What is Structural Testing

Structural Testing includes:

• Cover structure, quality and style.
  
  
• Implementation based.
  
  
• Best done by programmer.
  
  
• Not aiming at testing functions or detecting missing functions.
  
  
• The tester analyses the code and use knowledge about the structure of a component to derive the test data.
  
  
• Simplest form of testing includes:
  - Statement coverage
  - Branch coverage

Cause-effect Analysis

Another analysis you should consider in Functional Testing is Cause-effect Analysis. This includes:

• Even when a program operates successfully for individual test inputs, combinations of these inputs may detect program errors.
  
  
• Involves examining the output and analysing to see if combinations of input partitions always cause outputs in the same output partition to be producted.
  
  
• The causes of these effects used as test cases.
  

Boundary Value Analysis

In Functional Testing, one of the consideration is Boundary Value Analysis. This includes:

• Input conditions are 'edges' of equivalence class.
  
  
• Values like above and below range, minimum and maximum number and up to the array limit.