[SPARK-46134] Replace `df.take(1).toSeq(0)` with `df.first()` in `ProtobufFunctionsSuite`

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 4.0.0
• Component/s: Protobuf, Tests
• Labels: pull-request-available
• Assignee: Yang Jie
• Reporter: Yang Jie
• Created: 28/Nov/23 07:06
• Updated: 28/Nov/23 19:36
• Resolved: 28/Nov/23 19:36

Description

In `ProtobufFunctionsSuite`, there are some cases where `df.take(1).toSeq(0)` is used to get the first row in the DataFrame. This can be achieved by using the `.first()` API, which looks clearer and more concise.

Issue Links

• links to: GitHub Pull Request #44048