Use tox for running tests locally.

See: http://wiki.openstack.org/ProjectTestingInterface

Tox can manage virtualenvs, and is currently doing so for running
tests in Jenkins.  It's just as, or more, useful for running tests
locally, so this starts the migration from the run_tests system to
tox.  The goal is to reduce duplicate testing infrastructure, and
get what's running locally on developer workstations as close to
what is run by Jenkins as possible.

This patch removes run_tests.py, and the scripts that manage .venv.
It makes run_tests.sh call tox to facilitate the transition for
developers used to typing "run_tests.sh".

Developers will need tox installed on their workstations.  It can
be installed from PyPI with "pip install tox".  run_tests.sh outputs
those instructions if tox is not present.

New facilities are available using tox directly, including:

  tox -e py26  # run tests under python 2.6
  tox -e py27  # run tests under python 2.7
  tox -e pep8  # run pep8 tests
  tox          # run all of the above
  tox -e venv foo  # run the command "foo" inside a virtualenv

The configuration of the openstack nose plugin is removed from
setup.cfg and added to the nosetests command line arguments in tox.
It is used when running tox from the command line, so the enhanced,
colorized output is visible to developers running the test suite
locally.  However, when Jenkins runs tox, the xunit plugin will be
used instead, providing output natively understood by jenkins which
is much more readable in that context.

Change-Id: Id678c2fb8a5a7d79c680d3d1f2f12141f73dc8a6

run_tests.sh

@@ -4,92 +4,46 @@ function usage {
   echo "Usage: $0 [OPTION]..."
   echo "Run python-glanceclient's test suite(s)"
   echo ""
-  echo "  -V, --virtual-env        Always use virtualenv.  Install automatically if not present"
-  echo "  -N, --no-virtual-env     Don't use virtualenv.  Run tests in local environment"
-  echo "  -f, --force              Force a clean re-build of the virtual environment. Useful when dependencies have been added."
-  echo "  --unittests-only         Run unit tests only, exclude functional tests."
   echo "  -p, --pep8               Just run pep8"
   echo "  -h, --help               Print this usage message"
   echo ""
-  echo "Note: with no options specified, the script will try to run the tests in a virtual environment,"
-  echo "      If no virtualenv is found, the script will ask if you would like to create one.  If you "
-  echo "      prefer to run tests NOT in a virtual environment, simply pass the -N option."
+  echo "This script is deprecated and currently retained for compatibility."
+  echo 'You can run the full test suite for multiple environments by running "tox".'
+  echo 'You can run tests for only python 2.7 by running "tox -e py27", or run only'
+  echo 'the pep8 tests with "tox -e pep8".'
   exit
 }
 
+command -v tox > /dev/null 2>&1
+if [ $? -ne 0 ]; then
+  echo 'This script requires "tox" to run.'
+  echo 'You can install it with "pip install tox".'
+  exit 1; 
+fi
+
+just_pep8=0
+
 function process_option {
   case "$1" in
     -h|--help) usage;;
-    -V|--virtual-env) let always_venv=1; let never_venv=0;;
-    -N|--no-virtual-env) let always_venv=0; let never_venv=1;;
     -p|--pep8) let just_pep8=1;;
-    -f|--force) let force=1;;
-    *) noseargs="$noseargs $1"
   esac
 }
 
-venv=.venv
-with_venv=tools/with_venv.sh
-always_venv=0
-never_venv=0
-force=0
-noseargs=
-wrapper=""
-just_pep8=0
-
 for arg in "$@"; do
   process_option $arg
 done
 
-function run_tests {
-  # Just run the test suites in current environment
-  ${wrapper} rm -f tests.sqlite
-  ${wrapper} $NOSETESTS 2> run_tests.err.log
-}
-
-function run_pep8 {
-  echo "Running pep8..."
-  PEP8_OPTIONS="--exclude=$PEP8_EXCLUDE --repeat"
-  PEP8_INCLUDE="glanceclient/*.py setup.py run_tests.py tools/install_venv.py"
-  ${wrapper} pep8 $PEP8_OPTIONS $PEP8_INCLUDE
-}
-
-
-NOSETESTS="python run_tests.py $noseargs"
-
-if [ $never_venv -eq 0 ]
-then
-  # Remove the virtual environment if --force used
-  if [ $force -eq 1 ]; then
-    echo "Cleaning virtualenv..."
-    rm -rf ${venv}
-  fi
-  if [ -e ${venv} ]; then
-    wrapper="${with_venv}"
-  else
-    if [ $always_venv -eq 1 ]; then
-      # Automatically install the virtualenv
-      python tools/install_venv.py
-      wrapper="${with_venv}"
-    else
-      echo -e "No virtual environment found...create one? (Y/n) \c"
-      read use_ve
-      if [ "x$use_ve" = "xY" -o "x$use_ve" = "x" -o "x$use_ve" = "xy" ]; then
-        # Install the virtualenv and run the test suite in it
-        python tools/install_venv.py
-		    wrapper=${with_venv}
-      fi
-    fi
-  fi
-fi
-
 if [ $just_pep8 -eq 1 ]; then
-    run_pep8
-    exit
+  tox -e pep8
+  exit
 fi
 
-run_tests || exit
-
-if [ -z "$noseargs" ]; then
-  run_pep8
+tox -e py27 $toxargs 2>&1 | tee run_tests.err.log  || exit
+if [ ${PIPESTATUS[0]} -ne 0 ]; then
+  exit ${PIPESTATUS[0]}
+fi
+
+if [ -z "$toxargs" ]; then
+  tox -e pep8
 fi