Chapter 5.4, Problem 20STE

Program Plan Intro

Testing:

• It denotes an activity to check whether actual results match expected results.
• It guarantees that software system is defect free.
• It involves execution of a software component for evaluating one or more interest properties.
• It identifies errors, gaps or requirements that are omitted related to actual requirements.
• It could be performed manually or using automated tools.
• It can be classified as white or black box testing.
• The manual testing would include testing of software short of any tool.
  • The tester behaves as an end-user.
  • It tests software for identifying any behavior that is unexpected.
  • The different stages include unit, integration, system as well as user acceptance testing.
• The automation testing uses software to test product.
  • It includes automation for a manual process.
  • The test scenarios are been re-run that are been performed manually.
  • It is used for testing application from performance, load in addition to stress view point.

Driver program:

• The driver program contains program’s main function.
• It is responsible for launching program operations.
• It is responsible for converting user program into physical execution unit termed as task.
• Each function must be designed, tested and coded as a discrete unit from rest of program.
• It denotes a testing program for functions or statement that is been written in code.
• It tests the functionality usually for debugging as well as code verification.

Given addTax function:

//Define method addTax

void addTax(double taxRate, double& cost)

{

//Compute cost

cost = cost + ( taxRate/100.0 ) * cost;

}

Explanation:

• The method “addTax()” takes input values as arguments.
• It computes the cost by using input values entered by user.
• The result of operation is been displayed.