#coding:utf-8

"""
ID:          issue-5750
ISSUE:       5750
TITLE:       SUBSTRING startposition smaller than 1 should be allowed
DESCRIPTION:
  Test is based on ticket samples, plus similar checks for non-ascii strings.
JIRA:        CORE-5480
FBTEST:      bugs.core_5480
"""

import pytest
from firebird.qa import *

db = db_factory()

test_script = """
    set list on;

    -- ASCII string tests:
    select '|'  || substring('abcdef' from 0) || '|'         a01 from rdb$database; -- Expected result: 'abcdef'
    select '|'  || substring('abcdef' from 0 for 2) || '|'   a02 from rdb$database; --Expected result: 'a' (and NOT 'ab')
    select '|'  || substring('abcdef' from -5 for 2) || '|'  a03 from rdb$database; --Expected result: ''
    select '|'  || substring('abcdef' from -1 for 3) || '|'  a04 from rdb$database; --Expected result: 'a'
    select '|'  || substring('abcdef' from -2 for 5) || '|'  a05 from rdb$database; --Expected result: 'ab'
    select '|'  || substring('abcdef' from -2147483645 for 2147483647) || '|'  a06 from rdb$database;  -- added case with big values for arguments

    -- multi-byte string tests:
    -- Euro sign (requires three bytes for encoding) concatenated
    -- with letters from Danish, German & Iceland alphabets:
    select '|'  || substring('€åßðéæø' from 0) || '|'        n01 from rdb$database;
    select '|'  || substring('€åßðéæø' from 0 for 2) || '|'  n02 from rdb$database;
    select '|'  || substring('€åßðéæø' from -5 for 2) || '|' n03 from rdb$database;
    select '|'  || substring('€åßðéæø' from -1 for 3) || '|' n04 from rdb$database;
    select '|'  || substring('€åßðéæø' from -2 for 5) || '|' n05 from rdb$database;
    select '|'  || substring('€åßðéæø' from -2147483645 for 2147483647) || '|' n06 from rdb$database;

"""

act = isql_act('db', test_script)

expected_stdout = """
    A01                             |abcdef|
    A02                             |a|
    A03                             ||
    A04                             |a|
    A05                             |ab|
    A06                             |a|

    N01                             |€åßðéæø|
    N02                             |€|
    N03                             ||
    N04                             |€|
    N05                             |ی|
    N06                             |€|
"""

@pytest.mark.intl
@pytest.mark.version('>=4.0')
def test_1(act: Action):
    act.expected_stdout = expected_stdout
    act.execute(charset='utf8')
    assert act.clean_stdout == act.clean_expected_stdout