WhiteBoxTesting

# Determine discretionary employee retirement

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// determine discretionary employee retirement contribution if ( m_employee[ id ].WantsRetirement && EligibleForRetirement( m_employee[ id ] ) ) { companyRetirement = GetRetirement( m_employee[ id ] ); } grossPay = ComputeGrossPay( m_employee[ id ] ); // determine IRA contribution personalRetirement = 0; if (EligibleForPersonalRetirement( m_employee[ id ] ) { personalRetirement = PersonalRetirementContribution( m_employee[ id ], companyRetirement, grossPay ); } // make weekly paycheck withholding = ComputeWithholding( m_employee[ id ] ); netPay = grossPay - withholding - companyRetirement - governmentRetirement - personalRetirement; PayEmployee( m_employee[ id ], netPay ); // add this employee's paycheck to total for accounting totalWithholdings += withholding; totalGovernmentRetirement += governmentRetirement; totalRetirement += companyRetirement; } SavePayRecords( totalWithholdings, totalGovernmentRetirement, totalRetirement ); What test cases do we need to achieve Line coverage? Branch coverage? Complete condition testing? Partial condition testing?

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Loop Testing Design test cases based on looping structure of the routine Testing loops Skip loop entirely One pass Two passes N-1, N, and N+1 passes [N is the maximum number of passes] M passes, where 2 < M < N-1
Loop Testing int ReadLine(istream & is, char buf[], int bufLen) { int count = 0; while (count < bufLen) { int c = is.get(); if (c != -1 && c != '\n') buf[count++] = (char)c; else break; } return count; } What test cases do we need? 1) Skip loop entirely: a. bufLen == 0 2) Exactly one pass: a. line of length 1 (including the '\n') OR bufLen == 1 3) Exactly two passes: a. line of length 2 OR bufLen == 2 4) N-1, N, and N+1 passes: a. lines of length bufLen-1, bufLen, and bufLen+1 5) M passes, where 2 < M < N-1 a. line of length bufLen / 2

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