1 files changed, 64 insertions, 0 deletions
diff --git a/gnuradio-runtime/python/gnuradio/gr/qa_random.py b/gnuradio-runtime/python/gnuradio/gr/qa_random.py
new file mode 100644
index 0000000000..83fee56181
--- /dev/null
+++ b/gnuradio-runtime/python/gnuradio/gr/qa_random.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python
+#
+# Copyright 2006,2007,2010,2015 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 numpy as np
+
+class test_random(gr_unittest.TestCase):
+
+    # NOTE: For tests on the output distribution of the random numbers, see gnuradio-runtime/apps/evaluation_random_numbers.py.
+
+    # Check for range [0,1) of uniform distributed random numbers
+    def test_1(self):
+        num_tests = 10000
+        values = np.zeros(num_tests)
+        rndm = gr.random()
+        for k in range(num_tests):
+            values[k] = rndm.ran1()
+        for value in values:
+            self.assertLess(value, 1)
+            self.assertGreaterEqual(value, 0)
+
+    # Check reseed method (init with time and seed as fix number)
+    def test_2(self):
+        num = 5
+
+        rndm0 = gr.random(42); # init with time
+        rndm1 = gr.random(42); # init with fix seed
+        for k in range(num):
+            x = rndm0.ran1();
+            y = rndm1.ran1();
+            self.assertEqual(x,y)
+
+        x = np.zeros(num)
+        y = np.zeros(num)
+        rndm0 = gr.random(42); # init with fix seed 1
+        for k in range(num):
+            x[k] = rndm0.ran1();
+        rndm1.reseed(43); # init with fix seed 2
+        for k in range(num):
+            y[k] = rndm0.ran1();
+        for k in range(num):
+            self.assertNotEqual(x[k],y[k])
+
+if __name__ == '__main__':
+    gr_unittest.run(test_random, "test_random.xml")