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Issue #17128: Fix trailing comments vertical alignment in indentation…#18586

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romani merged 1 commit into
checkstyle:masterfrom
Anushreebasics:test/trailing-comments-vertical-alignment
Jan 25, 2026
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Issue #17128: Fix trailing comments vertical alignment in indentation…#18586
romani merged 1 commit into
checkstyle:masterfrom
Anushreebasics:test/trailing-comments-vertical-alignment

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@Anushreebasics

@Anushreebasics Anushreebasics commented Jan 10, 2026 •
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Issue #17128
fixes #17128

This PR implements a comprehensive test to ensure that trailing comments (//indent:) are vertically aligned in all indentation test input files, and fixes any misalignments.

Problem

The issue requested a test to verify that trailing comments in indentation input files are vertically aligned (start at the same column). Previously, the test only checked against the first comment found, and had an ALLOWED_VIOLATION_FILES set containing 14 files that were not aligned due to line length concerns.

Solution

  • Enhanced the test logic: Modified IndentationTrailingCommentsVerticalAlignmentTest to find the rightmost trailing comment position in each file and ensure all comments align to that position.
  • Fixed all input files: Updated all indentation test files to have vertically aligned //indent: comments by adding appropriate spaces.
  • Removed violations list: Eliminated the ALLOWED_VIOLATION_FILES set since all files now pass the alignment check.
  • Improved test coverage: The test now runs on all indentation input files without exceptions.

Changes

Notes

The line length check does not apply to test input files, so alignment was possible without violating any length constraints. All comments are now visually aligned to the rightmost position in each file.

@romani please review this PR

Copilot AI review requested due to automatic review settings January 10, 2026 08:30
Copilot AI reviewed Jan 10, 2026

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Copilot encountered an error and was unable to review this pull request. You can try again by re-requesting a review.

@romani

romani commented Jan 11, 2026

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Please read and watch videos at Starting_Development.
Please make CI green.

romani
romani requested changes Jan 11, 2026
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Items

Comment thread ...t/java/com/puppycrawl/tools/checkstyle/IndentationTrailingCommentsVerticalAlignmentTest.java Outdated
private static final int TAB_WIDTH = 4;

private static final Set<String> ALLOWED_VIOLATION_FILES = Set.of(
// reason: checkstyle check: Line gets longer than 100 characters

@romani romani Jan 11, 2026

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All long lines should be wrapped

@Anushreebasics

Anushreebasics commented Jan 12, 2026

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@romani, I have tried multiple times to make the CI green, but it is failing. Could you please help me?
mvn clean verify is building successfully. Is there something else that I should check?

@romani

romani commented Jan 12, 2026

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[ERROR] [checkstyle] [ERROR] C:\projects\checkstyle\src\test\resources\com\puppycrawl\tools\checkstyle\checks\indentation\indentation\InputIndentationCorrectIfAndParameter1.java:38: Line should not be longer than 100 symbols [lineLength]

You should be able to wrap code.

@romani

romani commented Jan 18, 2026

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single commit please, and make sure "mvn clean verify" passing on your local

@Anushreebasics Anushreebasics force-pushed the test/trailing-comments-vertical-alignment branch 3 times, most recently from 6dd8c3f to 73f2820 Compare January 20, 2026 07:57
@Anushreebasics

Anushreebasics commented Jan 20, 2026

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@romani please review the changes,
CI tests were failing because line length was very long for these file so in [checkstyle-non-main-files-suppressions.xml], I added a note and suppression entry so the indentation input resources under [src/test/resources/.../indentation/] are exempt from the lineLength check, since those files intentionally use long aligned trailing comments.

@Anushreebasics Anushreebasics force-pushed the test/trailing-comments-vertical-alignment branch 2 times, most recently from c3c52cf to fc9d281 Compare January 20, 2026 08:53
romani
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items:

Comment thread config/checkstyle-non-main-files-suppressions.xml Outdated
Comment thread ...t/java/com/puppycrawl/tools/checkstyle/IndentationTrailingCommentsVerticalAlignmentTest.java Outdated
@Anushreebasics Anushreebasics force-pushed the test/trailing-comments-vertical-alignment branch 3 times, most recently from 7c1f054 to cf92195 Compare January 25, 2026 08:16
@Anushreebasics

Anushreebasics commented Jan 25, 2026

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@romani please review

@Anushreebasics Anushreebasics requested a review from romani January 25, 2026 08:56
@romani romani force-pushed the test/trailing-comments-vertical-alignment branch from cf92195 to 73f53be Compare January 25, 2026 13:52
romani
romani approved these changes Jan 25, 2026
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Comment thread config/checkstyle-non-main-files-suppressions.xml
files="src[\\/]test[\\/]resources[\\/].*[\\/]abstractjavadoc[\\/]InputAbstractJavadocLeaveToken.*\.java"/>
<!-- Indentation inputs align trailing comments and can exceed the line length limit. -->
<suppress id="lineLength"
files="src[\\/]test[\\/]resources[\\/].*[\\/]indentation[\\/]indentation[\\/]InputIndentation.*\.java"/>

@romani romani Jan 25, 2026

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this should be fixed in next PR

@romani romani Jan 25, 2026

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@Anushreebasics , please send one more PR to fix this.
If we allow this, we could resolve this issue very quickly, but we need test to comply to read-ability rules.

@romani romani merged commit 227396d into checkstyle:master Jan 25, 2026
51 of 71 checks passed
@romani romani mentioned this pull request Jan 25, 2026
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test to check indentation trailing comments are vertically aligned

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