Replace nose with coverage + unittest

requires/testing.txt

@@ -9,7 +9,6 @@ flake8-import-order==0.18.1
 flake8-quotes==3.3.1
 flake8-rst-docstrings==0.2.5
 flake8-tuple==0.4.1
-nose==1.3.7
 u-msgpack-python==2.7.1
 yapf==0.32.0
 -r installation.txt

setup.cfg

@@ -2,7 +2,13 @@
 universal = 1
 
 [coverage:report]
-show_missing = 1
+show_missing = True
+include =
+    sprockets/*
+
+[coverage:run]
+branch = True
+command_line = -m unittest discover tests --buffer --verbose
 
 [flake8]
 application-import-names=sprockets.mixins.http
@@ -10,17 +16,6 @@ exclude=build,env
 ignore=RST304
 import-order-style=google
 
-[nosetests]
-cover-branches=1
-cover-erase=1
-cover-html=1
-cover-html-dir=build/coverage
-cover-package=sprockets.mixins.http
-cover-tests=1
-with-coverage=1
-logging-level=DEBUG
-verbosity=2
-
 [upload_docs]
 upload_dir = build/sphinx/html
 

tox.ini

@@ -1,16 +1,20 @@
 [tox]
 envlist = lint,py37,py38,py39
 indexserver =
-    default = https://pypi.org/simple
+    default = https://pypi.python.org/simple
 toxworkdir = build/tox
+skip_missing_interpreters = True
+use_develop = True
 
 [testenv]
 commands =
-    python -m unittest
-deps = -rrequires/testing.txt
-use_develop = True
+    coverage run
+
+deps =
+    .
+    -rrequires/testing.txt
 
 [testenv_lint]
 commands =
-	flake8
-	yapf -dr sprockets tests.py
+    flake8
+    yapf -dr sprockets tests.py