1 files changed, 79 insertions, 0 deletions
diff --git a/gr-analog/python/qa_rail_ff.py b/gr-analog/python/qa_rail_ff.py
new file mode 100755
index 000000000..5bcf01c6b
--- /dev/null
+++ b/gr-analog/python/qa_rail_ff.py
@@ -0,0 +1,79 @@
+#!/usr/bin/env python
+#
+# Copyright 2012 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 analog_swig as analog
+
+def clip(x, lo, hi):
+    if(x < lo):
+        return lo
+    elif(x > hi):
+        return hi
+    else:
+        return x
+
+class test_rail(gr_unittest.TestCase):
+
+    def setUp(self):
+        self.tb = gr.top_block()
+
+    def tearDown(self):
+        self.tb = None
+
+    def test_rail_001(self):
+        # Test set/gets
+        
+        hi1 = 1
+        hi2 = 2
+        lo1 = -1
+        lo2 = -2
+
+        op = analog.rail_ff(lo1, hi1)
+
+        op.set_hi(hi2)
+        h = op.hi()
+        self.assertEqual(hi2, h)
+
+        op.set_lo(lo2)
+        l = op.lo()
+        self.assertEqual(lo2, l)
+
+    def test_rail_002(self):
+        lo = -0.75
+        hi = 0.90
+        src_data = [-2, -1, -0.5, -0.25, 0, 0.25, 0.5, 1, 2]
+        expected_result = map(lambda x: clip(x, lo, hi), src_data)
+
+        src = gr.vector_source_f(src_data)
+        op = analog.rail_ff(lo, hi)
+        dst = gr.vector_sink_f()
+
+        self.tb.connect(src, op)
+        self.tb.connect(op, dst)
+        self.tb.run()
+
+        result_data = dst.data()
+        self.assertFloatTuplesAlmostEqual(expected_result, result_data, 4)
+
+if __name__ == '__main__':
+    gr_unittest.run(test_rail, "test_rail.xml")
+