[FLINK-16258] Update test utilities to FLIP-65

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Table SQL / Planner
• Labels: auto-unassigned
• Assignee: Unassigned
• Reporter: Timo Walther
• Created: 24/Feb/20 15:09
• Updated: 27/Apr/21 22:56

Description

Currently, TestingTableEnvironment.registerFunction and TestingTableEnvironment.registerFunction are still using the old type system.

This means that most tests still work on the old type system and actually don't test real API user-facing behavior.