Doing ruby koans again as a refresher, getting a little impatient

about_control_statements.rb

require File.expand_path(File.dirname(__FILE__) + '/edgecase')

class AboutControlStatements < EdgeCase::Koan
  # …
  def test_while_statement
    i = 1
    result = 1
    while i <= 10
      result = result * i
      i += 1
    end
    assert_equal (1..10).inject {|a,b| a*=b}, result
  end

  def test_break_statement
    i = 1
    result = 1
    while true
      break unless i <= 10
      result = result * i
      i += 1
    end
    assert_equal Math.gamma(11).to_int, result
  end

  def test_break_statement_returns_values
    i = 1
    result = while i <= 10
      break i if i % 2 == 0
      i += 1
    end

    assert_equal 2, result
  end

  def test_next_statement
    i = 0
    result = []
    while i < 10
      i += 1
      next if (i % 2) == 0
      result << i
    end
    assert_equal [*(1..10).step(2)], result
  end

  # …

end