[pypy-commit] pypy default: a failing test, and the simplest possible fix

[mattip]

Author: Matti Picus <matti.picus at gmail.com>
Branch: 
Changeset: r70348:7ccee921d146
Date: 2014-03-31 15:30 +0300
http://bitbucket.org/pypy/pypy/changeset/7ccee921d146/

Log:	a failing test, and the simplest possible fix

diff --git a/pypy/module/_file/test/test_file.py b/pypy/module/_file/test/test_file.py
--- a/pypy/module/_file/test/test_file.py
+++ b/pypy/module/_file/test/test_file.py
@@ -254,6 +254,13 @@
         if '__pypy__' in sys.builtin_module_names:
             assert repr(self.temppath) in g.getvalue()
 
+    def test_truncate(self):
+        f = self.file(self.temppath, "w")
+        f.write("foo")
+        f.close()
+        with self.file(self.temppath, 'r') as f:
+            raises(IOError, f.truncate, 100)
+
 
 class AppTestNonblocking(object):
     def setup_class(cls):
diff --git a/rpython/rlib/streamio.py b/rpython/rlib/streamio.py
--- a/rpython/rlib/streamio.py
+++ b/rpython/rlib/streamio.py
@@ -193,7 +193,7 @@
             # Truncate.  Note that this may grow the file!
             handle = get_osfhandle(fd)
             if not SetEndOfFile(handle):
-                raise WindowsError(GetLastError(),
+                raise OSError(GetLastError(),
                                    "Could not truncate file")
         finally:
             # we restore the file pointer position in any case