Parsed test spec with 2 sessions

starting permutation: s1b s2b s1s s2u s1l s2c s2d1 s1c
step s1b: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2b: BEGIN;
step s1s: SELECT * FROM foo;
key|value
---+-----
  1|    1
(1 row)

step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;
step s2d1: DELETE FROM foo WHERE key = 1; <waiting ...>
step s1c: COMMIT;
step s2d1: <... completed>

starting permutation: s1b s2b s1s s2u s1l s2c s2d2 s1c
step s1b: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2b: BEGIN;
step s1s: SELECT * FROM foo;
key|value
---+-----
  1|    1
(1 row)

step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;
step s2d2: UPDATE foo SET key = 3 WHERE key = 1; <waiting ...>
step s1c: COMMIT;
step s2d2: <... completed>

starting permutation: s1b s2b s1s s2u s1l s2c s2d3 s1c
step s1b: BEGIN ISOLATION LEVEL REPEATABLE READ;
step s2b: BEGIN;
step s1s: SELECT * FROM foo;
key|value
---+-----
  1|    1
(1 row)

step s2u: UPDATE foo SET value = 2 WHERE key = 1;
step s1l: SELECT * FROM foo FOR KEY SHARE;
key|value
---+-----
  1|    1
(1 row)

step s2c: COMMIT;
step s2d3: UPDATE foo SET value = 3 WHERE key = 1;
step s1c: COMMIT;