Software Testing
Task1.1
Describe the purpose of software testing and provide examples of its commercial effectiveness.
Purpose of Software Testing:-
The main purpose of software testing is to ensure that the software package that has been created is running as it has been programmed, to work out any glitches or code that prevent the program from completing the actions and functions that it has been set within the code, although this is the purpose of software testing, this is not the aim, the aim of software testing is to ensure that all of the functions of a piece of software will not impact on the user in a negative way, the ease of usability and the maintainability of a piece of software.
There are a number of different styles/types
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Fault Tolerant Testing:-
Fault Tolerant testing is used to verify that the packages actions does not perform in detrimental nor unexpected ways for input parameters that could be illegal or out of range, and have the required catches in place to help prevent these input parameters being used; fault tolerant testing ensures that the software works smoothly and as elegantly as possible.
Integration Testing:-
Integration testing is used to make sure that the software package can be used with subsystems and other software packages sharing data and or converting information between multiple sub systems, as well as verifying that they can be used together with other packages and the parameters which are passed between them can and are handled correctly.
Regression Testing:-
Regression Testing is used to retest the sub systems /units/modules and also help ensure that any modifications that have been applied to any or all of these areas do not cause any unwanted or unexpected results within the current system or a connected subsystem or software package that is linked to the one being tested.
Software Testing Examples
There are a number of examples that I can use to show situations where software testing has been correctly completed and where software has not and I shall
Testing of the entire system will be performed to verify that all parts and counterparts are functional. This is the testing that is made prior to release. Tests performed in this stage verify for the following:
Testing is when you check for faults, take measures to check quality, look at reliability and look at the
This chapter focuses on conducting the test case on each software unit and showing the obtained results in the form of snapshots taken where each snap describes the process being done.
Test Plan: The software is tested using two levels of testing viz. black box testing and white box testing. White box testing could be carried out in three different phases viz. unit testing system/integration testing and validation testing. • Unit Testing: Unit testing, also known as Module Testing, focuses verification efforts on the module. The module is tested separately and this is carried out at the programming stage itself.Unit Test comprises of the set of tests performed by an individual programmer before integration of the unit into the system. Unit test focuses on the smallest unit of software design- the software component or module. Using component level design, important control paths are tested to uncover errors within the boundary of the module. Unit test is white box oriented and the step can be conducted in parallel for
Testing is the next phase of the implementation phase. A comprehensive testing program includes a stepwise process starting with unit testing, followed by testing of group components called integration testing and concluded with entire systems test (Satzinger et al., 2004, p. 640). Individual units or modules are tested prior to integration with more advanced modules, using driver modules. Once a set of modules are put together, integration testing can take place. These test include checking for interface compatibility, run-time exceptions, parameter values and unexpected state interactions (Satzinger et al., p. 644-645). Jeff Theobald suggests that an effort should be made to concentrate not on just errors in a single application or module, but also the system as a whole and between systems (Theobald, 2007). After these tests are completed, the project goes on to system testing. System testing often involves daily “build and smoke” tests, where the system is set to run and is observed for “smoke” or errors (McConnell, 1996). The TPI credentialing system was tested in this manner. The project made it through the first two testing
System testing will help identify if normal or incorrect actions in the program are working correctly because every line of the program code should be able to execute test errors messages.
In Edith Hamilton’s book, Mythology: Timeless Tales of Gods and Heroes, Jason the main character in the story, “The Quest of the Golden Fleece,” is not hero for the following reasons: he is selfish; he delegates; and he is dishonest. Jason is not a hero because he is selfish for only thinking of ambition. The text states, “…he thought of ambition only, never of love or of gratitude” (133). During the long quest for the Golden Fleece, Jason was only focused on being successful. If Jason were a hero, he would be doing this out of love to help others not of ambition.
An important rule to follow before integration testing is ensuring that the individual segments are working properly. System testing is the last step in the testing phase and is designed to ensure that the system as a whole is working properly. During system testing users have the opportunity to interact with the system.
System Tests – To test the system as a whole to make sure all components are interacting with each other as they should.
Software testing involves execution of a software or service to check the quality of software product or service. It evaluates whether software components meet the given requirements or not. It also evaluates functionality of the software and time taken by it to run. [1] Software testing is very important for controlling the cost of the software project. Traditionally, we design and develop the program first. However, Test Driven Design (TDD) involves writing the test cases for new functions of a software first and then implementation of the code to pass these tests. This cycle of writing test cases and implementing the code is repeated till all the functionalities of the code are implemented. [2] Now, we
Static testing is performed in the first phase of a software project. It begins the moment requirement documents are prepared so as to improve software quality by detecting the errors in the early stage of development. During the requirement phase, by detecting the maximum number of errors, one can save the time and cost of
Performed Regression Testing to verify that bug fixes did not break some other parts of the system.
White box testing methodologies utilize the usage from claiming product parts will create test suites. The implementation of a software component describes how the component produces output values out of input values.
Unit testing is a software development process where the smallest testable parts of an application are independently tested in isolation for proper operation. It is often automated and can be done manually. This form of testing is a component of Extreme Programming, where it takes a meticulous approach towards software development by means of continual and revision testing. The unit tests should be calls to these routines with different input parameters. In addition, unit testing involves only the characteristics that are vital to unit performance under test, which encourages the developers to manipulate the source code without immediate concerns about how such changes would affect the functioning of the program as a whole. Once all units in a program has been found to be working efficiently, larger components of the program can be evaluated via integration testing.
It is done once after the completion of integration after individual unit. The unit testing is mainly used to test applications, business process and system configuration. It is used for basic testing. Unit testing that has each a unique path of a business process that performs accurately to that document that specifies the contents clearly defined inputs and expected output.