afaur/ruby-nicefn

# Tests check examples before `Nicefn::Inst` is added and after.
class TestInstance < Test::Unit::TestCase
  def setup
    @klass_property = 'test'
    @person_one = 'John'
    @person_two = 'Jack'
    @expected_stdout = [
      'test', "hello #{@person_one}", "hello #{@person_two}\n"
    ].join("\n")
  end

  # Make sure all instance methods work and output correctly
  def test_inst_valid
    assert_block('Error testing instance public methods') do
      # Store a class property on Inst
      Inst.set_klass_property @klass_property
      
      # Output to stdout the class property value
      Inst.print_klass_property

      # Create two new instances of Inst class
      inst_one = Inst.new
      inst_two = Inst.new

      # Assignable since person is marked as attr_writer
      inst_one.person = @person_one
      inst_two.person = @person_two

      # Will work since method is public
      inst_one.test_priv 'hello'

      # Will work since method is public
      inst_one.test_share 'hello', inst_two

      # If no exceptions were raised then tests pass
      true
    end

    # Ensure program printed correct output to stdout
    assert($stdout.string == @expected_stdout, 'Incorrect program output')
  end

  # Make sure private and protected methods throw when accessed incorrectly
  def test_inst_invalid
    # Will not work since priv was marked as private
    assert_raise { inst_one.priv 'hello' }

    # Will not work since share was marked as protected
    assert_raise { inst_one.share 'hello' }
  end
end