Go to command prompt and type this:

ruby -e 'require "watir"; puts Watir::IE::VERSION

You should get something like this:
1.5.1.1029

ruby -v

gem list – local or gem list

To Install type:
gem install watir-1[1].5.1.1145.gem Replace watir-1[1].5.1.1145 with the version you wish to install

To Uninstall:
gem uninstall watir

Go to Google and type the following:
site:rubyforge.org "[wtr-general]" javascript
Replace the word 'javascript' with the search term you are searching for

This will click the first link that is found on the page:
ie.link(:text, 'Employees').click

Use this syntax for the second (or more):
ie.link(:text⇒'Employees', index⇒2).click

This is how you can flash all radio buttons in a form.

ie.form(:index, 1).radios.each { |radio| radio.flash }

require 'thread'
require 'watir'

def test_google
ie = Watir::IE.start('http://www.google.com')
ie.text_field(:name, "q").set("pickaxe")
ie.button(:value, "Google Search").click
end

Run the same test three times concurrently in separate browsers

threads = []
3.times do
threads « Thread.new {test_google}
end
threads.each {|x| x.join}

In this example 3 browser connection are open. Are these 3 browser connection open at same time or one after the another.

Per Bret Pettichord: Concurrent threads run in parallel.

 1:#!/usr/bin/ruby -w       
 2:puts "Hello  World!\n"   
 3:                         
 4:# Print a variable       
 5:test = "human events"    
 6:puts test                
 7:                         
 8:# Combining or concatenating two strings  
 9:puts "1: When in the course of " + test   
10:                                          
11:# Printing a value within a String. Interpolation like Perl  
12:puts "2: When in the course of #{test}"  
13:                          
14:# Create a value using a here docment  
15:heredoc = <<END_OF_STRING  
16:-------------------------------  
17:Calling the test value again:  
18:#{test}                     
19:End of the text             
20:-------------------------------   
21:END_OF_STRING                
22:                              
23:puts heredoc                  
24:                              

• The methods that hold the assertions must have names that start with test
• Test::Unit uses reflection to find tests to run, and only methods whose names start with test are eligible
• You can not use "if" and "assert" together (per comment on watir forum)
• To use "Verify" methods:
  1. require 'watir/assertions'
  2. Verify methods will be counted as assertions in the test unit run without exiting out of the calling method.

• The classes that represent test cases must be subclasses of Test::Unit::Testcase
• Nathaniel Talbot, author of Test::Unit says,
  • Test Cases are in files named: tc_xxx
  • Test Suites are in files named: ts_xxx

• #file ts_dbaccess.rb
• require 'test/unit'
• require 'tc_connect'
• require 'tc_query'
• require 'tc_update'
• require 'tc_delete'

unittests directory of your watir installation.
(C:\ruby\lib\ruby\gems\1.8\gems\watir-1.5.1.1145\unittests)

• Modules are a way of grouping together methods, classes and constants.
• Modules are name with an initial Uppercase letter

To get a concise list of _everything_ an array can do, try this from irb: <

any_old_array = [] puts any_old_array.methods

On organizing test cases using test::unit:

A. If you have the following methods in a testcase using test::unit →

def setup
def test_01
def test_02
def test_03
def teardown

They will execute in this order (every test method is wrapped with the 'setup' and 'teardown' methods)

def setup
def test_01
def teardown

def setup
def test_02
def teardown

def setup
def test_03
def teardown

You'll want to write your testcases such that you are not launching your ie browser 66x or 180x, etc... use less methods and more assertions within your methods to prevent this...

B. Keep your test cases organized by objective or method of testing.

For example: If it's a simple navigation test,
1. Keep all the sidebar navigation elements testing in one case.
2. & the main 'div' elements in another.