watchr – Agile development tool – Ruby gem

watchr - Agile development tool that monitors a directory tree, and triggers a user defined action whenever an observed file is modified. Its most typical use is continuous testing, and as such it is a more flexible alternative to autotest.

Installation:

1. Open Command prompt

2. CMD>gem install watchr

 

Sample Usage:

code.rb 

puts  Time.now.to_s

 

To Run:

in CMD_EXACTPATH>watchr code.rb

 

Note:

Change the code and save frequently. Whenever you are saving the file, WATCHR will execute and displays output in command prompt.

 

Demo Available here –> http://bit.ly/j_watchr

 

Features

watchr is:

• Simple to use
• Highly flexible
• Evented ( Listens for filesystem events with native c libs )
• Portable ( Linux, *BSD, OSX, Solaris, Windows )
• Fast ( Immediately reacts to file changes )

Most importantly it allows running tests in an environment that is agnostic to:

• Web frameworks ( rails, merb, sinatra, camping, invisible, … )
• Test frameworks ( test/unit, minitest, rspec, test/spec, expectations, … )
• Ruby interpreters ( ruby1.8, ruby1.9, MRI, JRuby, Rubinius, … )
• Package frameworks ( rubygems, rip, … )

For more details –> https://github.com/mynyml/watchr/blob/master/README.md

Ruby – Some Useful Links

Ruby:
Homepage : http://www.ruby-lang.org

Downlaod : http://www.ruby-lang.org/en/downloads/

Documentation: http://www.ruby-lang.org/en/documentation/

Libraries: http://www.ruby-lang.org/en/libraries/

Community: http://www.ruby-lang.org/en/community/

News: http://www.ruby-lang.org/en/news/

Security: http://www.ruby-lang.org/en/security/

About Ruby: http://www.ruby-lang.org/en/about/

 

Documentation:

Getting Started –>

http://pine.fm/LearnToProgram/

http://www.ruby-lang.org/en/documentation/quickstart/

http://www.ruby-lang.org/en/documentation/ruby-from-other-languages/

http://rubylearning.com/

http://www.techotopia.com/index.php/Ruby_Essentials

http://www.meshplex.org/wiki/Ruby/Ruby_on_Rails_programming_tutorials
Manual –>
http://www.ruby-doc.org/docs/ProgrammingRuby/

http://www.rubyist.net/~slagell/ruby/

http://en.wikibooks.org/wiki/Ruby_programming_language

 

Reference Documentation –>

http://www.ruby-doc.org/core/

http://www.ruby-doc.org/stdlib/

 
Further details –>

http://ruby-doc.org/

 

books –>

http://www.ruby-doc.org/bookstore

http://antoniocangiano.com/ruby-and-rails-recommended-books/

http://www.rubycentral.com/book/

http://www.freeprogrammingresources.com/ruby-tutorial.html

http://www.programmingbooks.org/Ruby

http://pspxworld.com/book/programming/ruby.php

http://www.sitepoint.com/books/rails1/

http://www.buildingwebapps.com/learning_rails

http://lifehacker.com/software/ruby/free-e+book-teaches-ruby-programming-225976.php

http://kickjava.com/books/ruby.htm

http://www.onlinecomputerbooks.com/free-ruby-books.php

http://www.easywebtech.com/ebooks/Free_Ruby_ebooks_Download-0.html

http://www.scribd.com/doc/1622/Free-Ruby-eBook

http://www.infoq.com/minibooks/ruby

http://www.sapphiresteel.com/The-Little-Book-Of-Ruby

http://www.rorsecurity.info/the-book/

http://www.freebooksclub.net/ruby-ebooks/

http://www.freebookcentre.net/programming-books-download/Whys-(Poignant)-Guide-to-Ruby.html

http://knowfree.net/category/it-ebooks/ruby

http://www.webstuffscan.com/2007/07/13/download-free-ruby-ebooks-pdf/

http://www.webappers.com/2007/10/07/sitepoint-giving-away-ruby-on-rails-complete-free-book/

http://www.freetechbooks.com/ruby-f49.html

http://nealenssle.com/blog/2007/01/05/free-ruby-e-book/

http://www.sapphiresteel.com/The-Book-Of-Ruby-free-in-depth

http://www.asiaing.com/mr.-neighborlys-humble-little-ruby-book-free-ebook.html

http://www.humblelittlerubybook.com/book/

http://2020ok.com/books/37/guide-to-ruby-34437.htm

http://www.bookrags.com/shortguide-ruby-in-the-smoke/

 

Course –>

http://h2kinfosys.com

Ruby – Big Decimal sample usage

Situation:

To  subtract Float and Fixnum values

Normally we will write the code like below

puts  f=123.6 - 123

Output:

0.599999999999994

Problem:

The expected output is 0.6 but it returns 0.599999999999994

Solution:

require 'bigdecimal'
x = BigDecimal("123.6") - BigDecimal("123")
puts x.to_f

Output:

0.6

Ruby — Encryption and Decryption using OpenSSL

Code:

require 'rubygems'
require 'openssl'

$key = "A75435F0B240012A9489000C2952E41F"

class String

def encrypt(key=$key)
e = OpenSSL::Cipher::Cipher.new 'DES-EDE3-CBC'
e.encrypt key
s = e.update self
s << e.final
s = s.unpack('H*')[0].upcase
s
end

def decrypt(key=$key)
e = OpenSSL::Cipher::Cipher.new 'DES-EDE3-CBC'
e.decrypt key
s = self.to_a.pack("H*").unpack("C*").pack("c*")
s = e.update s
s << e.final
end
end
puts "raveendran".encrypt("password")
puts "509067DC2076497134DBF9A7DE5992B2".decrypt("password")

 

Output

 

509067DC2076497134DBF9A7DE5992B2

raveendran

 

Note:

You can chnage the $key vlaue.

You can encrypt the string with password. The password should match when trying to decrypt the encrypted string.

RSpec + Watir WebDriver

Installation:

1. Install Ruby

2. CMD>gem install watir-webdriver

3. CMD>gem install rspec

Code:

google_search.rb

require 'rubygems'
require 'watir-webdriver'

class Google
def search(browser,term,result)

if browser.downcase=="ie"
br= :ie
elsif browser.downcase=="ff"
br= :ff
elsif browser.downcase=="chrome"
br= :chrome
else
br= :ie
end

$ie=Watir::Browser.new br
$ie.goto("http://google.com")
$ie.text_field(:name,'q').set(term)
sleep 3
$ie.button(:name,'btnG').click
sleep 3
$result=$ie.text.downcase.include?(result)

$ie.close
end

end

googleSearch_spec.rb

require 'rubygems'
require 'rspec'
require 'google_search'

describe Google, "#Searchresult" do
it "returns the expected result in search result page" do
bowling = Google.new
bowling.search("chrome","Raveendran","ruby")
$result.should eq(true)
end
end

describe Google, "#Searchresult" do
it "returns the expected result in search result page" do
bowling = Google.new
bowling.search("chrome","Raveendran","wordpress")
$result.should eq(true)
end
end

describe Google, "#Searchresult" do
it "returns the expected result in search result page" do
bowling = Google.new
bowling.search("chrome","Watir, Selenium,Cucumber highline","raveendran")
$result.should eq(true)
end
end

describe Google, "#Searchresult" do
it "returns the expected result in search result page" do
bowling = Google.new
bowling.search("chrome","Ruby highline","raveendran")
$result.should eq(true)
end
end

RUN THE RSPEC code:

1. Navigate to the folder where files available

>rspec googleSearch_spec.rb

 

OUTPUT:

It will launch Chrome browser and will execute the test cases. Finally You will get the output like,

Started ChromeDriver
port=4113
version=14.0.836.0
.Started ChromeDriver
port=4164
version=14.0.836.0
.Started ChromeDriver
port=4218
version=14.0.836.0
.Started ChromeDriver
port=4260
version=14.0.836.0
.

Finished in 77.28 seconds
4 examples, 0 failures

 

Convert Webpage into PDF files using Ruby gems — Watir-Webdriver + Prawn

Installation : 

1. Install Ruby 1.8.7 or 1.9.2

2. Install WatirWebdriver — Refer  http://rubygems.org/gems/watir-webdriver

a. CMD>gem install watir-webdriver

3. Install Prawn Library

a. CMD>gem install prawn

Sample Code:

require 'rubygems'
require 'watir-webdriver'
require 'prawn'

ff=Watir::Browser.new :ff

ff.goto("http://raveendran.wordpress.com")

Prawn::Document.generate('c:\\test123\\hello.pdf') do |pdf|
pdf.text(ff.text)
end

ff.close

Output:

hello PDF  file contains all the TEXT from Webpage

 

Open Issues:

Alignment issue occurs depends upon web page Design. But You wont miss to collect all the Text from Webpage.

Chart Creation using Ruby Gems — Google Charts + Watir WebDriver

Installation : 

1. Install Ruby 1.8.7 or 1.9.2

2. Install WatirWebdriver — Refer  http://rubygems.org/gems/watir-webdriver

a. CMD>gem install watir-webdriver

3. Install Google Charts Library — Refer http://googlecharts.rubyforge.org/

Sample Code:

require 'rubygems'
require 'watir-webdriver'
require 'gchart'

ff=Watir::Browser.new :ff

first=Gchart.bar(:data => [300, 100, 30, 200])
ff.goto(first)
ff.driver.save_screenshot 'c:\\test123\\first.jpg'

second=Gchart.pie_3d(:title => 'Open Source Tools', :size =>
'400x200',:data => [45, 35, 20], :labels => ["Watir", "Selenium", "Others"] )
ff.goto(second)
ff.driver.save_screenshot 'c:\\test123\\second.jpg'
three=Gchart.line(:data => [300, 100, 30, 200, 100, 200, 300, 10],
:axis_with_labels => 'x,r',:axis_labels => [['Jan','July','Jan','July','Jan'], ['2005','2006','2007']])
ff.goto(three)
ff.driver.save_screenshot 'c:\\test123\\three.jpg'

ff.close

Output:

1. Usually Google Charts gives  http urls as a output. Using Watir WebDriver we can open the URL and navigate to the mentioned page and we can save that web page as a Image.

2.  Run the code –> The out folder contains the images

Watir WebDriver — Handling New Window

Situation:

1. You are in Parent Page.
2. Clicking link “Open” in Parent page.
3. It opens new window
4. You need to do actions  there and come back to your parent window

Solution:

To Click the Link

require 'rubygems'
require 'watir-webdriver'
ff=Watir::Browser.new :ff
ff.goto("website.com")
ff.link(:text,'open').click

To handle the New window and performing some actions within that window,

ff.window(:title,/TITLE of the new window/i).use do
ff.send_keys('SampleText')
ff.button(:id,'insert').click
puts ff.title #returns the new window title
end

within a loop The button belongs to Newly opened window.

puts ff.title #returns the parent window title

Watir-webdriver cheatsheet

Getting Started

Load the Watir Webdriver library

require 'watir-webdriver'

Open a browser (Ex: Internet Explorer)

driver = Watir::Browser.new :ie

Go to a specified URL

driver.goto 'http://www.orbitz.com/'

Close the browser

driver.close

Access an Element

Type something in the Text box or text area

driver.text_field(:id,'airOrigin').set("MAA")

To Clear the text from text field 

driver.text_field(:id,'airOrigin').clear

Button

To click the button
driver.button(:id,'BUTTON_ID'').click

Drop down list

To select the value from list
driver.select_list(:id,'airStartTime').select("1 am")

To get the selected value from select field
 driver.select_list(:id,'airStartTime').value

Check box

To clik the check box

driver.checkbox(:id,'airNonStopsPreferred').click
OR
driver.checkbox(:id,'airNonStopsPreferred').set
To know the clicked? or not ?
driver.checkbox(:id,'airNonStopsPreferred').set?

Radio button driver.radio(:id,'htlChoice').click

To verify Flights radio button selected or not

driver.radio(:id,'htlChoice').set?

#if it returns TRUE then radio button already selected.

To get the title of the webpage puts driver.title

Return true if the specified text appears on the TAG

 puts driver.li(:class,'welcomeText').text.include("Welcome to Orbitz")

To Click SPAN Elements driver.span(:text,'Find Flights').click

To access the elements within IFrame using Selenium WebDriver (Ruby)

Situation :

User want to click the field which is placed within 2 IFrames using selenium webdriver.

Field — Friendship

Source code for “Friendship” — <nobr>Friendship</nobr>

Frame ID’s –” nav”  and “JobplaceFrame”

Code:

require ‘rubygems’

require ‘selenium-webdriver’

$browser = Selenium::WebDriver.for :ie

$browser.get "http://URL.com”

current_title=$browser.title
if current_title == “TITLE OF THE WEBPAGE”
puts “step 1 passed”
else
puts “step1 failed”
exit
end

$browser.switch_to.frame(‘nav’) #parent Frame
$browser.switch_to.frame(“JobplaceFrame”) #Child frame

options=$browser.find_elements(:tag_name=>”nobr”)

options.each do |nobr_field|
if nobr_field.text == 'Friendship'
nobr_field.click
break
end
end