this is what i want all ruby challenges to eventually look like, with rspec tests

index.rb

# to solve the code below you need to
# => gem install rspec

# then to execute this code run
# => rspec index.rb --format doc

# 1.
def sum(num1, num2)
  # your code here
end 

describe "#sum" do
  it do 
    result = sum(2, 3)
    expect(result).to eq(5)
  end 
end

# 2.
def say_hello 
  # your code here
end 

describe "#say_hello" do
  it do 
    expect(say_hello).to eq("hello")
  end 
end

# 3. 
def abc_123(str) 
  # your code here
end 

describe "#abc_123" do
  it do 
    expect(abc_123("abc")).to eq("ABC123")
  end 
end

# 4.
def separate_numbers(arr)
  # your code here
end 

describe "#separate_numbers" do 
  it do 
    result = [[1,2,3],[4,5,6]]
    expect(separate_numbers([1,2,3,4,5,6])).to eq(result)
  end 
end