add soundfile read/write unitest

.gitignore

@@ -1 +0,0 @@
-thirdparty

setup.sh

@@ -10,8 +10,9 @@ if [ $? != 0 ]; then
 fi
 
 # install package libsndfile
-DIR="$( cd "$(dirname "$0")" ; pwd -P )"
-mkdir thirdparty
+python -c "import soundfile"
+if [ $? != 0 ]; then
+    echo "Install package libsndfile into default system path."
     curl -O "http://www.mega-nerd.com/libsndfile/files/libsndfile-1.0.28.tar.gz"
     if [ $? != 0 ]; then
         echo "Download libsndfile-1.0.28.tar.gz failed !!!"
@@ -19,10 +20,11 @@ if [ $? != 0 ]; then
     fi
     tar -zxvf libsndfile-1.0.28.tar.gz
     cd libsndfile-1.0.28
-./configure --prefix=$DIR/thirdparty/libsndfile && make && make install
+    ./configure && make && make install
     cd ..
     rm -rf libsndfile-1.0.28
     rm libsndfile-1.0.28.tar.gz
+fi
 
 # prepare ./checkpoints
 mkdir checkpoints

tests/test_setup.py

@@ -1,11 +1,22 @@
 """Test Setup."""
 import unittest
+import numpy as np
+import os
 
 
 class TestSetup(unittest.TestCase):
-    # test the installation of libsndfile library
     def test_soundfile(self):
-        import soundfile
+        import soundfile as sf
+        # floating point data is typically limited to the interval [-1.0, 1.0],
+        # but smaller/larger values are supported as well
+        data = np.array([[1.75, -1.75], [1.0, -1.0], [0.5, -0.5],
+                         [0.25, -0.25]])
+        file = 'test.wav'
+        sf.write(file, data, 44100, format='WAV', subtype='FLOAT')
+        read, fs = sf.read(file)
+        assert np.all(read == data)
+        assert fs == 44100
+        os.remove(file)
 
 
 if __name__ == '__main__':