Test case selection

Test case selection

• The Interval Rule
  AKA: "boundary value testing", "domain testing"
• Given the integer interval [L..U], L <= U
• Base rule: test the end points and at least one interior point
  for L = 0, U = 100: Test on {0,50,100}
• Error values: test the end points and at least one interior point
  Base rule applied to -infinity..L-1 and L+1..infinity
  for L = 0, U = 100: test on {-1000,-1,101,1000}
• Indirect application: applies to non-scalars with scalar properties
  For a list of maximum size 100: test on list sizes {0,50,100}

Example: LineStorage/driver.C

• Top level pseudocode
  initialize lineList
  invoke runTest
  invoke LSReset
  invoke runTest
• runTest pseudocode
  load lineList into LineStorage
  check that every line and word has been stored
  check that line number range errors are detected
  check that word number range errors are detected
• Use of the interval rule
  Number of words on a line
  Number of characters in a word
  Line number parameters: normal and error values
  Word number parameters: normal and error values