-- minLength validation
-- longer is valid
SELECT is_jsonb_valid('{"minLength":2}', '"foo"');
 is_jsonb_valid 
----------------
 t
(1 row)

-- exact length is valid
SELECT is_jsonb_valid('{"minLength":2}', '"fo"');
 is_jsonb_valid 
----------------
 t
(1 row)

-- too short is invalid
SELECT is_jsonb_valid('{"minLength":2}', '"f"');
 is_jsonb_valid 
----------------
 f
(1 row)

-- ignores non-strings
SELECT is_jsonb_valid('{"minLength":2}', '1');
 is_jsonb_valid 
----------------
 t
(1 row)

-- one supplementary Unicode code point is not long enough
SELECT is_jsonb_valid('{"minLength":2}', '"💩"');
 is_jsonb_valid 
----------------
 f
(1 row)