Selenium IDE

            The Selenium-IDE (Integrated Development Environment) is the tool you use to develop your Selenium test cases. It’s an easy-to-use Firefox plug-in and is generally the most efficient way to develop test cases.

             It also contains a context menu that allows you to first select a UI element from the browser’s currently displayed page and then select from a list of Selenium commands with parameters pre-defined according to the context of the selected UI element. This is not only a time-saver, but also an excellent way of learning Selenium script syntax.

Merits:

a. Easy to use.

b. Easy to identify element id's and xpath of the id's

De-Merits:
a. It works only with Firefox. So thers is no possibility of browser compatibility testing.
b. IDE script is not customizable.

Selenium

Selenium Information:

1. Selenium IDE:

                         

                          The Selenium-IDE (Integrated Development Environment) is the tool you use to develop your Selenium test cases. It’s an easy-to-use Firefox plug-in and is generally the most efficient way to develop test cases.

                         It also contains a context menu that allows you to first select a UI element from the browser’s currently displayed page and then select from a list of Selenium commands with parameters pre-defined according to the context of the selected UI element. This is not only a time-saver, but also an excellent way of learning Selenium script syntax.

2. Selenium RC:

3. Selenium Grid:

TestNG

TestNG (http://testng.org/doc)

TestNG is a testing framework inspired from JUnit and NUnit but introducing some new functionality that make it more powerful and easier to use, such as:

* JDK 5 Annotations (JDK 1.4 is also supported with JavaDoc annotations).
* Flexible test configuration.
* Support for data-driven testing (with @DataProvider).
* Support for parameters.
* Allows distribution of tests on slave machines.
* Powerful execution model (no more TestSuite).
* Supported by a variety of tools and plug-ins (Eclipse, IDEA, Maven, etc...).
* Embeds BeanShell for further flexibility.
* Default JDK functions for runtime and logging (no dependencies).
* Dependent methods for application server testing.

TestNG is designed to cover all categories of tests: unit, functional, end-to-end, integration, etc...