testing Software Testing Techniques - State Transition Ticket system

Example

The rule

A ticket system have their valid transitions documented in the following table, where O represents allowed and X represents not allowed.

From \ To	Reported	Open	In Progress	In Review	Delivered	Rejected	Reopen
Reported	-	O	X	X	X	O	X
Open	X	-	O	X	X	O	X
In Progress	X	X	-	O	X	O	X
In Review	X	O	O	-	O	O	X
Delivered	X	X	X	X	-	X	O
Rejected	X	X	X	X	X	-	X
Reopen	X	X	O	X	X	X	-

How to apply technique

There is no much secret applying this technique to design test cases.

1. Each transition show be be represented by one test case
2. There is no transition from one state to itself (diagonal line with dots)
3. The number of test cases is always equals to ( (n * n) - n )

For this case we have 7 states (n = 7). So we will have 42 test cases, as follows:

1. From Reported to Open (positive)
2. From Reported to In Progress (negative)
3. From Reported to In Review (negative)
4. From Reported to Delivered (negative)
5. From Reported to Rejected (positive)
6. From Reported to Reopen (negative)
7. From Open to Reported (negative)
8. From Open to In Progress (positive)
9. From Open to In Review (negative)
10. From Open to Delivered (negative)
11. From Open to Rejected (positive)
12. From Open to Reopen (negative)
13. From In Progress to Reported (negative)
14. From In Progress to Open (negative)
15. From In Progress to In Review (positive)
16. From In Progress to Delivered (negative)
17. From In Progress to Rejected (positive)
18. From In Progress to Reopen (negative)
19. From In Review to Reported (negative)
20. From In Review to Open (positive)
21. From In Review to In Progress (positive)
22. From In Review to Delivered (positive)
23. From In Review to Rejected (positive)
24. From In Review to Reopen (negative)
25. From Delivered to Reported (negative)
26. From Delivered to Open (negative)
27. From Delivered to In Progress (negative)
28. From Delivered to In Review (negative)
29. From Delivered to Rejected (negative)
30. From Delivered to Reopen (positive)
31. From Rejected to Reported (negative)
32. From Rejected to Open (negative)
33. From Rejected to In Progress (negative)
34. From Rejected to In Review (negative)
35. From Rejected to Delivered (negative)
36. From Rejected to Reopen (negative)
37. From Reopen to Reported (negative)
38. From Reopen to Open (negative)
39. From Reopen to In Progress (positive)
40. From Reopen to In Review (negative)
41. From Reopen to Delivered (negative)
42. From Reopen to Rejected (negative)