Update test_deque from CPython 3.10.5

Author: CPython developers

Lib/test/test_deque.py

@@ -1,7 +1,6 @@
 from collections import deque
 import unittest
 from test import support, seq_tests
-from test.support import os_helper
 import gc
 import weakref
 import copy
@@ -67,28 +66,9 @@ def test_maxlen(self):
         self.assertEqual(list(d), [7, 8, 9])
         d = deque(range(200), maxlen=10)
         d.append(d)
-        os_helper.unlink(os_helper.TESTFN)
-        fo = open(os_helper.TESTFN, "w")
-        try:
-            fo.write(str(d))
-            fo.close()
-            fo = open(os_helper.TESTFN, "r")
-            self.assertEqual(fo.read(), repr(d))
-        finally:
-            fo.close()
-            os_helper.unlink(os_helper.TESTFN)
-
+        self.assertEqual(repr(d)[-30:], ', 198, 199, [...]], maxlen=10)')
         d = deque(range(10), maxlen=None)
         self.assertEqual(repr(d), 'deque([0, 1, 2, 3, 4, 5, 6, 7, 8, 9])')
-        fo = open(os_helper.TESTFN, "w")
-        try:
-            fo.write(str(d))
-            fo.close()
-            fo = open(os_helper.TESTFN, "r")
-            self.assertEqual(fo.read(), repr(d))
-        finally:
-            fo.close()
-            os_helper.unlink(os_helper.TESTFN)
 
     def test_maxlen_zero(self):
         it = iter(range(100))
@@ -149,7 +129,8 @@ def __eq__(self, other):
         self.assertEqual(d.count(None), 16)
 
     def test_comparisons(self):
-        d = deque('xabc'); d.popleft()
+        d = deque('xabc')
+        d.popleft()
         for e in [d, deque('abc'), deque('ab'), deque(), list(d)]:
             self.assertEqual(d==e, type(d)==type(e) and list(d)==list(e))
             self.assertEqual(d!=e, not(type(d)==type(e) and list(d)==list(e)))
@@ -184,6 +165,18 @@ def test_contains(self):
         with self.assertRaises(RuntimeError):
             n in d
 
+    def test_contains_count_stop_crashes(self):
+        class A:
+            def __eq__(self, other):
+                d.clear()
+                return NotImplemented
+        d = deque([A(), A()])
+        with self.assertRaises(RuntimeError):
+            _ = 3 in d
+        d = deque([A(), A()])
+        with self.assertRaises(RuntimeError):
+            _ = d.count(3)
+
     def test_extend(self):
         d = deque('a')
         self.assertRaises(TypeError, d.extend, 1)
@@ -534,25 +527,11 @@ def test_repr(self):
         e = eval(repr(d))
         self.assertEqual(list(d), list(e))
         d.append(d)
-        self.assertIn('...', repr(d))
-
-    def test_print(self):
-        d = deque(range(200))
-        d.append(d)
-        try:
-            os_helper.unlink(os_helper.TESTFN)
-            fo = open(os_helper.TESTFN, "w")
-            print(d, file=fo, end='')
-            fo.close()
-            fo = open(os_helper.TESTFN, "r")
-            self.assertEqual(fo.read(), repr(d))
-        finally:
-            fo.close()
-            os_helper.unlink(os_helper.TESTFN)
+        self.assertEqual(repr(d)[-20:], '7, 198, 199, [...]])')
 
     def test_init(self):
-        self.assertRaises(TypeError, deque, 'abc', 2, 3);
-        self.assertRaises(TypeError, deque, 1);
+        self.assertRaises(TypeError, deque, 'abc', 2, 3)
+        self.assertRaises(TypeError, deque, 1)
 
     def test_hash(self):
         self.assertRaises(TypeError, hash, deque('abc'))
@@ -894,6 +873,7 @@ def test_weakref(self):
         p = weakref.proxy(d)
         self.assertEqual(str(p), str(d))
         d = None
+        support.gc_collect()  # For PyPy or other GCs.
         self.assertRaises(ReferenceError, str, p)
 
     def test_strange_subclass(self):