Manual Testing and Automation Testing.

Manual testing

• Manual testing is the process of manually testing software for defects. 
• It requires a tester to play the role of an end user, and use most of all features of the application to ensure correct behavior. 
• To ensure completeness of testing, the tester often follows a written test plan that leads them through a set of important test cases.
• Manual testing is a laborious activity that requires the tester to possess a certain set of qualities; to be patient, observant, speculative, creative, innovative, open-minded, resourceful, unopinionated, and skillful.

Automation Testing

• Test automation is the use of software to control the execution of tests, the comparison of actual outcomes to predicted outcomes, the setting up of test preconditions, and other test control and test reporting functions.
• Commonly, test automation involves automating a manual process already in place that uses a formalized testing process.
• Test automation is the process of writing a computer program to do testing that would otherwise need to be done manually. 
• Once tests have been automated, they can be run quickly and repeatedly. 
• This is often the most cost effective method for software products that have a long maintenance life, because even minor patches over the lifetime of the application can cause features to break which were working at an earlier point in time.