=begin
  This file supports a test-driven approach
  to programming. It was set up first, before
  actually programming the fact method. It provides
  a type of template for doing test-driven programming
  for any problem.
=end

require 'test/unit'		#this never changes
require 'iFactorial0.rb'	#file where fact method is found

class FactorialTest < Test::Unit::TestCase	#FactorialTest is name of your choosing

  def test_fact_0	#test_fact_0 is name of your choosing
    s = fact(0)		#fact is method we are testing with parameter 0
    assert_equal(1, s)	#we expect the return value to be 1, i.e., 0! == 1
  end

  def test_fact_1
    s = fact(1)
    assert_equal(1, s)
  end

  def test_fact_2
    s = fact(2)
    assert_equal(2, s)
  end

  def test_fact_3
    s = fact(3)
    assert_equal(6, s)
  end

  def test_fact_4
    s = fact(4)
    assert_equal(24, s)
  end

#Should we have more test cases? Probably. They would follow same form
#as those above.

end