From abb7e6504291506fee695ad56a642d0dea6370e4 Mon Sep 17 00:00:00 2001
From: Serhiy Storchaka <storchaka@gmail.com>
Date: Thu, 16 Apr 2015 11:56:35 +0300
Subject: Backported tests from issue #20175.

---
 Lib/test/test_fileio.py | 15 ++++++++++++---
 Lib/test/test_io.py     | 11 +++++++++++
 2 files changed, 23 insertions(+), 3 deletions(-)

diff --git a/Lib/test/test_fileio.py b/Lib/test/test_fileio.py
index b45d79b..e21e47f 100644
--- a/Lib/test/test_fileio.py
+++ b/Lib/test/test_fileio.py
@@ -125,9 +125,9 @@ class AutoFileTests(unittest.TestCase):
         self.assertTrue(f.closed)
 
     def testMethods(self):
-        methods = ['fileno', 'isatty', 'read', 'readinto',
-                   'seek', 'tell', 'truncate', 'write', 'seekable',
-                   'readable', 'writable']
+        methods = ['fileno', 'isatty', 'seekable', 'readable', 'writable',
+                   'read', 'readall', 'readline', 'readlines',
+                   'tell', 'truncate', 'flush']
         if sys.platform.startswith('atheos'):
             methods.remove('truncate')
 
@@ -139,6 +139,15 @@ class AutoFileTests(unittest.TestCase):
             # should raise on closed file
             self.assertRaises(ValueError, method)
 
+        self.assertRaises(ValueError, self.f.readinto) # XXX should be TypeError?
+        self.assertRaises(ValueError, self.f.readinto, bytearray(1))
+        self.assertRaises(ValueError, self.f.seek)
+        self.assertRaises(ValueError, self.f.seek, 0)
+        self.assertRaises(ValueError, self.f.write)
+        self.assertRaises(ValueError, self.f.write, b'')
+        self.assertRaises(TypeError, self.f.writelines)
+        self.assertRaises(ValueError, self.f.writelines, b'')
+
     def testOpendir(self):
         # Issue 3703: opening a directory should fill the errno
         # Windows always returns "[Errno 13]: Permission denied
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 2914a80..bbc804b 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -1990,6 +1990,17 @@ class TextIOWrapperTest(unittest.TestCase):
         self.assertRaises(TypeError, t.__init__, b, newline=42)
         self.assertRaises(ValueError, t.__init__, b, newline='xyzzy')
 
+    def test_uninitialized(self):
+        t = self.TextIOWrapper.__new__(self.TextIOWrapper)
+        del t
+        t = self.TextIOWrapper.__new__(self.TextIOWrapper)
+        self.assertRaises(Exception, repr, t)
+        self.assertRaisesRegexp((ValueError, AttributeError),
+                                'uninitialized|has no attribute',
+                                t.read, 0)
+        t.__init__(self.MockRawIO())
+        self.assertEqual(t.read(0), u'')
+
     def test_detach(self):
         r = self.BytesIO()
         b = self.BufferedWriter(r)
-- 
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