GNOME.org
 

pygobject r850 - in trunk: . gio tests

Author: johan
Date: Thu Jul 24 21:38:50 2008
New Revision: 850
URL: http://svn.gnome.org/viewvc/pygobject?rev=850&view=rev

Log:
2008-07-24  Johan Dahlin  <johan gnome org>

    * gio/gfile.override:
    * gio/gfileenumerator.override:
    * gio/ginputstream.override:
    * gio/gio.defs:
    * gio/gio.override:
    * gio/goutputstream.override:
    * tests/test_gio.py:
    Wrap gio.File.copy, add tests and documentation.
    Rename PyGAsyncRequestNotify to PyGIONotify and reuse it.



Modified:
   trunk/ChangeLog
   trunk/gio/gfile.override
   trunk/gio/gfileenumerator.override
   trunk/gio/ginputstream.override
   trunk/gio/gio.defs
   trunk/gio/gio.override
   trunk/gio/goutputstream.override
   trunk/tests/test_gio.py

Modified: trunk/gio/gfile.override
==============================================================================
--- trunk/gio/gfile.override	(original)
+++ trunk/gio/gfile.override	Thu Jul 24 21:38:50 2008
@@ -1,4 +1,4 @@
-/* -*- Mode: C; c-basic-offset: 4 -*-
+%%/* -*- Mode: C; c-basic-offset: 4 -*-
  * pygobject - Python bindings for GObject
  * Copyright (C) 2008  Johan Dahlin
  *
@@ -20,6 +20,48 @@
  * USA
  */
 %%
+headers
+
+typedef struct {
+    PyObject *callback;
+    PyObject *data;
+} PyGFileProgressCallback;
+
+static void
+file_progress_callback_marshal(goffset current_num_bytes,
+			       goffset total_num_bytes,
+			       PyGIONotify *notify)
+{
+    PyObject *ret;
+    PyGILState_STATE state;
+    
+    state = pyg_gil_state_ensure();
+
+    if (notify->data)
+	ret = PyEval_CallFunction(notify->callback, "(kkO)",
+				  current_num_bytes,
+				  total_num_bytes,
+				  notify->data);
+    else
+	ret = PyObject_CallFunction(notify->callback, "(kk)", 
+				    current_num_bytes,
+				    total_num_bytes);
+
+    if (ret == NULL)
+      {
+	PyErr_Print();
+	PyErr_Clear();
+      }
+
+    Py_XDECREF(ret);
+
+    Py_DECREF(notify->callback);
+    Py_XDECREF(notify->data);
+    g_slice_free(PyGIONotify, notify);
+
+    pyg_gil_state_release(state);
+}
+%%
 define _install_file_meta
 static PyObject *
 _wrap__install_file_meta(PyObject *self, PyObject *args)
@@ -96,9 +138,9 @@
   int io_priority = G_PRIORITY_DEFAULT;
   PyGObject *pycancellable = NULL;
   GCancellable *cancellable;
-  PyGAsyncRequestNotify *notify;
+  PyGIONotify *notify;
   
-  notify = g_slice_new0(PyGAsyncRequestNotify);
+  notify = g_slice_new0(PyGIONotify);
 
   if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                    "O|iOO:File.read_async",
@@ -108,14 +150,14 @@
                                    &pycancellable,
                                    &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
   if (!PyCallable_Check(notify->callback))
     {
       PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
   Py_INCREF(notify->callback);
@@ -180,9 +222,9 @@
     static char *kwlist[] = { "callback", "cancellable", "user_data", NULL };
     GCancellable *cancellable;
     PyGObject *pycancellable = NULL;
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
   
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
     
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                      "O|OO:File.load_contents_async",
@@ -192,7 +234,7 @@
                                       &notify->data))
             
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
@@ -249,7 +291,7 @@
 {
     static char *kwlist[] = { "attributes", "flags", "callback",
 			      "io_priority", "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     char *attributes;
     PyObject *py_flags = NULL;
     int io_priority = G_PRIORITY_DEFAULT;
@@ -257,7 +299,7 @@
     GCancellable *cancellable = NULL;
     PyGObject *py_cancellable = NULL;
 
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				     "sO|OiOO:GFile.enumerate_children_async",
@@ -269,14 +311,14 @@
 				     &py_cancellable,
 				     &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);
@@ -309,14 +351,14 @@
 {
     static char *kwlist[] = { "callback", "flags", "mount_operation",
 			      "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     PyObject *py_flags = NULL;
     PyGObject *mount_operation;
     PyGObject *py_cancellable = NULL;
     GMountMountFlags flags = G_MOUNT_MOUNT_NONE;
     GCancellable *cancellable;
   
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
     
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                      "O!O|OOO:File.mount_mountable",
@@ -329,14 +371,14 @@
 				     &notify->data))
             
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);
@@ -368,13 +410,13 @@
 {
     static char *kwlist[] = { "callback", "flags",
 			      "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     PyObject *py_flags = NULL;
     PyGObject *py_cancellable = NULL;
     GMountMountFlags flags = G_MOUNT_MOUNT_NONE;
     GCancellable *cancellable;
   
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
     
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                      "O|OOO:File.unmount_mountable",
@@ -385,14 +427,14 @@
 				     &notify->data))
             
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);
@@ -423,14 +465,14 @@
 {
     static char *kwlist[] = { "callback", "flags", "mount_operation",
 			      "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     PyObject *py_flags = NULL;
     PyGObject *mount_operation;
     PyGObject *py_cancellable = NULL;
     GMountMountFlags flags = G_MOUNT_MOUNT_NONE;
     GCancellable *cancellable;
   
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
     
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                      "O!O|OOO:File.mount_enclosing_volume",
@@ -443,14 +485,14 @@
 				     &notify->data))
             
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);
@@ -473,7 +515,76 @@
     Py_INCREF(Py_None);
     return Py_None;
 }
+%%
+override g_file_copy kwargs
+static PyObject *
+_wrap_g_file_copy(PyGObject *self,
+		  PyObject *args,
+		  PyObject *kwargs)
+{
+    static char *kwlist[] = { "destination", "flags",
+			      "cancellable", "progress_callback",
+			      "user_data", NULL };
+    PyGIONotify *notify;
+    PyObject *py_flags = NULL;
+    PyGObject *destination = NULL;
+    PyGObject *py_cancellable = NULL;
+    GFileCopyFlags flags = G_FILE_COPY_NONE;
+    GCancellable *cancellable;
+    int ret;
+    GError *error = NULL;
+    GFileProgressCallback callback = NULL;
+    
+    notify = g_slice_new0(PyGIONotify);
+    
+    if (!PyArg_ParseTupleAndKeywords(args, kwargs,
+                                     "O!|OOOO:File.unmount_mountable",
+				     kwlist,
+				     &PyGFile_Type,
+				     &destination,
+				     &notify->callback,
+				     &py_flags,
+				     &py_cancellable,
+				     &notify->data))
+            
+    {
+      g_slice_free(PyGIONotify, notify);
+      return NULL;
+    }
 
+    if (notify->callback != NULL)
+    {
+	if (!PyCallable_Check(notify->callback))
+	{
+	    PyErr_SetString(PyExc_TypeError, "callback argument not callable");
+	    g_slice_free(PyGIONotify, notify);
+	    return NULL;
+	}
+	callback = (GFileProgressCallback)file_progress_callback_marshal;
+	Py_INCREF(notify->callback);
+    }
+    Py_XINCREF(notify->data);
+  
+    if (py_flags && pyg_flags_get_value(G_TYPE_FILE_COPY_FLAGS,
+					py_flags, (gpointer)&flags))
+        return NULL;
+
+    if (!pygio_check_cancellable(py_cancellable, &cancellable))
+        return NULL;
+
+    ret = g_file_copy(G_FILE(self->obj),
+		      G_FILE(destination->obj),
+		      flags,
+		      cancellable,
+		      callback,
+		      notify,
+		      &error);
+
+    if (pyg_error_check(&error))
+        return NULL;
+
+    return PyBool_FromLong(ret);
+}
 /* GFile.append_to_async */
 /* GFile.create_async */
 /* GFile.eject_mountable */
@@ -484,7 +595,6 @@
 /* GFile.set_attributes_async */
 /* GFile.set_display_name_async */
 /* GFile.load_partial_contents_async: No ArgType for GFileReadMoreCallback */
-/* GFile.copy: No ArgType for GFileProgressCallback */
 /* GFile.move: No ArgType for GFileProgressCallback */
 /* GFile.query_settable_attributes: No ArgType for GFileAttributeInfoList* */
 /* GFile.query_writable_namespaces: No ArgType for GFileAttributeInfoList* */

Modified: trunk/gio/gfileenumerator.override
==============================================================================
--- trunk/gio/gfileenumerator.override	(original)
+++ trunk/gio/gfileenumerator.override	Thu Jul 24 21:38:50 2008
@@ -61,13 +61,13 @@
 {
     static char *kwlist[] = { "num_files", "callback",
 			      "io_priority", "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     int num_files;
     int io_priority = G_PRIORITY_DEFAULT;
     GCancellable *cancellable = NULL;
     PyGObject *py_cancellable = NULL;
 
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
 
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				     "iO|iOO:GFileEnumerator.enumerate_children_async",
@@ -78,14 +78,14 @@
 				     &py_cancellable,
 				     &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);

Modified: trunk/gio/ginputstream.override
==============================================================================
--- trunk/gio/ginputstream.override	(original)
+++ trunk/gio/ginputstream.override	Thu Jul 24 21:38:50 2008
@@ -27,12 +27,12 @@
     PyObject *callback;
     PyObject *data;
     PyObject *buffer;
-} PyGAsyncRequestNotifyRead;
+} PyGIONotifyRead;
 
 static void
 async_result_callback_marshal_read(GObject *source_object, 
 				   GAsyncResult *result, 
-				   PyGAsyncRequestNotifyRead *notify)
+				   PyGIONotifyRead *notify)
 {
     PyObject *ret;
     PyGILState_STATE state;
@@ -69,7 +69,7 @@
 
     Py_DECREF(notify->callback);
     Py_XDECREF(notify->data);
-    g_slice_free(PyGAsyncRequestNotifyRead, notify);
+    g_slice_free(PyGIONotifyRead, notify);
 
     pyg_gil_state_release(state);
 }
@@ -157,9 +157,9 @@
   int io_priority = G_PRIORITY_DEFAULT;
   PyGObject *pycancellable = NULL;
   GCancellable *cancellable;
-  PyGAsyncRequestNotifyRead *notify;
+  PyGIONotifyRead *notify;
 
-  notify = g_slice_new0(PyGAsyncRequestNotifyRead);
+  notify = g_slice_new0(PyGIONotifyRead);
 
   if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				   "lO|iOO:InputStream.read_async",
@@ -170,14 +170,14 @@
 				   &pycancellable,
 				   &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotifyRead, notify);
+      g_slice_free(PyGIONotifyRead, notify);
       return NULL;
     }
 
   if (!PyCallable_Check(notify->callback))
     {
       PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-      g_slice_free(PyGAsyncRequestNotifyRead, notify);
+      g_slice_free(PyGIONotifyRead, notify);
       return NULL;
     }
   Py_INCREF(notify->callback);
@@ -245,9 +245,9 @@
   int io_priority = G_PRIORITY_DEFAULT;
   PyGObject *pycancellable = NULL;
   GCancellable *cancellable;
-  PyGAsyncRequestNotify *notify;
+  PyGIONotify *notify;
 
-  notify = g_slice_new0(PyGAsyncRequestNotify);
+  notify = g_slice_new0(PyGIONotify);
 
   if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				   "O|iOO:InputStream.close_async",
@@ -257,14 +257,14 @@
 				   &pycancellable,
 				   &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
   if (!PyCallable_Check(notify->callback))
     {
       PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
   Py_INCREF(notify->callback);

Modified: trunk/gio/gio.defs
==============================================================================
--- trunk/gio/gio.defs	(original)
+++ trunk/gio/gio.defs	Thu Jul 24 21:38:50 2008
@@ -1645,6 +1645,44 @@
 )
 
 (define-method copy
+  (docstring
+"Copies the file source to the location specified by destination.\n"
+"Can not handle recursive copies of directories.\n"
+"\n"
+"If the flag gio.FILE_COPY_OVERWRITE is specified an already existing\n"
+"destination file is overwritten.\n"
+"\n"
+"If the flag gio.FILE_COPY_NOFOLLOW_SYMLINKS is specified then symlink\n"
+"will be copied as symlinks, otherwise the target of the source symlink\n"
+"will be copied.\n"
+"\n"
+"If cancellable is not None, then the operation can be cancelled b\n"
+"triggering the cancellable object from another thread.\n"
+"If the operation was cancelled, the error gio.ERROR_CANCELLED\n"
+"will be returned.\n"
+"\n"
+"If progress_callback is not None, then the operation can be monitored\n"
+"by setting this to a callable. if specified progress_callback_data will\n"
+"be passed to this function. It is guaranteed that this callback\n"
+"will be called after all data has been transferred with the total number\n"
+"of bytes copied during the operation.\n"
+"\n"
+"If the source file does not exist then the gio.ERROR_NOT_FOUND\n"
+"error is returned, independent on the status of the destination.\n"
+"\n"
+"If gio.FILE_COPY_OVERWRITE is not specified and the target exists\n"
+"then the error gio.ERROR_EXISTS is returned.\n"
+"\n"
+"If trying to overwrite a file over a directory the gio.ERROR_IS_DIRECTORY\n"
+"error is returned. If trying to overwrite a directory with a directory\n"
+"the gio.ERROR_WOULD_MERGE error is returned.\n"
+"\n"
+"If the source is a directory and the target does not exist\n"
+"or gio.FILE_COPY_OVERWRITE is specified and the target is a file\n"
+"then the gio.ERROR_WOULD_RECURSE error is returned.\n"
+"\n"
+"If you are interested in copying the GFile object itself\n"
+"(not the on-disk file), see gio.File.dup().")
   (of-object "GFile")
   (c-name "g_file_copy")
   (return-type "gboolean")

Modified: trunk/gio/gio.override
==============================================================================
--- trunk/gio/gio.override	(original)
+++ trunk/gio/gio.override	Thu Jul 24 21:38:50 2008
@@ -35,7 +35,7 @@
 typedef struct {
     PyObject *callback;
     PyObject *data;
-} PyGAsyncRequestNotify;
+} PyGIONotify;
 
 static void
 py_decref_callback (gpointer data)
@@ -46,7 +46,7 @@
 static void
 async_result_callback_marshal(GObject *source_object, 
 			      GAsyncResult *result, 
-			      PyGAsyncRequestNotify *notify)
+			      PyGIONotify *notify)
 {
     PyObject *ret;
     PyGILState_STATE state;
@@ -73,7 +73,7 @@
 
     Py_DECREF(notify->callback);
     Py_XDECREF(notify->data);
-    g_slice_free(PyGAsyncRequestNotify, notify);
+    g_slice_free(PyGIONotify, notify);
 
     pyg_gil_state_release(state);
 }
@@ -234,13 +234,13 @@
 {
     static char *kwlist[] = { "callback", "flags",
 			      "cancellable", "user_data", NULL };
-    PyGAsyncRequestNotify *notify;
+    PyGIONotify *notify;
     PyObject *py_flags = NULL;
     PyGObject *py_cancellable = NULL;
     GMountUnmountFlags flags = G_MOUNT_UNMOUNT_NONE;
     GCancellable *cancellable;
   
-    notify = g_slice_new0(PyGAsyncRequestNotify);
+    notify = g_slice_new0(PyGIONotify);
     
     if (!PyArg_ParseTupleAndKeywords(args, kwargs,
                                      "O|OOO:GMount.unmount",
@@ -251,14 +251,14 @@
 				     &notify->data))
             
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
     if (!PyCallable_Check(notify->callback))
     {
 	PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-	g_slice_free(PyGAsyncRequestNotify, notify);
+	g_slice_free(PyGIONotify, notify);
 	return NULL;
     }
     Py_INCREF(notify->callback);

Modified: trunk/gio/goutputstream.override
==============================================================================
--- trunk/gio/goutputstream.override	(original)
+++ trunk/gio/goutputstream.override	Thu Jul 24 21:38:50 2008
@@ -67,9 +67,9 @@
   int io_priority = G_PRIORITY_DEFAULT;
   PyGObject *pycancellable = NULL;
   GCancellable *cancellable;
-  PyGAsyncRequestNotify *notify;
+  PyGIONotify *notify;
 
-  notify = g_slice_new0(PyGAsyncRequestNotify);
+  notify = g_slice_new0(PyGIONotify);
 
   if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				   "s#O|iOO:OutputStream.write_async",
@@ -80,14 +80,14 @@
 				   &pycancellable,
 				   &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
   if (!PyCallable_Check(notify->callback))
     {
       PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
   Py_INCREF(notify->callback);
@@ -119,9 +119,9 @@
   int io_priority = G_PRIORITY_DEFAULT;
   PyGObject *pycancellable = NULL;
   GCancellable *cancellable;
-  PyGAsyncRequestNotify *notify;
+  PyGIONotify *notify;
 
-  notify = g_slice_new0(PyGAsyncRequestNotify);
+  notify = g_slice_new0(PyGIONotify);
 
   if (!PyArg_ParseTupleAndKeywords(args, kwargs,
 				   "O|iOO:OutputStream.close_async",
@@ -131,7 +131,7 @@
 				   &pycancellable,
 				   &notify->data))
     {
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
 
@@ -141,7 +141,7 @@
   if (!PyCallable_Check(notify->callback))
     {
       PyErr_SetString(PyExc_TypeError, "callback argument not callable");
-      g_slice_free(PyGAsyncRequestNotify, notify);
+      g_slice_free(PyGIONotify, notify);
       return NULL;
     }
   Py_INCREF(notify->callback);

Modified: trunk/tests/test_gio.py
==============================================================================
--- trunk/tests/test_gio.py	(original)
+++ trunk/tests/test_gio.py	Thu Jul 24 21:38:50 2008
@@ -124,6 +124,37 @@
         loop = gobject.MainLoop()
         loop.run()
 
+    def testCopy(self):
+        if os.path.exists('copy.txt'):
+            os.unlink("copy.txt")
+
+        source = gio.File('file.txt')
+        destination = gio.File('copy.txt')
+        try:
+            retval = source.copy(destination)
+            self.failUnless(retval)
+
+            self.failUnless(os.path.exists('copy.txt'))
+            self.assertEqual(open('file.txt').read(),
+                             open('copy.txt').read())
+        finally:
+            os.unlink("copy.txt")
+
+        self.called = False
+        def callback(current, total):
+            self.called = True
+        source = gio.File('file.txt')
+        destination = gio.File('copy.txt')
+        try:
+            retval = source.copy(destination, callback)
+            self.failUnless(retval)
+
+            self.failUnless(os.path.exists('copy.txt'))
+            self.assertEqual(open('file.txt').read(),
+                             open('copy.txt').read())
+            self.failUnless(self.called)
+        finally:
+            os.unlink("copy.txt")
 
 class TestGFileEnumerator(unittest.TestCase):
     def setUp(self):
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