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Unit Testing<\/b> is a type of software testing in which individual software units or components are tested. The goal is to ensure that each unit of software code performs as expected. Developers perform unit test during an application’s development (coding phase). Unit tests isolate and verify the correctness of a section of code. A unit is a single function, method, procedure, module, or object.<\/span><\/p>\n Unit testing<\/b> is the first level of testing performed before integration testing in <\/span>SDLC<\/span><\/a>, <\/span>STLC<\/span><\/a>, and V models. Unit test is a type of White Box testing that the developer typically performs. In practice, however, due to time constraints or developers’ reluctance to test, QA engineers also perform unit test.<\/span><\/p>\n Unit testing<\/b> is important because software developers often try to save time by performing minimal unit test; however, this is a myth because insufficient unit test leads to high-cost defect fixing during System Testing, Integration Testing, and even Beta Testing after the application is built. Proper unit testi during early development saves time and money in the long run.<\/span><\/p>\n The following are the primary reasons for performing unit test in software engineering:<\/span><\/p>\n Developers use Unit Test to test a specific function in a software application by writing a code section. Developers can also isolate this function to test it more thoroughly, revealing unnecessary dependencies between the test function and other units that can be eliminated. Developers commonly use the UnitTest framework to create automated test cases for unit test.<\/span><\/p>\n There are two kinds of unit test:<\/span><\/p>\n Unit testing is frequently automated, but it can also be done manually. There is no preference in software engineering for one over the other, but automation is preferred. A step-by-step instructional document may be used in a manual approach to unit test.<\/span><\/p>\n Under the automated approach-<\/b><\/p>\n A developer writes code in the application to test the function. When the application is deployed, they will comment and eventually remove the test code.<\/span><\/p>\n A developer could also isolate the function to test it more thoroughly. This is a more comprehensive unit test practice that involves copying and pasting code to its testing environment rather than its natural environment. Isolating the code aids in discovering unneeded dependencies between the code under test and other units or data spaces in the product. These reliances can then be removed.<\/span><\/p>\n A coder will typically use a UnitTest Framework to create automated test cases. The developer uses an automation framework to code criteria into the test to ensure that the code is correct. The framework logs failing test cases while they are being executed. Many frameworks will also flag and report these failed test cases automatically. The framework may halt subsequent testing depending on the severity of a failure.<\/span><\/p>\n Unit test workflow is as follows:<\/span><\/p>\n 1) Create Test Cases\u00a0<\/span><\/p>\n 2) Rework\/Review\u00a0<\/span><\/p>\n 3) Baseline\u00a0<\/span><\/p>\n 4) Carry out test cases.<\/span><\/p>\n Unit testing techniques are divided into three categories: Black box testing, white box testing, and grey box testing.\u00a0<\/span><\/p>\n Code coverage techniques used in Unit Test are listed below:<\/span><\/p>\n<\/span>Why is Unit Testing Necessary?<\/span><\/span><\/h2>\n
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<\/span>How to Perform Unit Testing<\/span><\/span><\/h2>\n
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<\/span>Unit Testing Techniques<\/span><\/span><\/h2>\n
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