PatrickMcSweeny's solution to Bob on the JavaScript track

Instructions

Test suite

Solution

Note:

This exercise has changed since this solution was written.

Bob is a lackadaisical teenager. In conversation, his responses are very limited.

Bob answers 'Sure.' if you ask him a question.

He answers 'Whoa, chill out!' if you yell at him.

He retorts 'Calm down, I know what I'm doing!' if you yell a question at him.

He says 'Fine. Be that way!' if you address him without actually saying anything.

He answers 'Whatever.' to anything else.

Setup

Go through the setup instructions for Javascript to install the necessary dependencies:

https://exercism.io/tracks/javascript/installation

Requirements

Install assignment dependencies:

$ npm install

Making the test suite pass

Execute the tests with:

$ npm test

In the test suites all tests but the first have been skipped.

Once you get a test passing, you can enable the next one by changing xtest to test.

Source

Inspired by the 'Deaf Grandma' exercise in Chris Pine's Learn to Program tutorial. http://pine.fm/LearnToProgram/?Chapter=06

Submitting Incomplete Solutions

It's possible to submit an incomplete solution so you can see how others have completed the exercise.

bob.spec.js

import { hey } from './bob';

describe('Bob', () => {
  test('stating something', () => {
    const result = hey('Tom-ay-to, tom-aaaah-to.');
    expect(result).toEqual('Whatever.');
  });

  xtest('shouting', () => {
    const result = hey('WATCH OUT!');
    expect(result).toEqual('Whoa, chill out!');
  });

  xtest('shouting gibberish', () => {
    const result = hey('FCECDFCAAB');
    expect(result).toEqual('Whoa, chill out!');
  });

  xtest('asking a question', () => {
    const result = hey('Does this cryogenic chamber make me look fat?');
    expect(result).toEqual('Sure.');
  });

  xtest('asking a numeric question', () => {
    const result = hey('You are, what, like 15?');
    expect(result).toEqual('Sure.');
  });

  xtest('asking gibberish', () => {
    const result = hey('fffbbcbeab?');
    expect(result).toEqual('Sure.');
  });

  xtest('talking forcefully', () => {
    const result = hey("Let's go make out behind the gym!");
    expect(result).toEqual('Whatever.');
  });

  xtest('using acronyms in regular speech', () => {
    const result = hey("It's OK if you don't want to go to the DMV.");
    expect(result).toEqual('Whatever.');
  });

  xtest('forceful question', () => {
    const result = hey('WHAT THE HELL WERE YOU THINKING?');
    expect(result).toEqual('Calm down, I know what I\'m doing!');
  });

  xtest('shouting numbers', () => {
    const result = hey('1, 2, 3 GO!');
    expect(result).toEqual('Whoa, chill out!');
  });

  xtest('only numbers', () => {
    const result = hey('1, 2, 3');
    expect(result).toEqual('Whatever.');
  });

  xtest('question with only numbers', () => {
    const result = hey('4?');
    expect(result).toEqual('Sure.');
  });

  xtest('shouting with special characters', () => {
    const result = hey('ZOMG THE %^*@#$(*^ ZOMBIES ARE COMING!!11!!1!');
    expect(result).toEqual('Whoa, chill out!');
  });

  xtest('shouting with no exclamation mark', () => {
    const result = hey('I HATE YOU');
    expect(result).toEqual('Whoa, chill out!');
  });

  xtest('statement containing question mark', () => {
    const result = hey('Ending with a ? means a question.');
    expect(result).toEqual('Whatever.');
  });

  xtest('non-letters with question', () => {
    const result = hey(':) ?');
    expect(result).toEqual('Sure.');
  });

  xtest('prattling on', () => {
    const result = hey('Wait! Hang on. Are you going to be OK?');
    expect(result).toEqual('Sure.');
  });

  xtest('silence', () => {
    const result = hey('');
    expect(result).toEqual('Fine. Be that way!');
  });

  xtest('prolonged silence', () => {
    const result = hey('          ');
    expect(result).toEqual('Fine. Be that way!');
  });

  xtest('alternate silence', () => {
    const result = hey('\t\t\t\t\t\t\t\t\t\t');
    expect(result).toEqual('Fine. Be that way!');
  });

  xtest('multiple line question', () => {
    const result = hey('\nDoes this cryogenic chamber make me look fat?\nno');
    expect(result).toEqual('Whatever.');
  });

  xtest('starting with whitespace', () => {
    const result = hey('         hmmmmmmm...');
    expect(result).toEqual('Whatever.');
  });

  xtest('ending with whitespace', () => {
    const result = hey('Okay if like my  spacebar  quite a bit?   ');
    expect(result).toEqual('Sure.');
  });

  xtest('other whitespace', () => {
    const result = hey('\n\r \t');
    expect(result).toEqual('Fine. Be that way!');
  });

  xtest('non-question ending with whitespace', () => {
    const result = hey('This is a statement ending with whitespace      ');
    expect(result).toEqual('Whatever.');
  });
});

const isSilence = message => message === "";

const isShouting = message =>
  message === message.toUpperCase() && message !== message.toLowerCase();

const isQuestion = message => message.endsWith("?");

export const hey = message => {
  message = message.trim();

  if (isSilence(message)) {
    return "Fine. Be that way!";
  } else if (isShouting(message)) {
    if (isQuestion(message)) {
      return "Calm down, I know what I'm doing!";
    } else {
      return "Whoa, chill out!";
    }
  } else if (isQuestion(message)) {
    return "Sure.";
  } else {
    return "Whatever.";
  }
};

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PatrickMcSweeny's solution

to Bob in the JavaScript Track