Replace nosetests references with py.test

Author: emulbreh

docs/sphinx/source/contributing.rst

@@ -83,14 +83,14 @@ changes, such as fixing documentation typos.
 Testing
 -------
 
-pvlib's unit tests can easily be run by executing ``nosetests`` on the
+pvlib's unit tests can easily be run by executing ``py.test`` on the
 pvlib directory:
 
-``nosetests -v pvlib``
+``py.test pvlib``
 
 or, for a single module:
 
-``nosetests -v pvlib/tests/test_clearsky.py``
+``py.test pvlib/test/test_clearsky.py``
 
 While copy/paste coding should generally be avoided, it's a great way
 to learn how to write unit tests!

docs/sphinx/source/installation.rst

@@ -154,7 +154,7 @@ referred to as *conda environments*, but they're the same for our purposes.
    ``conda create --name pvlibdev python pandas scipy``
 #. **Activate** the new conda environment: ``source activate pvlibdev``
 #. **Install** additional packages into your development environment:
-   ``conda install jupyter ipython matplotlib seaborn nose flake8``
+   ``conda install jupyter ipython matplotlib seaborn pytest flake8``
 
 The `conda documentation
 <http://conda.pydata.org/docs/using/index.html>`_ has more information

setup.py

@@ -46,7 +46,7 @@
                     'six',
                     ]
 SETUP_REQUIRES = ['pytest-runner']
-TESTS_REQUIRE = ['pytest', 'nose']
+TESTS_REQUIRE = ['pytest']
 
 CLASSIFIERS = [
     'Development Status :: 4 - Beta',