Assume a method (a constructor) for maintaining customer data that shall be tested.
The following customer data can be entered:

Field 1: Customer-ID -- string with format = LNNLL where ‘L’ stands for letters from ‘A’ to ‘Z’, and 'N' for numbers from ‘0’ to ‘9’, respectively;
Field 2: Birth-Year -- integer in the range [1900, 2100];
Field 3: Business-Area -- string with format = LL where ‘LL’ can be one of the following: ‘SE’ (for ‘South Estonia’) and NE (for ‘North Estonia’).

The following error messages are generated, if incorrect input is typed in: ‘Incorrect Customer ID’, ‘Incorrect Birthdate’, and ‘Incorrect Business Area’.
Which of the following is the best ECP for input data? ‘Best’ means that the list of ECs is most complete and correct.

Question

Assume a method (a constructor) for maintaining customer data that shall be tested. 
 The following customer data can be entered:  
 
 Field 1: Customer-ID --> string with format = LNNLL where ‘L’ stands for letters from ‘A’ to ‘Z’, and 'N' for numbers from ‘0’ to ‘9’, respectively;  
 Field 2: Birth-Year --> integer in the range [1900, 2100];  
 Field 3: Business-Area --> string with format = LL where ‘LL’ can be one of the following: ‘SE’ (for ‘South Estonia’) and NE (for ‘North Estonia’).  
 
 The following error messages are generated, if incorrect input is typed in: ‘Incorrect Customer ID’, ‘Incorrect Birthdate’, and ‘Incorrect Business Area’. 
 Which of the following is the best ECP for input data? ‘Best’ means that the list of ECs is most complete and correct.

Answer

EC1: Customer-ID is a non-empty, well-formed string of the form ‘LNNLL’ as specified;  
 EC2: Customer-ID is empty or not well-formed;  
 EC3: Birth-Year is an integer in range [1900, 2100];  
 EC4: Birth-Year is empty or not an integer or not in range [1900, 2100];  
 EC5: Business-Area is ‘SE’; 
 EC6: Business-Area is ‘NE’; 
 EC7: Business-Area  is empty or not in {SE, NE};

Answer

EC1: Customer-ID is a non-empty, well-formed string of the form ‘LNNLL’ as specified;  
 EC2: Customer-ID is empty or not well-formed;  
 EC3: Birth-Year is an integer in range [1900, 2100];  
 EC4: Birth-Year is empty or not an integer or not in range [1900, 2100];  
 EC5: Business-Area is ‘SE’; 
 EC6: Business-Area is ‘NE’; 
 EC7: Business-Area is a non-empty string; 
 EC8: Business-Area  is empty or not in {SE, NE};

Answer

EC1: Customer-ID is a non-empty, well-formed string of the form ‘LNNLL’ as specified;  
 EC2: Customer-ID is empty or not well-formed;  
 EC3: Birth-Year is an integer in range [1900, 2100];  
 EC4: Birth-Year is empty or not an integer or not in range [1900, 2100];  
 EC5: Business-Area is a non-empty, well-formed string of the form ‘LL’ as specified; 
 EC6: Business-Area  is empty or not in {SE, NE};

Answer

EC1: Customer-ID is a non-empty, well-formed string of the form ‘LNNLL’ as specified;  
 EC2: Birth-Year is an integer in range [1900, 2100];  
 EC3: Business-Area is ‘SE’; 
 EC4: Business-Area is ‘NE’;

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Assume a method (a constructor) for maintaining customer data that shall be test...

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