Stop using python setup.py test

This causes us to run through setuptools without pip, meaning setuptools
thinks it should download eggs for setuptools_scm. O_o It's not really
something most projects use, and at any rate it's actually shorter to
use pytest directly. Getting rid of that means we don't need anything
for pytest-runner or the alias in setup.cfg.

.appveyor.yml

@@ -39,7 +39,7 @@ build: off
 
 test_script:
     - cmd: set TEST_DATA_DIR=%APPVEYOR_BUILD_FOLDER%\\staticdata
-    - cmd: python setup.py test --addopts "-s --junitxml=tests.xml --flake8 --mpl --cov=metpy -W error::metpy.deprecation.MetpyDeprecationWarning"
+    - cmd: pytest -s --junitxml=tests.xml --flake8 --mpl --cov=metpy -W error::metpy.deprecation.MetpyDeprecationWarning
     - cmd: cd docs
     - cmd: make overridecheck html
     - cmd: cd ..

.circleci/config.yml

@@ -33,13 +33,13 @@ jobs:
           paths:
             - ./venv
           key: v1-dependencies-{{ checksum "setup.py" }}
-        
+
       # run tests!
       - run:
           name: run tests
           command: |
             . venv/bin/activate
-            python setup.py test --addopts "-s --flake8 --mpl"
+            pytest -s --flake8 --mpl
 
       - store_artifacts:
           path: test-reports

.travis.yml

@@ -129,7 +129,7 @@ script:
       fi;
     else
       flake8 --version;
-      python setup.py test --addopts "$TEST_OUTPUT_CONTROL $TEST_OPTS";
+      pytest $TEST_OUTPUT_CONTROL $TEST_OPTS;
     fi
 
 after_script:

environment.yml

@@ -20,7 +20,6 @@ dependencies:
   - pytest-cov
   - pytest-flake8
   - pytest-mpl
-  - pytest-runner
   - flake8-builtins!=1.4.0
   - flake8-comprehensions=1.4.1
   - flake8-copyright

setup.cfg

@@ -52,7 +52,7 @@ exclude = doc, examples
 dev = ipython[all]>=3.1
 doc = sphinx>=1.8; sphinx-gallery>=0.4; doc8; m2r; netCDF4
 examples = cartopy>=0.13.1; matplotlib>=2.2.0; pyproj>=1.9.4,!=2.0.0
-test = pytest>=2.4; pytest-runner; pytest-mpl; pytest-flake8; cartopy>=0.16.0; flake8>3.2.0; flake8-builtins!=1.4.0; flake8-comprehensions; flake8-copyright; flake8-docstrings; flake8-import-order; flake8-mutable; flake8-pep3101; flake8-print; flake8-quotes; flake8-rst-docstrings; pep8-naming; netCDF4; pyproj>=1.9.4,!=2.0.0
+test = pytest>=2.4; pytest-mpl; pytest-flake8; cartopy>=0.16.0; flake8>3.2.0; flake8-builtins!=1.4.0; flake8-comprehensions; flake8-copyright; flake8-docstrings; flake8-import-order; flake8-mutable; flake8-pep3101; flake8-print; flake8-quotes; flake8-rst-docstrings; pep8-naming; netCDF4; pyproj>=1.9.4,!=2.0.0
 
 [bdist_wheel]
 # This flag says that the code is written to work on both Python 2 and 3.
@@ -63,9 +63,6 @@ source-dir = docs/source
 build-dir = docs/build
 all-files = True
 
-[aliases]
-test = pytest
-
 [pycodestyle]
 ignore = W503
 max-line-length = 95