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Fix strings::contains matching end of string target #14711

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davidwendt
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Description

Fixes bug in cudf::strings::contains where the target matches the end of the string. This only occurred in the long strings special kernel logic for contains.
Also added additional gtests for long and short strings and for related functions find/rfind.

Closes #14710

Checklist

  • I am familiar with the Contributing Guidelines.
  • New or existing tests cover these changes.
  • The documentation is up to date with these changes.

@davidwendt davidwendt added bug Something isn't working 2 - In Progress Currently a work in progress libcudf Affects libcudf (C++/CUDA) code. strings strings issues (C++ and Python) non-breaking Non-breaking change labels Jan 4, 2024
@davidwendt davidwendt self-assigned this Jan 4, 2024
@davidwendt davidwendt added 3 - Ready for Review Ready for review by team and removed 2 - In Progress Currently a work in progress labels Jan 5, 2024
@davidwendt davidwendt marked this pull request as ready for review January 5, 2024 14:54
@davidwendt davidwendt requested a review from a team as a code owner January 5, 2024 14:54
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/merge

@rapids-bot rapids-bot bot merged commit 4de4aae into rapidsai:branch-24.02 Jan 5, 2024
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@davidwendt davidwendt deleted the fix-contains-end-match branch January 5, 2024 21:33
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3 - Ready for Review Ready for review by team bug Something isn't working libcudf Affects libcudf (C++/CUDA) code. non-breaking Non-breaking change strings strings issues (C++ and Python)
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Successfully merging this pull request may close these issues.

[BUG] strings::contains does not work if the input is large and the scalar search only matches at the end
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