Use pytest

Author: isuruf

bin/install_travis.sh

@@ -2,7 +2,7 @@
 
 # symengine's bin/install_travis.sh will install miniconda
 
-export conda_pkgs="python=${PYTHON_VERSION} pip cython nose pytest"
+export conda_pkgs="python=${PYTHON_VERSION} pip cython pytest"
 
 if [[ "${WITH_SYMPY}" != "no" ]]; then
     export conda_pkgs="${conda_pkgs} sympy";

bin/test_travis.sh

@@ -9,9 +9,7 @@ set -x
 python setup.py install build_ext --inplace --symengine-dir=$our_install_dir
 
 # Test python wrappers
-nosetests -v
-# If switching to py.test, the following collects correct tests:
-#py.test -v $PYTHON_SOURCE_DIR/symengine/tests/test_*.py
+py.test -v $PYTHON_SOURCE_DIR/symengine/tests/test_*.py
 mkdir -p empty && cd empty
 python $PYTHON_SOURCE_DIR/bin/test_python.py
 cd ..