Introduction to Software Testing

Software Testing: 
The process of verifying or validating an application with the intention of finding bugs or defect in software so that it could be corrected before product is delivered to the end user. 
                                                            (OR)
It is an activity to verify whether actual results are matched with expected results and ensure software is defect free, provide customer satisfaction.
Software testing has come to play a vital role in the success of the business.
This can be done through either manually or using automation tool.
Project vs Product:
Project: If a software application designs for a specific client, then it is called PROJECT. 
                                                            (OR)
    If any organization is developing the application according to the client specification then it is called as project
Ex: Banking web sites like HDFC Netbanking site, IRCTC, APSRTC etc.,
Product: If a software application is design for multiple clients, then it is called a PRODUCT. 
                                                           (OR)
If any organization is developing the application and marketing it is called as PRODUCT.
Example: Windows, Gmail, WhatsApp etc.,
Types of Software Testing:

1. Functional Testing
2. Non-Functional Testing

Functional Testing: Functional Test is a type of software testing whereby the system is tested against the functional requirements/specifications.

Functional testing is done to verify all the functionality of a product. 

This testing mainly involves black box testing and it is not concerned about the source code of the application. The Testing can be done either manually or using Automation tool.

Typically, functional testing involves the following steps:

• Identify functions that the software is expected to perform.
• Create input data based on the function’s specifications.
• Determine the output based on the function’s specifications.
• Execute the test case.
• Compare the actual and expected outputs.

Non-Functional Testing: type of Software testing to check non-functional aspects of a software application. Non functional testing activities includes:

• Performance testing
• Load Testing
• Stress testing
• Volume testing
• Security testing
• Installation testing
• Compatibility Testing
• Recovery testing