Câu 25: CTAL-TAV4-0: Certified Tester Advanced Level - Test Analyst v4.0

A route-finding application receives as input - a starting point, an ending point, and a map with information on which streets are one-way. The application returns the length of the shortest possible route (in meters). You want to test the correctness of this system with metamorphic testing using the following two metamorphic relations:MR1: for a given route from point A to point B, if one or more one-way streets are changed to two-way streets, the route length cannot increase.MR2: for a given map and points A, B, and C, the length of a route from A to C cannot be longer than the sum of the lengths of two routes: from A to B and from B to C. You have two source test cases:TC1: Start: P1, end: P2, one-way streets: S1, S2, S3. Result: route length = 1680 m.TC2: Start: P2, end: P3, one-way streets: S1, S2, S3. Result: route length = 400 m. Which test case reveals a system failure due to a violation of metamorphic relation MR1 or MR2?

1. A. Start: P1, end: P3, one-way streets: S1, S2. Result: route length = 500 m
2. B. Start: P1, end: P3, one-way streets: S1, S2, S3. Result: route length = 2080 m
3. C. Start: P2, end: P3, one-way streets: S1, S3. Result: route length = 580 m — đáp án hiện tại
4. D. Start: P1, end: P2. one-way streets: S1, S2, S3. Result: route length = 1500 m