Make Test Case as Assistant

Introduction

Assume you use TDD, write test case first, and now you need to start to produce the minimum amount of code to pass that test.

This article describe how to make a test case as an assistant that can keep updating current issue when you are writing code, so you do not need to run test case by hand periodically to check current status.

Result

Please refer to the online demo:
ruby selenium auto retest

Pre-Request

Actually not really needed, just related for this article,
can work with local driver from terminal well.

Use Remote Webdriver in Selenium

Create Parameterized Test Service with Jenkins

Steps

1. Create an error filter

As an assistant, I wish it can report summarized error message in stead of full backtrace, so I write a filter method in test helper:

def self.displayError (error, file)
  puts "Error: " + error.message
  errArray = error.backtrace.map{ |x|
    x.match(/^(.+?):(\d+)(|:in `(.+)')$/); 
    [$1,$2,$4]
  }
  errArray.each do |err|
    if err[0].end_with? File.basename(file)
      puts "Line: "+err[1]+", "+err[2]+", File: "+File.basename(file)
      puts ""
    end
  end
end

2. Make it can retest automatically if failed.

So it will do test again and again until everything works fine, the code will as below:

reTest = true
# ...
while reTest do
  # clear reTest
  reTest = false
  # do some action and quit
  begin
    # ...
  rescue => error
    reTest = true
    # ...
  ensure
    driver.quit unless reTest
  end
end

Done, now you can run the test case then start to write your code, you will keep receiving current status from the test case.



Added/Updated Files


Modified test_helper.rb


Added auto_retest_if_fail_test.rb

Added auto_redo_test.html

Added ubuntu_folder
So can use remote webdriver for 127.0.0.1



References

Ruby - get the file being executed

Catching line numbers in ruby exceptions