[Job] Support DAG execution by replacing is_chain
with is_dag
check
#4186
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Replace
is_chain()
withis_dag()
check to:Enable future DAG execution support
Validate DAG structure before job launch
Originally posted by @cblmemo in #4128 (comment)
Tested (run the relevant ones):
bash format.sh
pytest tests/test_smoke.py
pytest tests/test_smoke.py::test_fill_in_the_name
conda deactivate; bash -i tests/backward_compatibility_tests.sh