Debugging with Rspec

1_hello_world.rb

### SETUP
require 'rspec'

### LOGIC (fix me)
def who (word)
  word
end

def hello(who)
  "hello #{who}!"
end

### TEST CODE (don't touch me)

describe '#hello' do
  it 'returns "hello world!" when "world" is passed in' do
    result = hello('world')
    expect(result).to eq('hello world!')
  end
end

2_arrays.rb

### SETUP
require 'rspec'

### LOGIC (fix me)

# Returns the average of all the numbers in the array
def average(numbers)
  return if numbers.nil?
  return if numbers.size == 0
  sum = 0

  numbers.each do |n|
    sum += n.to_f
  end
  sum / numbers.size
end

### TEST CODE (don't touch me)

describe '#average' do
  it 'returns nil for empty array' do
    result = average([])
    expect(result).to be_nil
  end
  it 'returns nil when nil is passed in' do
    result = average(nil)
    expect(result).to be_nil
  end
  it 'returns 4 for 3,4,5' do
    result = average([3, 4, 5])
    expect(result).to eq(4)
  end
  it 'can handle numbers represented as strings' do
    result = average([10, '20', 30])
    expect(result).to eq(20)
  end
  it 'can handle floats' do
    result = average([1.0, 1.5, 2.0])
    expect(result).to eq(1.5)
  end
end