pythongh-129870: Skip test_dump_virtual_tables if SQLite lacks FTS4 support (python#129913)

Author: erlend-aasland

Lib/test/test_sqlite3/test_dump.py

@@ -4,6 +4,7 @@
 
 from .util import memory_database
 from .util import MemoryDatabaseMixin
+from .util import requires_virtual_table
 
 
 class DumpTests(MemoryDatabaseMixin, unittest.TestCase):
@@ -206,6 +207,7 @@ def dict_factory(cu, row):
         self.assertEqual(expected, actual)
         self.assertEqual(self.cx.row_factory, dict_factory)
 
+    @requires_virtual_table("fts4")
     def test_dump_virtual_tables(self):
         # gh-64662
         expected = [

Lib/test/test_sqlite3/util.py

@@ -4,6 +4,7 @@
 import re
 import sqlite3
 import test.support
+import unittest
 
 
 # Helper for temporary memory databases
@@ -79,3 +80,10 @@ def cx(self):
     @property
     def cu(self):
         return self.cur
+
+
+def requires_virtual_table(module):
+    with memory_database() as cx:
+        supported = (module,) in list(cx.execute("PRAGMA module_list"))
+        reason = f"Requires {module!r} virtual table support"
+        return unittest.skipUnless(supported, reason)