[SPARK-25763] Use more `@contextmanager` to ensure clean-up each test.

• Type: Test
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.4.0
• Fix Version/s: 3.0.0
• Component/s: PySpark, SQL
• Assignee: Takuya Ueshin
• Reporter: Takuya Ueshin
• Created: 18/Oct/18 09:42
• Updated: 12/Dec/22 18:10
• Resolved: 18/Oct/18 16:33

Description

Currently each test in SQLTest in PySpark is not cleaned properly.
We should introduce and use more @contextmanager to be convenient to clean up the context properly.

Issue Links

• links to: [Github] Pull Request #22762 (ueshin)