Fix several tests with resource leakage

[kaisun2000]

Issues

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fix #1226

Description

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Fix several tests with resource leakage

Tests

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  github run pending

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Commits

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  4. Subject uses the imperative mood ("add", not "adding")
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Code Quality

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[jiajunwang]

Please address the other comments.

[kaisun2000]

This PR is approved, please help to merge in.

Fix several tests with resource leakage