From 5bdf1e49985408ef9898260733f5dd8ddf2673c0 Mon Sep 17 00:00:00 2001
From: Marcus Brinkmann <m.brinkmann@semantics.de>
Date: Thu, 17 Nov 2016 13:43:11 +0100
Subject: [PATCH] Test for libtiff, n_frames and seek.

---
 Tests/test_file_libtiff.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
index 7839c4053..2bd289fa9 100644
--- a/Tests/test_file_libtiff.py
+++ b/Tests/test_file_libtiff.py
@@ -401,6 +401,19 @@ class TestFileLibTiff(LibTiffTestCase):
 
         TiffImagePlugin.READ_LIBTIFF = False
 
+    def test_multipage_nframes(self):
+        # issue #862
+        TiffImagePlugin.READ_LIBTIFF = True
+        im = Image.open('Tests/images/multipage.tiff')
+        frames = im.n_frames
+        self.assertEqual(frames, 3)
+        for idx in range(frames):
+            im.seek(0)
+            # Should not raise ValueError: I/O operation on closed file
+            im.load()
+
+        TiffImagePlugin.READ_LIBTIFF = False
+
     def test__next(self):
         TiffImagePlugin.READ_LIBTIFF = True
         im = Image.open('Tests/images/hopper.tif')