--- /dev/null
+#!/usr/bin/env python
+#
+# Copyright 2004,2007 Free Software Foundation, Inc.
+#
+# This file is part of GNU Radio
+#
+# GNU Radio 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, or (at your option)
+# any later version.
+#
+# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
+# the Free Software Foundation, Inc., 51 Franklin Street,
+# Boston, MA 02110-1301, USA.
+#
+
+from gnuradio import gr, gr_unittest
+import math
+
+class test_delay (gr_unittest.TestCase):
+
+ def setUp (self):
+ self.tb = gr.top_block ()
+
+ def tearDown (self):
+ self.tb = None
+
+ def test_000 (self):
+ delta_t = 0
+ tb = self.tb
+ src_data = [float(x) for x in range(0, 100)]
+ expected_result = tuple(delta_t*[0.0] + src_data)
+
+ src = gr.vector_source_f(src_data)
+ op = gr.delay(gr.sizeof_float, delta_t)
+ dst = gr.vector_sink_f ()
+
+ tb.connect (src, op, dst)
+ tb.run ()
+ dst_data = dst.data ()
+ self.assertEqual (expected_result, dst_data)
+
+ def test_010 (self):
+ delta_t = 10
+ tb = self.tb
+ src_data = [float(x) for x in range(0, 100)]
+ expected_result = tuple(delta_t*[0.0] + src_data[0:-delta_t])
+
+ src = gr.vector_source_f(src_data)
+ op = gr.delay(gr.sizeof_float, delta_t)
+ dst = gr.vector_sink_f ()
+
+ tb.connect (src, op, dst)
+ tb.run ()
+ dst_data = dst.data ()
+ self.assertEqual (expected_result, dst_data)
+
+if __name__ == '__main__':
+ gr_unittest.main ()