--%>
Assignment Help - homework help

Explain Automated Testing-Software testing

Automated Testing: Software testing is the most generally used technique for verifying and validating software. While testing may not provide the same rigor as model checking, it is far more scalable and usually does not require a significant tool infrastructure; thus its initial cost and learning curve is low. However, for complex systems these benefits are more than offset by the fact that it is hard to develop the “right” test cases that provide sufficient coverage. This difficulty often reduces coverage despite use of many test cases. The consequence is that testing is a very labor intensive process that typically accounts for about half the total cost of software development and maintenance while yielding poor reliability due to inadequate coverage (Bezier 1990)].

Automating testing not only decreases the cost of verifying and validating software but also increases its reliability. A recent report by the National Institute of Standards and Technology estimates that software failures currently cost the US economy about $60 billion every year, and that improvements in software testing infrastructure might save one-third of this cost (NITT 2002). Testing, and in particular test case generation, lends itself to automation and has been the focus of much research attention; it has also been adopted in industry (Parasoft; T-VEC; Drusinsky 2000; Grieskamp et al. 2002). We distinguish between two main approaches to automatic test case generation: black boxand white box. In the black-box approach, test cases are generated based on a specification of the inputs, while in the white-box approach, test cases are generated based on the analysis of the software under test or of a model of this software.

The quality of a test suite is measured in terms of test coverage, such as structural code coverage, MC/DC, path coverage, and requirements coverage. In addition to program inputs, test cases also need to specify the expected output. This can be done by using testing oracles that encode the functional specifications of the software under test as assertions in the code, post-conditions, etc.

   Related Questions in Programming Languages

  • Q : Explain the differences among SEI

    What in your advice are the most important fundamental differences among SEI SW-CMM and ISO 9000-3?

    		•
  • Q : Define the term Marking interface

    Define the term Marking interface: It is an interface with no methods.

    		•
  • Q : Problem on Planar scintigraphy Let

    Let assume seven PMTs situated around the origin of the x-y coordinates on the face of the Anger camera as illustrated in the figure. The size of the PMTs is 2mm by 2 mm and each PMT has been allocated a number. The single scintillation event yields a response from PM

    		•
  • Q : Explain Branch instruction Branch

    Branch instruction: It stores a new instruction address into the program counter. The consequence of this is the next instruction to be fetched will not generally be the one instantly following the branch instruction. Therefore the normal chronologica

    		•
  • Q : Mission Critical Systems or a real-time

    Determine the important aspect of Mission Critical Systems or a real-time system.

    		•
  • Q : What is Append mode Append mode : It is

    Append mode: It is a file writing mode, in which the existing contents of a file are maintained whenever the file is opened. Novel contents are appended to the existing.

    		•
  • Q : Define Function Function : The name

    Function: The name given to assembly of statements which does some particular task and might return a value. Function can be invoked (or called) any number of time and anywhere in the program.

    		•
  • Q : Retrieve the text for ORA-12705 Normal

    Normal 0 false false

  • Q : Define the term CPU Scheduler Define

    Define the term CPU Scheduler?

    		•
  • Q : What is Static method Static method :

    Static method: The static method (also termed as a class method) is one with static reserved word in its header. The static methods vary from all other methods in that they are not related with any specific instance of the class to which they fit in.

    		•