Use pytest instead of nosetests, for tox runs

setup.py

@@ -128,6 +128,8 @@ extras = {
         'fixture',                      # 1.5
         'mock',                         # 1.0.1
         'nose',                         # 1.3.0
+        'pytest',                       # 4.6.11
+        'pytest-cov',                   # 2.12.1
     ],
 }
 

tox.ini

@@ -1,35 +1,30 @@
+
 [tox]
-envlist = py27, py35
+envlist = py27, py35, py37
 
 [testenv]
-deps =
-        coverage
-        fixture
-        mock
-        nose
 commands =
         pip install --upgrade pip
+        pip install --upgrade setuptools wheel
         pip install --upgrade --upgrade-strategy eager Tailbone rattail[auth,bouncer,db] rattail-tempmon
-        nosetests {posargs}
+        pytest {posargs}
 
 [testenv:py27]
 commands =
         pip install --upgrade pip
+        pip install --upgrade setuptools wheel
         pip install --upgrade --upgrade-strategy eager Tailbone rattail[auth,bouncer,db] rattail-tempmon SQLAlchemy-Utils<0.36.7 SQLAlchemy-Continuum<1.3.12
-        nosetests {posargs}
+        pytest {posargs}
 
 [testenv:coverage]
 basepython = python3
 commands =
         pip install --upgrade pip
         pip install --upgrade --upgrade-strategy eager Tailbone rattail[auth,bouncer,db] rattail-tempmon
-        nosetests {posargs:--with-coverage --cover-html-dir={envtmpdir}/coverage}
+        pytest --cov=tailbone --cov-report=html
 
 [testenv:docs]
 basepython = python3
-deps =
-    Sphinx
-    sphinx-rtd-theme
 changedir = docs
 commands =
         pip install --upgrade pip