Is your feature request related to a problem? Please describe.
"SPARK_TESTING" variable, when it is set, may significantly increase the setUp of all Spark/PySpark tests. For example, when it set to "1", Spark UI initialization is disabled. A lot of other initializations are simplified too.
Describe the solution you'd like
All Spark/PySpark tests (except becnhmarks) are running with SPARK_TESTING=1
Is your feature request related to a problem? Please describe. "SPARK_TESTING" variable, when it is set, may significantly increase the setUp of all Spark/PySpark tests. For example, when it set to "1", Spark UI initialization is disabled. A lot of other initializations are simplified too.
Describe the solution you'd like All Spark/PySpark tests (except becnhmarks) are running with
SPARK_TESTING=1
Describe alternatives you've considered .
Additional context .