8282402: Create a test for checking the effect of down arrow after adding text on a line preceding a blank line

[manukumarvs]

Create a regression test for JDK-4666101.

DESCRIPTION OF THE ACTUAL PROBLEM :
In a JEditorPane, the down arrow has no effect after you add text on a line preceding a blank line.

Testing:
As the original issue was reported in JDK 1.4.0 and it was fixed in JDK 1.4.2, I have verified the working of this test in those Java versions and the results are as follows:

Java 1.4.0 -> Test Failed.
$ ./j2sdk1.4.0/bin/java JEditorBugWin
Caret Updated : 3
Test Failed, Down Arrow Key Not Functional, expected caret position is 5, but actual is 4

Java 1.4.2 -> Test Passed.
$ ./j2sdk1.4.2/bin/java JEditorBugWin
Caret Updated : 5
Test Passed, Down Arrow Key Functional

---

Progress

• Change must not contain extraneous whitespace
• Commit message must refer to an issue
• Change must be properly reviewed

Issue

• JDK-8282402: Create a regression test for JDK-4666101

Reviewers

• Alexey Ivanov (@aivanov-jdk - Reviewer)

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.java.net/jdk pull/7623/head:pull/7623
$ git checkout pull/7623

Update a local copy of the PR:
$ git checkout pull/7623
$ git pull https://git.openjdk.java.net/jdk pull/7623/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 7623

View PR using the GUI difftool:
$ git pr show -t 7623

Using diff file

Download this PR as a diff file:
https://git.openjdk.java.net/jdk/pull/7623.diff

[bridgekeeper]

👋 Welcome back mvs! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[openjdk]

@manukumarvs The following label will be automatically applied to this pull request:

• client

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[mlbridge]

Webrevs

• 02: Full - Incremental (dc26ec28)
• 01: Full - Incremental (5dec2a8a)
• 00: Full (95148f72)

[manukumarvs]

@aivanov-jdk Can you please review this.

[openjdk]

@manukumarvs This change now passes all automated pre-integration checks.

ℹ️ This project also has non-automated pre-integration requirements. Please see the file CONTRIBUTING.md for details.

After integration, the commit message for the final commit will be:

8282402: Create a regression test for JDK-4666101

Reviewed-by: aivanov

You can use pull request commands such as /summary, /contributor and /issue to adjust it as needed.

At the time when this comment was updated there had been 192 new commits pushed to the master branch:

• c777bb3: 8282619: G1: Fix indentation in G1CollectedHeap::mark_evac_failure_object
• 080baff: 8282483: Ensure that Utils.getAllInterfaces returns unique instances
• 57020fd: 8282582: Unused methods in Utils
• 5c187e3: 8282593: JDK-8281472 breaks 32-bit builds and gtests
• 7822cbc: 8276711: compiler/codecache/cli tests failing when SegmentedCodeCache used with -Xint
• 832729b: 6911375: mouseWheel has no effect without vertical scrollbar
• 0402a28: 8037965: NullPointerException in TextLayout.getBaselineFromGraphic() for JTextComponents
• d4d1fbc: 8282484: G1: Predicted old time in log always zero
• b1f935c: 8277055: Assert "missing inlining msg" with -XX:+PrintIntrinsics
• 2da6777: 8281122: [IR Framework] Cleanup IR matching code in preparation for JDK-8280378
• ... and 182 more: https://git.openjdk.java.net/jdk/compare/f07b8165231799383303e5c0755d07afd2feb7fd...master

As there are no conflicts, your changes will automatically be rebased on top of these commits when integrating. If you prefer to avoid this automatic rebasing, please check the documentation for the /integrate command for further details.

As you do not have Committer status in this project an existing Committer must agree to sponsor your change. Possible candidates are the reviewers of this PR (@aivanov-jdk) but any other Committer may sponsor as well.

➡️ To flag this PR as ready for integration with the above commit message, type /integrate in a new comment. (Afterwards, your sponsor types /sponsor in a new comment to perform the integration).

[manukumarvs]

/integrate

[openjdk]

@manukumarvs
Your change (at version 5dec2a8) is now ready to be sponsored by a Committer.

[manukumarvs]

/integrate

[openjdk]

@manukumarvs
Your change (at version dc26ec2) is now ready to be sponsored by a Committer.

[aivanov-jdk]

/sponsor

[openjdk]

Going to push as commit 1581e3f.
Since your change was applied there have been 193 commits pushed to the master branch:

• 268fa69: 8282511: Use fixed certificate validation date in SSLExampleCert template
• c777bb3: 8282619: G1: Fix indentation in G1CollectedHeap::mark_evac_failure_object
• 080baff: 8282483: Ensure that Utils.getAllInterfaces returns unique instances
• 57020fd: 8282582: Unused methods in Utils
• 5c187e3: 8282593: JDK-8281472 breaks 32-bit builds and gtests
• 7822cbc: 8276711: compiler/codecache/cli tests failing when SegmentedCodeCache used with -Xint
• 832729b: 6911375: mouseWheel has no effect without vertical scrollbar
• 0402a28: 8037965: NullPointerException in TextLayout.getBaselineFromGraphic() for JTextComponents
• d4d1fbc: 8282484: G1: Predicted old time in log always zero
• b1f935c: 8277055: Assert "missing inlining msg" with -XX:+PrintIntrinsics
• ... and 183 more: https://git.openjdk.java.net/jdk/compare/f07b8165231799383303e5c0755d07afd2feb7fd...master

Your commit was automatically rebased without conflicts.

[openjdk]

@aivanov-jdk @manukumarvs Pushed as commit 1581e3f.

💡 You may see a message that your pull request was closed with unmerged commits. This can be safely ignored.