A drawbridge gap-time model is opaque and too costly to simulate by hand. Relational properties would still give confidence. Why should testers choose metamorphic testing rather than a traditional expected-result oracle?
Select an answer to reveal the explanation.
Short Explanation
A drawbridge gap-time model is opaque and too costly to simulate by hand, so there is no reliable gold time. Metamorphic testing is the pick when oracles are missing or unaffordable, the system is a black box, and relations are enough to give confidence. A cheaper traditional oracle, requiring white-box plus gold time, and a Chapter 5 type constraint miss that selection.
Full Explanation
Select metamorphic testing when oracles are missing or unaffordable, the model is a black box, or relational properties suffice. A cheaper gold oracle, requiring white-box plus gold time, and substituting a Chapter 5 constraint miss that selection.