gh-114894: add array.array.clear() method (#114919)

Co-authored-by: blurb-it[bot] <43283697+blurb-it[bot]@users.noreply.github.com>
Co-authored-by: AN Long <aisk@users.noreply.github.com>
Co-authored-by: Jelle Zijlstra <jelle.zijlstra@gmail.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/Lib/test/test_array.py b/Lib/test/test_array.py
index a219fa365e7..95383be9659 100755
--- a/Lib/test/test_array.py
+++ b/Lib/test/test_array.py
@@ -1014,6 +1014,29 @@ class BaseTest:
             array.array(self.typecode, self.example[3:]+self.example[:-1])
         )
 
+    def test_clear(self):
+        a = array.array(self.typecode, self.example)
+        with self.assertRaises(TypeError):
+            a.clear(42)
+        a.clear()
+        self.assertEqual(len(a), 0)
+        self.assertEqual(a.typecode, self.typecode)
+
+        a = array.array(self.typecode)
+        a.clear()
+        self.assertEqual(len(a), 0)
+        self.assertEqual(a.typecode, self.typecode)
+
+        a = array.array(self.typecode, self.example)
+        a.clear()
+        a.append(self.example[2])
+        a.append(self.example[3])
+        self.assertEqual(a, array.array(self.typecode, self.example[2:4]))
+
+        with memoryview(a):
+            with self.assertRaises(BufferError):
+                a.clear()
+
     def test_reverse(self):
         a = array.array(self.typecode, self.example)
         self.assertRaises(TypeError, a.reverse, 42)