What is Unit testing?

-
  • A unit is the smallest testable part of an application like functions, classes, procedures, interfaces. Unit testing is a method by which individual units of source code are tested to determine if they are fit for use.
  • Unit tests are basically written and executed by software developers to make sure that code meets its design and requirements and behaves as expected.
  • The goal of unit testing is to segregate each part of the program and test that the individual parts are working correctly.
  • This means that for any function or procedure when a set of inputs are given then it should return the proper values. It should handle the failures gracefully during the course of execution when any invalid input is given.
  • A unit test provides a written contract that the piece of code must assure. Hence it has several benefits.
  • Unit testing is basically done before integration as shown in the image below.
What is unit testingAdvantages of Unit testing:
3. Since the bugs are found early in unit testing hence it also helps in reducing the cost of bug fixes. Just imagine the cost of bug found during the later stages of development like during system testing or during acceptance testing.

4. Unit testing helps in simplifying the debugging process. If suppose a test fails then only latest changes made in code needs to be debugged.

Comments

Post a Comment

Popular posts from this blog

Compare a range of Hardware and Software Troubleshooting Tools

-
Image
H ARDWARE TESTING TOOLS  Hardware testing tools are usually for testing a computer while it off, and to diagnose/fix more complex hardware problems. These tools I am about to compare all have different uses and so are hard to compare in this format MULTI-METER  A multi-meter is used to measure the electrical properties flowing through a cable, such as amperage, voltage and electrical resistance. It can measure other electrical variables as well, but these are mostly not used for computer maintenance purposes.  The multi-meter is generally just used to narrow down the problem to the power supply. However it can also be used to check if the power source the computer’s power supply is connected to, is also running within tolerances. ETHERNET CABLE TESTER  An ethernet cable tester is used to test an ethernet cable’s ability to send/receive data. The tester will usually send some test data or power to the other end, which the tester then chec...
Read more

What is System testing

-
Image
System testing of software or hardware is testing conducted on a complete, integrated system to evaluate the system's compliance with its specified requirements. In system testing the behavior of whole system/product is tested as defined by the scope of the development project or product. It may include tests based on risks and/or requirement specifications, business process, use cases, or other high level descriptions of system behavior, interactions with the operating systems, and system resources. System testing is most often the final test to verify that the system to be delivered meets the specification and its purpose. System testing is carried out by specialists testers or independent testers. System testing should investigate both functional and non-functional requirements of the testing. Types of System Testing Usability Testing -     Usability testing mainly focuses on the user's ease to use the application, flexibility in ha...
Read more

What is Boundary value analysis in software testing?

-
Image
Boundary value analysis  is based on testing at the boundaries between partitions. Here we have both valid boundaries (in the valid partitions) and invalid boundaries (in the invalid partitions). As an example, consider a printer that has an input option of the number of copies to be made, from 1 to 99. To apply boundary value analysis, we will take the minimum and maximum (boundary) values from the valid partition (1 and 99 in this case) together with the first or last value respectively in each of the invalid partitions adjacent to the valid partition (0 and 100 in this case). In this example we would have three equivalence partitioning tests (one from each of the three partitions) and four boundary value tests.  While testing why it is important to do both equivalence partitioning and boundary value analysis? because every boundary is in some partition, if you did only boundary value analysis you would also have tested every equivalence partition. However, this app...
Read more