Kata 8/29 Ruby Spec

describe Array do
  it "maintains a list of values and its size" do
    a = []
    a.size.should == 0

    (1..10).each do |i|
      a << i
      a.size.should == i
    end
  end

  it "has a shorter syntax for specifying values" do
    a = %w{ four score and seven years ago }

    a[1].should == "score"
    a.size.should == 6
  end
end

describe String do
  it "has a convenient syntax for specifying without needing backslashes" do
    s = %Q{ No need to backslash ' or "! }

    s.index('\'').should be > 0
    s.index("\"").should be > 0
    s.should match /' or "/
  end

  it "can do replacement based on string or Regexp" do
    s = "John Blanco is one cool guy."

    s.gsub("cool", "geeky").should match /one geeky guy.\z/
    s.gsub(/o/, "0").should_not match /o/
  end

  it "can calculate successions" do
    "123".succ.should == "124"
    "ABC".next.should == "ABD"
  end
end

describe Regexp do
  it "matches the standard classes" do
    s = "I've got 99 problems and a b**** ain't one."

    s.index(/\d+/).should == 9
    s.index(/\*/).should == 28
    s.index(/z/).should == nil
    s.index(/'/).should == 1
  end

  it "can handle multi-line strings" do
    s = "everytime you drop the bomb\nyou kill the god your child has born"

    s.index(/bomb.you/m).should_not == nil
    (s =~ /bomb.you/m).should_not == nil
    (s =~ /bomb$/m).should_not == nil
    (s =~ /bomb\z/m).should == nil
  end
end