From ee76a565c341fda903466e1a34d0a8d0b52391b3 Mon Sep 17 00:00:00 2001
From: Georg Brandl <georg@python.org>
Date: Mon, 14 Aug 2006 21:45:35 +0000
Subject: [PATCH] Add an additional test: BZ2File write methods should raise
 IOError when file is read-only.  (backport from rev. 51287)

---
 Lib/test/test_bz2.py | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
index 4e033942f9d4..c3a4f91f39ac 100644
--- a/Lib/test/test_bz2.py
+++ b/Lib/test/test_bz2.py
@@ -172,6 +172,15 @@ class BZ2FileTest(BaseTest):
         self.assertEqual(self.decompress(f.read()), self.TEXT)
         f.close()
 
+    def testWriteMethodsOnReadOnlyFile(self):
+        bz2f = BZ2File(self.filename, "w")
+        bz2f.write("abc")
+        bz2f.close()
+
+        bz2f = BZ2File(self.filename, "r")
+        self.assertRaises(IOError, bz2f.write, "a")
+        self.assertRaises(IOError, bz2f.writelines, ["a"])
+
     def testSeekForward(self):
         # "Test BZ2File.seek(150, 0)"
         self.createTempFile()
-- 
2.47.3