Software Testing and Quality Control

Here, the source code is traced reversed (manually) until the site of the cause is found.

We can determine if the functions appear to work according to specification.

It focuses verification efforts on the smallest portion of software design module.

It attempts to uncover data combinations within valid input classes that may cause instability or improper processing.

Basis path testing, or structured testing, is a method for designing test cases intended to examine each mathematically possible path of execution at least once.It is a white-box testing technique.

Equivalence partitioning (also called Equivalence Class Partitioning or ECP) is a software testing technique that divides the input data of a software unit into partitions of equivalent data from which test cases can be derived. It is a black-box testing technique. It is nota form of control-structural testing.

Soak testing, also known as endurance testing, is usually done to determine if the system can sustain the continuous expected load. During soak tests, memory utilization is monitored to detect potential leaks. Also important, but often overlooked is performance degradation. That is, to ensure that the throughput and/or response times after some long period of sustained activity are as good or better than at the beginning of the test. It essentially involves applying a significant load to a system for an extended, significant period of time. The goal is to discover how the system behaves under sustained use.

In the context of software or information modeling, a happy path is a default scenario featuring no exceptional or error conditions, and comprises the sequence of activities executed if everything goes as expected.

This testing is to make sure that valuable and sensitive data can not be accessed inappropriately.

Stress testing is to see how the system performs under extreme conditions, such as a very large number of simultaneous users.

This testing is to ensure that the software will function well as the number of users and size of databases increase.

Then regression test suit contains additional tests that focus on software functions that are likely to be affected by the change.

It defines specific test cases that will be used in an attempt to uncover errors in conformity with requirements.

Stress test suit contains test cases that may cause trashing in a virtual operating system.

Regression tests can be broadly categorized as functional tests or unit tests. Functional tests exercise the complete program with various inputs. Unit tests exercise individual functions, subroutines, or object methods. Both functional testing tools and unit testing tools tend to be third-party products that are not part of the compiler suite, and both tend to be automated. A functional test may be a scripted series of program inputs, possibly even involving an automated mechanism for controlling mouse movements and clicks. A unit test may be a set of separate functions within the code itself, or a driver layer that links to the code without altering the code being tested.