Mark module as as "freethreading_compatible" and test it.

Author: scoder

CHANGES.rst

@@ -4,6 +4,8 @@ ChangeLog
 1.20 (2025-??-??)
 -----------------
 
+* ``quicktions`` is compatible with freethreading Python (3.13+).
+
 * Accept leading zeros in precision/width for Fraction's formatting, following
   https://github.com/python/cpython/pull/130663
 

src/quicktions.pyx

@@ -1,5 +1,6 @@
 # cython: language_level=3
 ## cython: profile=True
+# cython: freethreading_compatible=True
 
 # Copyright (c) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 # 2011, 2012, 2013, 2014 Python Software Foundation; All Rights Reserved

src/test_fractions.py

@@ -2007,15 +2007,15 @@ def _gen_fuzzer_values():
 
 
 class FuzzerTest(unittest.TestCase):
-    def test_fuzzing_equal(self):
+    def test_fuzzing_equal(self, _fuzzer_values=_fuzzer_values):
         Fraction = fractions.Fraction
         for n, d in itertools.combinations(_fuzzer_values, 2):
             f = Fraction(n, d)
             q = F(n, d)
             self.assertEqual(f, q, "Fraction(%d, %d) == %r != %r == Quicktion(%d, %d)" % (
                 n, d, f, q, n, d))
 
-    def test_fuzzing_arithmetic(self):
+    def test_fuzzing_arithmetic(self, _fuzzer_values=_fuzzer_values):
         try:
             _gcd = math.gcd
         except AttributeError:
@@ -2056,6 +2056,26 @@ def compare(q, nom, denom):
             compare(q2 / q1, n_d1, n_d2)
             compare(q1 / q3, n_d2, n3_d1)
 
+    def test_threading(self):
+        import threading
+        num_threads = 8
+        start = threading.Barrier(num_threads)
+
+        def run_test(tid):
+            fuzzer_values = _fuzzer_values[tid::num_threads // 2]
+            start.wait()
+            self.test_fuzzing_equal(fuzzer_values)
+            self.test_fuzzing_arithmetic(fuzzer_values)
+
+        threads = [
+            threading.Thread(target=run_test, args=(i,))
+            for i in range(num_threads)
+        ]
+        for thread in threads:
+            thread.start()
+        for thread in threads:
+            thread.join()
+
 
 def test_main():
     suite = unittest.TestSuite()