[HDFS-4875] Add a test for testing snapshot file length

• Type: Sub-task
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 2.1.0-beta, 3.0.0-alpha1
• Fix Version/s: 2.1.0-beta
• Component/s: snapshots, test
• Hadoop Flags: Reviewed
• Assignee: Arpit Agarwal
• Reporter: Tsz-wo Sze
• Created: 04/Jun/13 07:32
• Updated: 12/May/16 18:12
• Resolved: 17/Jun/13 17:45

Description

Here is a test idea from Suresh:

• A file was length x at the time of snapshot (say s1) creation
• Later y bytes get added to the file through append

When client gets block locations for the file from snapshot s1, the length it know is x. We should make sure it cannot read beyond length x.