Add missing cases to SpliteratorTraversingAndSplittingTest. This came up when I was fixing https://bugs.openjdk.org/browse/JDK-8372946, and I noticed the tests do not cover these sub-maps.
Two interesting parts:
1. These tests failed when first added because `SubMapKeyIterator` and `DescendingSubMapKeyIterator` do not eagerly throw `NullPointerException` for `null` action arguments. The spec says "Throws: NullPointerException - if the specified action is null", so I updated the implementation to match other spliterators. 2. Since the descending maps have the reverse expected iteration order, I added support in the test harness for descending maps.
Oli Gillespie has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains four additional commits since the last revision: - Update copyright - Merge remote-tracking branch 'origin/master' into spliterator-test - Switch to Objects.requireNonNull - Add tests and fix impl ------------- Changes: - all: https://git.openjdk.org/jdk/pull/29485/files - new: https://git.openjdk.org/jdk/pull/29485/files/82be36d8..f376e3c1 Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=29485&range=01 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=29485&range=00-01 Stats: 89511 lines in 1537 files changed: 44815 ins; 21887 del; 22809 mod Patch: https://git.openjdk.org/jdk/pull/29485.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29485/head:pull/29485 PR: https://git.openjdk.org/jdk/pull/29485