Question

I would like to test if an instance variable lies in a range of numbers:

#part of the tested class
class Item
  def initialize(value = 70 + rand(30))
    @value = value
  end

I tried the assertions in minitest assertions list but they didn’t work. I solved the problem by using assert_in_delta as shown below:

#test_value.rb
class ValueTestCase < Test::Unit::TestCase
  def test_if_value_in_range
    item = Item.new
    assert_in_delta(85, item.value, 15)
  end
end

But would like to know if there is a formal assertion for this.

Answer 1

Another way would be to use Range#include?:

assert_includes 70..100, p.value