1 files changed, 47 insertions, 0 deletions
diff --git a/bzrlib/tests/file_utils.py b/bzrlib/tests/file_utils.py
new file mode 100644
index 0000000..ea6b870
--- /dev/null
+++ b/bzrlib/tests/file_utils.py
@@ -0,0 +1,47 @@
+# Copyright (C) 2008 Canonical Ltd
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+from cStringIO import StringIO
+
+class FakeReadFile(object):
+    """A file-like object that can be given predefined content and read
+    like a file.  The maximum size and number of the reads is recorded."""
+
+    def __init__(self, data):
+        """Initialize the mock file object with the provided data."""
+        self.data = StringIO(data)
+        self.max_read_size = None
+        self.read_count = 0
+
+    def read(self, size=-1):
+        """Reads size characters from the input (or the rest of the string if
+        size is -1)."""
+        data = self.data.read(size)
+        self.max_read_size = max(self.max_read_size, len(data))
+        self.read_count += 1
+        return data
+
+    def get_max_read_size(self):
+        """Returns the maximum read size or None if no reads have occured."""
+        return self.max_read_size
+
+    def get_read_count(self):
+        """Returns the number of calls to read."""
+        return self.read_count
+
+    def reset_read_count(self):
+        """Clears the read count."""
+        self.read_count = 0