20150516_bob.exs

##################
##### My Codes
##################

defmodule Teenager do
  def hey(input) do
    cond do
      String.upcase(input) == input &&
       ( Regex.match?(~r/[A-Z]+[^\?]\z/, input) || Regex.match?(~r/[\w]+[^\?]\z/u, input)) ->
        "Whoa, chill out!"
      Regex.match?(~r/\?\z/, input) ->
        "Sure."
      Regex.match?(~r/\A\s+\z/, input) || input == "" ->
        "Fine. Be that way!"  
      true ->
        "Whatever."
    end
  end
end


##################
##### Test Codes
##################

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!") == "Whoa, 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!") == "Whoa, chill out!"
  end

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

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