Exercise.io Elixir Exercirse

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Bob

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

He answers 'Whatever.' to anything else.

Instructions

Run the test file, and fix each of the errors in turn. When you get the first test to pass, go to the first pending or skipped test, and make that pass as well. When all of the tests are passing, feel free to submit.

Remember that passing code is just the first step. The goal is to work towards a solution that is as readable and expressive as you can make it.

Please make your solution as general as possible. Good code doesn't just pass the test suite, it works with any input that fits the specification.

Have fun!

Source

Inspired by the 'Deaf Grandma' exercise in Chris Pine's Learn to Program tutorial. view source

bob.exs

defmodule Teenager do
  def hey(input) do
    case input do
      " " ->
        "Fine. Be that way!"
      _ when "!" in input -> 
        "Woah, chill out!"
      _ when "?" in input -> 
        "Sure."
      _ when not is_string(input) -> 
        "Whatever."
      _ -> "Whatever."
    end
  end
end

bob_test.exs

if System.get_env("EXERCISM_TEST_EXAMPLES") do
  Code.load_file("example.exs")
else
  Code.load_file("bob.exs")
end

ExUnit.start

defmodule TeenagerTest do
  use ExUnit.Case, async: true

  test "stating something" do
    assert Teenager.hey("Tom-ay-to, tom-aaaah-to.") == "Whatever."
  end

  test "shouting" do
    assert Teenager.hey("WATCH OUT!") == "Woah, chill out!"
  end

  test "asking a question" do
    assert Teenager.hey("Does this cryogenic chamber make me look fat?") == "Sure."
  end

  test "talking forcefully" do
    assert Teenager.hey("Let's go make out behind the gym!") == "Whatever."
  end

  test "talking in capitals" do
    assert Teenager.hey("This Isn't Shouting!") == "Whatever."
  end

  test "shouting numbers" do
    assert Teenager.hey("1, 2, 3 GO!") == "Woah, chill out!"
  end

  test "shouting with special characters" do
    assert Teenager.hey("ZOMG THE %^*@#$(*^ ZOMBIES ARE COMING!!11!!1!") == "Woah, chill out!"
  end

  test "shouting with no exclamation mark" do
    assert Teenager.hey("I HATE YOU") == "Woah, chill out!"
  end

  test "statement containing question mark" do
    assert Teenager.hey("Ending with ? means a question.") == "Whatever."
  end

  test "silence" do
    assert Teenager.hey("") == "Fine. Be that way!"
  end

  test "prolonged silence" do
    assert Teenager.hey("  ") == "Fine. Be that way!"
  end

  test "only numbers" do
    assert Teenager.hey("1, 2, 3") == "Whatever."
  end

  test "question with numbers" do
    assert Teenager.hey("4?") == "Sure."
  end

  test "shouting in Russian" do
    # Hopefully this is Russian for "get out"
    assert Teenager.hey("УХОДИТЬ") == "Woah, chill out!"
  end
end