage
    
     console.log(bulbasaur.health);  // 35
     charmander.attackOpponent(bulbasaur);  // charmander attacks bulbasaur
     console.log(bulbasaur.health);  // 32

  • Attacking a Pokemon should do 1 damage at the very least. Consider cases in which the Pokemon being attacked has a higher .defense than the .attack of the attacking Pokemon.

Task #4 - display() Method

• Implement a display() method for the Pokemon class which takes no arguments and returns a string with the Pokemon's .name in all caps, .type in all caps and in parenthesis, and .health with a forward-slash, " / ", followed by the .health the Pokemon was initialized with.
  • Example:

     const pikachu = new Pokemon("pikachu", 9, 10, 25, "electric");
     pikachu.display();  // PIKACHU (ELECTRIC) 25/25
    
     pikachu.health = 12;
     pikachu.display();  // PIKACHU (ELECTRIC) 12/25

---

TESTING YOUR POKEMON CLASS

- The tests are setup with commands to test your answers for each individual task. This will only work properly if there are: - No errors for `npm install` command - No modifications to any files in the `tests` folder - No modifications to any scripts commands in the `package.json` file - No modifications to `module.exports` at the end of `pokemon.js`

• Use the following command to test your work in the cloned or downloaded folder:
  • npm run test to test your Pokemon class and methods.

The output for a test:

Test Suites: 1 failed, 1 total
Tests:       7 failed, 1 passed, 8 total
Snapshots:   0 total
Time:        1.781s
Ran all test suites matching /tests\\pokemon.test.js/i.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! teachingFellows@1.0.0 test_string: `jest tests/pokemon.test.js`
npm ERR! Exit status 1

Your output may look different based on the specific task and the number of tests passed/failed.

Take note of these 2 lines:

Test Suites: 1 failed, 1 total
Tests:       7 failed, 1 passed, 8 total

The output above indicates that the function only passed 1 out 8 tests 😢
You can scroll up the console to diagnose the errors by comparing the expected outputs and what your function returned.

For example:

    Expected: "string"
    Received: "undefined"

      11 |     it('should properly initialize all 5 traits', () => {
      12 |         const charmander = new Pokemon('Charmander', 100, 110, 130, 'fire');
    > 13 |         expect(typeof charmander.name).toBe('string');
         |                                        ^

The test failed because the program expected the output of typeof charmander.name to be 'string', but received the output undefined instead.

Your solutions will be tested with these exact test files. Your goal is to have your functions pass as many tests as possible.
REMEMBER: IT IS NOT NECESSARY TO PASS ALL TESTS TO BE HIRED. PLEASE SUBMIT WHATEVER YOU MANAGE TO COMPLETE!