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There are various software testing methods, and traditionally the box approach is divided into three types, white-box, black-box, and gray-box testing.
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White-box testing is inspecting every line of code before the tests even start. It verifies the internal structures or working of a program.
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In Black-box testing, testers in software engineering analyze the requirements of the software and send it back to the development level for error rectification.
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Grey-box testing is a type of testing in software engineering that tests the software or application with partial knowledge of the internal structure of the software.
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Here are the main levels of software testing after functional and non-functional software testing:
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Unit testing is the first level of functional testing in software testing, performed on an individual unit or component to test for correction.
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This testing is the second level of functional testing that focuses on the defect of an interface, communication, and data flow between modules.
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System testing is the third level of functional testing in which the test cases are operated while the test environment and production environment are parallel.
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Acceptance testing is a type of testing in software engineering where the client or business tests the software with real-time business scenarios.
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Security testing is intended to reveal defects in the security mechanism of an information system protecting the data and maintaining functionality.
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Performance testing tests a software’s stability and response time by applying load in the software.
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Usability testing, in software engineering, works from the users’ point of view to check the user-friendliness of the software application.
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Compatibility testing validates how software applications behave and run in various environments, web servers, hardware, and network environments.