Added/Updated tests\bugs\gh_7715_test.py: Checked on 6.0.0.65 -- all fine.

tests/bugs/gh_7715_test.py

@@ -0,0 +1,49 @@
+#coding:utf-8
+
+"""
+ID:          issue-7715
+ISSUE:       https://github.com/FirebirdSQL/firebird/issues/7715
+TITLE:       Alternative String Literals and multibyte (UTF8) alternatives
+DESCRIPTION: 
+NOTES:
+    [02.10.2023] pzotov
+    Confirmed bug on 5.0.0.1235 ("token unknown").
+    Checked on 6.0.0.65 -- all fine.
+"""
+
+import pytest
+from firebird.qa import *
+
+db = db_factory(charset = 'utf8')
+act = python_act('db')
+
+@pytest.mark.version('>=6.0')
+def test_1(act: Action, capsys):
+
+    with act.db.connect(charset = 'utf8') as con:
+        cur = con.cursor()
+        cur.execute("select q'ΔΛορεμ ιπσθμ δολορ σιτ αμετΔ' from rdb$database")
+        for r in cur:
+            print(r[0])
+
+    with act.db.connect(charset = 'win1251') as con:
+        cur = con.cursor()
+        cur.execute("select q'ЁЛорем ипсум долор сит аметЁ' from rdb$database")
+        for r in cur:
+            print(r[0])
+
+
+    with act.db.connect(charset = 'win1250') as con:
+        cur = con.cursor()
+        cur.execute("select q'ŰLórum ipse mint süke kenző títékerŰ' from rdb$database")
+        for r in cur:
+            print(r[0])
+
+    act.expected_stdout = """
+        Λορεμ ιπσθμ δολορ σιτ αμετ
+        Лорем ипсум долор сит амет
+        Lórum ipse mint süke kenző títéker
+    """
+    act.stdout = capsys.readouterr().out
+    assert act.clean_stdout == act.clean_expected_stdout
+    act.reset()