Explain automated testing with examples and how it works

What is Automated Testing

Testing performed using automation tools is called automation testing. Manual testing, on the other hand, is performed by humans.

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When to use Automation Testing

Testing that involves many repetitive tasks resulting in boredom
Testing of algorithms that require a high degree of attention in which manual testing can be error-prone
Test cases that are needed to run on several various hardware or software platforms
Test cases that are difficult to do under manual testing - for example, in load testing, hundreds of users on different machines are required
Tests that require massive sets of data

Automation testing works very well for many testing types. A few real-world examples:

Performance testing: A performance testing tool will automatically apply different loads to the application and measure its performance.

Security testing: A security testing tool will check the software for known vulnerabilities.

Regression testing: A regression testing tool like Selenium will help you create and automate browser-based regression test cases.

Advantages of Automation Testing

Significantly faster than manual testing
Better accuracy than manual testing
More availability - test from anywhere, anytime
Integrability into the build process - find bugs quickly
Reduces overall cost and increases efficiency

Disadvantages of Automation Testing

Requires skilled resources as setting up and executing these tools can be complicated.
Costly for smaller projects as it has higher upfront costs
Human element still present - still requires people to write good test cases.