Program Development Life Cycle - Testing | Computer for GCSE/IGCSE - Year 11 PDF Download

Testing

• Once the overall program or set of programs is developed, they undergo multiple rounds of testing with different sets of test data. This process ensures that the programs function correctly according to the initial requirements and design, identifying and rejecting any invalid input data.
• Examples of test data include using alphanumeric sequences to evaluate password validation procedures. For instance:
  • Password length validation: Ensuring a password falls within the specified range of 8 to 20 characters. Test data might involve passwords shorter than 8 characters or longer than 20 characters.
  • Alphanumeric character validation: Verifying that passwords contain only alphanumeric characters. Test data could consist of passwords containing non-alphanumeric symbols like @, ?, #, !, $, or %.

Examples 1

• Example of a valid password: "SecurePwd123" - This password is 12 characters long and includes both letters and numbers, meeting the criteria.
• Example of an invalid password: "Weak@Password!" - This password includes a special character "@" and "!", making it invalid as it violates the alphanumeric character rule.

Examples 2

• Testing with a password "ShortPwd" (7 characters) - This test case should fail as the password is below the minimum length of 8 characters.
• Testing with a password "VeryLongPassword1234567890" (24 characters) - This test case should also fail as the password exceeds the maximum length of 20 characters.
• Testing with a password "Special@Pwd123" - This test case should fail due to the presence of the special character "@" which is not allowed.