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Return Function Tests

Students writes a function named add_five() that takes an integer as a parameter and returns 5 plus the parameter value. 
Grading Tests:
require 'rspec'
require 'stringio'
require '/usercode/exampleb'
​
RSpec.describe "CodingRoomsUnitTests" do
​
    describe "Run add_five() with parameter 5" do
        it "expect the function to return 10" do
            expect(add_five(5)).to eq(10)
        end
    end
​
    describe "Run add_five() with parameter 0" do
        it "expect the function to return 5" do
            expect(add_five(0)).to eq(5)
        end
    end
​
    describe "Run add_five() with parameter 6" do
        it "expect the function to return 11" do
            expect(add_five(6)).to eq(11)
        end
    end
​
end
Sample Solution:
example.rb
def add_five(number)
    number += 5
    return number
end
​
puts add_five(5)rub

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