From 90595070ae0c8da489faf24f153b918d2879e759 Mon Sep 17 00:00:00 2001
From: gokcegrbl <gokcegrbl@hotmail.com>
Date: Fri, 31 May 2019 12:28:44 +0000
Subject: [PATCH] Added new method itervalues() to LRUCache and deprecated
 itervalue()

(Fixes pallets/jinja#999)
---
 jinja2/utils.py     |  9 +++++++++
 tests/test_utils.py | 21 +++++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/jinja2/utils.py b/jinja2/utils.py
index 538b7745..d13a81b2 100644
--- a/jinja2/utils.py
+++ b/jinja2/utils.py
@@ -11,6 +11,7 @@
 import re
 import json
 import errno
+import warnings
 from collections import deque
 from threading import Lock
 from jinja2._compat import text_type, string_types, implements_iterator, \
@@ -456,6 +457,14 @@ class LRUCache(object):
         return [x[1] for x in self.items()]
 
     def itervalue(self):
+        """Iterate over all values."""
+        warnings.warn(DeprecationWarning(
+            '"itervalue()" is deprecated and will be removed in version 2.12.'
+            + ' Use "itervalues()" instead.'
+        ), stacklevel=2)
+        return self.itervalues()
+
+    def itervalues(self):
         """Iterate over all values."""
         return iter(self.values())
 
diff --git a/tests/test_utils.py b/tests/test_utils.py
index f71c608e..91defc90 100644
--- a/tests/test_utils.py
+++ b/tests/test_utils.py
@@ -32,6 +32,27 @@ class TestLRUCache(object):
         assert len(d) == 3
         assert 'a' in d and 'c' in d and 'd' in d and 'b' not in d
 
+    def test_itervalue_deprecated(self):
+        cache = LRUCache(3)
+        cache["a"] = 1
+        cache["b"] = 2
+        with pytest.deprecated_call():
+            cache.itervalue()
+
+    def test_itervalues(self):
+        cache = LRUCache(3)
+        cache["b"] = 1
+        cache["a"] = 2
+        values = [v for v in cache.itervalues()]
+        assert len(values) == 2
+        assert 1 in values
+        assert 2 in values
+
+    def test_itervalues_empty(self):
+        cache = LRUCache(2)
+        values = [v for v in cache.itervalues()]
+        assert len(values) == 0
+
     def test_pickleable(self):
         cache = LRUCache(2)
         cache["foo"] = 42
-- 
2.47.2