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Learning about minitest from Steve Klabnik
require 'minitest/autorun'
class TestCashRegister < MiniTest::Unit::TestCase
def setup
@register = CashRegister.new
end
def test_default_is_zero
assert_equal 0, @register.total
end
def test_total_calculation
@register.scan 1
@register.scan 2
assert_equal 3, @register.total
end
def test_total_is_zero_after_clear
@register.scan 1
@register.clear
assert_equal 0, @register.total
end
end
class CashRegister
def initialize
@items = []
end
def total
@items.inject(0, &:+)
end
def scan(item)
@items << item
end
def clear
@items = []
end
end
@aruprakshit

Thanks for sharing this code... :)

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