Request for Review 7175758 : Improvements to Collisions.java regression test

[Mike Duigou]

Hello all;

This review is for test changes only. CR#7174736 (http://hg.openjdk.java.net/jdk8/tl/jdk/rev/fc0e508b713f) corrected a problem uncovered by a JCK test. A regression test was not included in that changeset. This patch adds a regression test for the root cause of CR#7174736 as well as additional tests on Map iterators and the Iterator.remove() functionality.

http://cr.openjdk.java.net/~mduigou/7175758/0/webrev/

The reduction in "ITEMS" is to ensure that the test runs in reasonable time. 10000 keys caused the test to run for too long (especially with these additional tests).

Mike