[pitivi] tests_: Waveform samples are serialized in numpy format now

[Thibault Saunier <tsaunier src gnome org>]

commit 94385c003ac5e851ca0e38da3d5560f94b091889
Author: Thibault Saunier <tsaunier gnome org>
Date:   Fri Aug 18 11:47:43 2017 -0300

    tests_: Waveform samples are serialized in numpy format now

 tests/test_previewers.py |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tests/test_previewers.py b/tests/test_previewers.py
index 76ec9fd..2b4e965 100644
--- a/tests/test_previewers.py
+++ b/tests/test_previewers.py
@@ -17,11 +17,11 @@
 # Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
 # Boston, MA 02110-1301, USA.
 import os
-import pickle
 import tempfile
 from unittest import mock
 from unittest import TestCase
 
+import numpy
 from gi.repository import GES
 from gi.repository import Gst
 
@@ -92,7 +92,7 @@ class TestPreviewers(BaseTestMediaLibrary):
         self.assertTrue(os.path.exists(wavefile), wavefile)
 
         with open(wavefile, "rb") as fsamples:
-            samples = pickle.load(fsamples)
+            samples = list(numpy.load(fsamples))
 
         self.assertEqual(samples, SIMPSON_WAVFORM_VALUES)