Parsed test spec with 2 sessions

starting permutation: update2 insert1 c2 select1surprise c1
step update2: UPDATE colors SET is_active = true WHERE key = 1;
step insert1: 
    WITH t AS (
        INSERT INTO colors(key, color, is_active)
        VALUES(1, 'Brown', true), (2, 'Gray', true)
        ON CONFLICT (key) DO UPDATE
        SET color = EXCLUDED.color
        WHERE colors.is_active)
    SELECT * FROM colors ORDER BY key; <waiting ...>
step c2: COMMIT;
step insert1: <... completed>
key|color|is_active
---+-----+---------
  1|Red  |f        
  2|Green|f        
  3|Blue |f        
(3 rows)

step select1surprise: SELECT * FROM colors ORDER BY key;
key|color|is_active
---+-----+---------
  1|Brown|t        
  2|Green|f        
  3|Blue |f        
(3 rows)

step c1: COMMIT;