[refactor] extracts tail logic into TruncatedTailPipe

1 files changed, 32 insertions, 0 deletions

diff --git a/testing/tests/pipes/test_pipes.py b/testing/tests/pipes/test_pipes.py
new file mode 100644
index 00000000..d7db2716
--- /dev/null
+++ b/testing/tests/pipes/test_pipes.py
@@ -0,0 +1,32 @@
+# -*- coding: utf-8 -*-
+# test_pipes.py
+# Copyright (C) 2017 LEAP
+#
+# 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 3 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, see <http://www.gnu.org/licenses/>.
+"""
+Tests for streaming components.
+"""
+from twisted.trial import unittest
+from leap.soledad.client._pipes import TruncatedTailPipe
+
+
+class TruncatedTailTestCase(unittest.TestCase):
+
+    def test_tail_truncating_pipe(self):
+        pipe = TruncatedTailPipe(tail_size=20)
+        payload = 'A' * 100 + 'B' * 20
+        for data in payload:
+            pipe.write(data)
+        result = pipe.close()
+        assert result.getvalue() == 'A' * 100