How to Install Cucumber Eclipse Plugin with Selenium Java and Basic Cucumber Programming |cucumber

Описание: Steps to follow: 1) Launch the Eclipse IDE and go to Help menu, click on “Install New Software”. 2) You will see a dialog window, click on “Add” button. 3) Type name as Cucumber, and type “http://cucumber.github.com/cucumber-e... as location. Click OK.
TDD is an iterative development process. Each iteration starts with a set of test written for a new piece of functionality. These test are supposed to fail during the start of iteration as there will be no application code corresponding to the tests. In the next phase of the iteration, Application code is written with an intention to pass all the test written earlier in the iteration. Once the application code is ready tests are run.

Any failure in the test run are marked and more Application code is written/re-factored to make these tests pass. Once application code is added/re-factored the tests are run again. This cycle keep on happening until all the tests pass. Once all the test pass we can be sure that all the features for which tests were written have been developed.
Benefits of TDD
Unit test prove that the code actually works
Can drive the design of the program
Refactoring allow improving the design of the code
Low-Level regression test suite
Test first reduces the cost of the bugs
Behavior Driven Development
Behavior Driven testing is an extension of TDD. Like in TDD in BDD also we write tests first and the add application code. The major difference that we get to see here are
Test are written in plain descriptive English type grammar
Tests are explained as behaviour of application and are more user-focused
Using examples to clarify requirements
This difference brings in the need to have a language that can define, in an understandable format.
Features of BDD
Shifting from thinking in “tests” to thinking in “behavior”
Collaboration between Business stakeholders, Business Analysts, QA Team and developers
Ubiquitous language, it is easy to describe
Driven by Business Value
Extends Test-Driven Development (TDD) by utilizing natural language that non-technical stakeholders can understand
BDD frameworks such as Cucumber or JBehave are an enabler, acting a “bridge” between Business & Technical Language
BDD is popular and can be utilised for Unit level test cases and for UI level test cases. Tools like RSpec (for Ruby) or in .NET something like MSpec or SpecUnit is popular for Unit Testing following BDD approach. Alternatively, you can write BDD-style specifications about UI interactions. Assuming you’re building a web application, you’ll probably use a browser automation library like WatiR/WatiN or Selenium, and script it either using one of the frameworks I just mentioned, or a given/when/then tool such as Cucumber (for Ruby) or SpecFlow (for .NET).
What is Cucumber?
Cucumber is a testing framework which supports Behavior Driven Development (BDD). It lets us define application behavior in plain meaningful English text using a simple grammar defined by a language called Gherkin. Cucumber itself is written in Ruby, but it can be used to “test” code written in Ruby or other languages including but not limited to Java, C# and Python.
What is SpecFlow?
SpecFlow is inspired by Cucumber framework in the Ruby on Rails world. Cucumber uses plain English in the Gherkin format to express user stories. Once the user stories and their expectations are written, the Cucumber gem is used to execute those stores. SpecFlow brings the same concept to the .NET world and allows the developer to express the feature in plain English language. It also allows to write specification in human-readable Gherkin format.
In Gherkin language, a scenario must include the following keywords:

Given
When
Then
And
Given:

Given keyword is used to specify the preconditions for executing a specific scenario. A scenario may include more than one Given statements or there can be no Given statements for a scenario.

When:

This keyword is used to specify the action or an event performed by the user such as clicking on a button, entering data onto textbox etc. There can be multiple when statements in a single scenario.

Then:

Then keyword is used to specify the expected outcome of an action performed by the user. Ideally, When keyword must be followed by Then keyword to understand the expected result of user actions.

And:
And keyword is used as a conjunction keyword to combine multiple statements. For Example, multiple Given and When statements in a scenario can be combined using the keyword ‘And’.
Feature:
A feature file must provide a high-level description of an Application Under Test (AUT). The first line of the feature file must start with the keyword ‘Feature’ following the description of an application under test. As per the standards prescribed by Cucumber, the feature file must include the following three elements as the first line.
Feature Keyword
Feature Name
Feature Description
The feature keyword must be followed by a feature name.