Parsed test spec with 4 sessions

starting permutation: s2_query s1_wp_enable s2_query s1_drop_chunks s1_wp_release s2_show_num_chunks
step s2_query: SELECT * FROM measurements ORDER BY 1;
time                        |device|temp
----------------------------+------+----
Fri Jan 03 10:30:00 2020 PST|     1|   1
Sun Jan 03 10:30:00 2021 PST|     2|   2

step s1_wp_enable: SELECT debug_waitpoint_enable('hypertable_expansion_before_lock_chunk');
debug_waitpoint_enable
----------------------
                      

step s2_query: SELECT * FROM measurements ORDER BY 1; <waiting ...>
step s1_drop_chunks: SELECT count(*) FROM drop_chunks('measurements', TIMESTAMPTZ '2020-03-01');
count
-----
    1

step s1_wp_release: SELECT debug_waitpoint_release('hypertable_expansion_before_lock_chunk');
debug_waitpoint_release
-----------------------
                       

step s2_query: <... completed>
time                        |device|temp
----------------------------+------+----
Sun Jan 03 10:30:00 2021 PST|     2|   2

step s2_show_num_chunks: SELECT count(*) FROM show_chunks('measurements') ORDER BY 1;
count
-----
    1


starting permutation: s3_wp_enable s4_hypertable_size s3_drop_chunks s3_wp_release
step s3_wp_enable: SELECT debug_waitpoint_enable('relation_size_before_lock');
debug_waitpoint_enable
----------------------
                      

step s4_hypertable_size: SELECT count(*) FROM hypertable_size('measurements'); <waiting ...>
step s3_drop_chunks: SELECT count(*) FROM drop_chunks('measurements', TIMESTAMPTZ '2020-03-01');
count
-----
    1

step s3_wp_release: SELECT debug_waitpoint_release('relation_size_before_lock');
debug_waitpoint_release
-----------------------
                       

step s4_hypertable_size: <... completed>
count
-----
    1

