Testing

Testing

1. Syntax Errors

   • Syntax errors occur when the appropriate symbols and keywords for a particular programing language are not included in the code.
   • Because syntax eroors are dependant on the upon the prgramming language that is being used, the errors are usually mistakes or omissions made by the programmer.
   • Examples
   • Syntax errors can be avoided by physically checking for errors during the coding period.
     • Once the code is complete a Complier can be used to create an executable code and so it can detect any syntax errors then

2. Logic errors

   • A Logical error is when a program produces an output, but it is incorrect or not as expected.
   • Logical errors are normally caused by mistakes made by a programmer, where an output will be produced but the output is not correct or as expected
   • Logic Error Example
     • A = B - C * D
       • Corrected
         • A = (B - C) * D
           • The Brackets in the corrected version make the difference in the outcome

3. Test Data

   • Normal Data
     • This is data that has chosen data values that should be representative of normal inputs, but also as simple as possible to allow for hand calculations
   • Extreme Data
     • This data is often termed as boundary data. It will consist of acceptable input data that is on the extreme limits of the acceptable range
   • Erroneous Data
     • This data is data that is outside of the acceptable input range or data that is in an incorrect format to that expected

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