This particular API 'Get Work Items Between Builds' possibly has a bug.
Let's assume, I have four builds A, B, C, D and each of them has at least one associated workitem.
Scenario 1:
Invoke the API with fromBuildId as B and toBuildId as D
Expected Result:
It should return all work items between B and D
Actual Result:
Returns work items only for C and D
Scenario 2:
Invoke the API with fromBuildId as B and toBuildId as B
Expected Result:
It should return all work items for B
Actual Result:
Same as expected
Scenario 3:
Invoke the API with fromBuildId as A and toBuildId as D
Expected Result:
It should return all work items between A and D
Actual Result:
Returns work items only for B, C and D
Conclusion: When the fromBuildId and toBuildId are not same, it skips the specified fromBuildId itself and considers from the next build right after the specified fromBuildId
