Added/Updated tests\bugs\gh_7108_test.py: Checked on 4.0.3.2904, 5.0.0.964.

tests/bugs/gh_7108_test.py

@@ -0,0 +1,48 @@
+#coding:utf-8
+
+"""
+ID:          issue-7108
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/7108
+TITLE:       Firebird does not find an record when adding a foreign key
+NOTES:
+    [01.03.2023] pzotov
+    Confirmed bug on 4.0.1.2701; fixed on 4.0.1.2711
+    Checked on 4.0.3.2904, 5.0.0.964.
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory()
+
+test_script = """
+    create table main (str varchar(1) character set utf8);
+    commit;
+
+    insert into main(str) values ('X');
+    commit;
+
+    create table ref (id varchar(1) character set utf8 not null primary key);
+    commit;
+
+    insert into ref(id) values ('1');
+    commit;
+
+    alter table main add ref_id varchar(1) character set utf8 default '1' not null;
+    commit;
+
+    alter table main add constraint FK_MAIN foreign key (ref_id) references ref (id);
+"""
+
+act = isql_act('db', test_script)
+
+""
+
+expected_stdout = """
+"""
+
+@pytest.mark.version('>=4.0.2')
+def test_1(act: Action):
+    act.expected_stdout = expected_stdout
+    act.execute(combine_output = True)
+    assert act.clean_stdout == act.clean_expected_stdout