Ruby unit test sample 1

x = "test"
y = " string"

z = x + y

puts"#{x} + #{y} = #{z}"


require 'test/unit'

class TestInterpolation < Test::Unit::TestCase
  def test_basic
    assert_equal(z = "test string", z ="test string")
  end
end

##
# Okay you need to think more carefully about what you are doing here.
#
# The expression
#
#   z = 'test string' 
#
# will assign 'test string' to z, then evaluate to 'test string'
#
# What that means is that you are, effectively, setting z to test string, but
# also comparing something to itself which, in this context, must always be true
#
# So

  assert_equal 'test string', z

or, if you are just testing that interpolation isn't broken somehow

  assert_equal 'test string', "#{"test" + " string"}"

would work just as well.