1 files changed, 84 insertions, 0 deletions
diff --git a/comphelper/qa/python/test_sequence_output_stream.py b/comphelper/qa/python/test_sequence_output_stream.py
new file mode 100644
index 0000000000..6f1294960e
--- /dev/null
+++ b/comphelper/qa/python/test_sequence_output_stream.py
@@ -0,0 +1,84 @@
+#! /usr/bin/env python
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+import unittest
+import uno
+
+from org.libreoffice.unotest import UnoInProcess
+
+
+class TestSequenceOutputStream(unittest.TestCase):
+    """Test com.sun.star.io.SequenceOutputStream"""
+
+    @classmethod
+    def setUpClass(cls):
+        cls._uno = UnoInProcess()
+        cls._uno.setUp()
+
+    @classmethod
+    def tearDownClass(cls):
+        cls._uno.tearDown()
+
+    def setUp(self):
+        self.data = uno.ByteSequence(b"some data")
+        try:
+            self.service_manager = self._uno.getContext().getServiceManager()
+        except:
+            raise RuntimeError("Cannot create service factory!")
+        if self.service_manager is None:
+            raise RuntimeError("Cannot create service factory!")
+
+    def test_stream(self):
+        try:
+            seq_output_stream = self.service_manager.createInstance(
+                "com.sun.star.io.SequenceOutputStream"
+            )
+            seq_output_stream.writeBytes(self.data)
+
+            # Append the same content once again
+            seq_output_stream.writeBytes(self.data)
+
+            written_bytes = seq_output_stream.getWrittenBytes()
+
+            self.assertEqual(
+                len(self.data) * 2,
+                len(written_bytes),
+                "SequenceOutputStream::getWrittenBytes() - wrong amount of bytes returned",
+            )
+
+            # create SequenceInputstream
+            seq_input_stream = self.service_manager.createInstanceWithArguments(
+                "com.sun.star.io.SequenceInputStream", (written_bytes,)
+            )
+
+            # read from the stream
+            nbytes_read, read_bytes = seq_input_stream.readBytes(None, len(self.data) * 2 + 1)
+            self.assertEqual(
+                len(self.data) * 2,
+                nbytes_read,
+                "SequenceInputStream::readBytes() - "
+                f"wrong amount of bytes returned {len(self.data) * 2} vs {nbytes_read}",
+            )
+
+            # close the streams
+            seq_output_stream.closeOutput()
+            seq_input_stream.closeInput()
+
+            expected = uno.ByteSequence(self.data.value * 2)
+            self.assertEqual(expected, written_bytes, "Written array not identical to original.")
+            self.assertEqual(expected, read_bytes, "Read array not identical to original.")
+        except Exception as e:
+            self.fail(f"Exception: {e}")
+
+
+if __name__ == "__main__":
+    unittest.main()
+
+# vim: set shiftwidth=4 softtabstop=4 expandtab: