add tests for db upgrade with mysql, postgres

test-db-upgrade/docker-db.sh

@@ -0,0 +1,19 @@
+#!/usr/bin/env bash
+set -e
+NAME="hub-test-$DB"
+docker rm -f $NAME 2>/dev/null || true
+
+case $DB in
+mysql)
+  ARGS="-p 13306:3306 -e MYSQL_ROOT_PASSWORD=x -e MYSQL_DATABASE=jupyterhub mysql:5.7"
+  ;;
+postgres)
+  ARGS="-p 15432:5432 -e POSTGRES_DB=jupyterhub postgres:9.5"
+  ;;
+*)
+  echo "must be mysql or postgres"
+  exit -1
+esac
+
+set -x
+docker run --rm --name $NAME -d $ARGS

test-db-upgrade/jupyterhub_config.py

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+import os
+c.JupyterHub.cookie_secret = os.urandom(32)
+
+DB = os.environ.get('DB')
+if DB == 'mysql':
+    c.JupyterHub.db_url = 'mysql+pymysql://root:x@127.0.0.1:13306/jupyterhub'
+elif DB == 'postgres':
+    c.JupyterHub.db_url = 'postgresql://postgres@127.0.0.1:15432/jupyterhub'
+
+c.JupyterHub.authenticator_class = 'jupyterhub.auth.Authenticator'
+c.Authenticator.whitelist = {'alpha', 'beta', 'gamma'}

test-db-upgrade/old-requirements.txt

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+jupyterhub-dummyauthenticator
+jupyterhub==0.7.2
+psycopg2
+pymysql

test-db-upgrade/test.sh

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+#!/usr/bin/env bash
+set -e
+TMPDIR=$(mktemp -d)
+ENVDIR="$TMPDIR/env"
+
+# start mysql and postgres (do this first, so they have time to startup)
+for DB in postgres mysql; do
+  export DB
+  bash docker-db.sh
+done
+
+# create virtualenv with jupyterhub 0.7
+echo "creating virutalenv in $ENVDIR"
+python -m virtualenv "$ENVDIR"
+$ENVDIR/bin/pip install -q -r old-requirements.txt
+
+echo "env-jupyterhub: $($ENVDIR/bin/jupyterhub --version)"
+echo "jupyterhub-$(jupyterhub --version)"
+
+set -x
+# launch jupyterhub-0.7 token entrypoint to ensure db is initialized
+for DB in sqlite postgres mysql; do
+  export $DB
+  echo -e "\n\n\nupgrade-db test: $DB"
+  for i in {1..60}; do
+    if "$ENVDIR/bin/jupyterhub" token alpha; then
+      break
+    else
+      echo "waiting for $DB"
+      sleep 2
+    fi
+  done
+
+  # run upgrade-db
+  jupyterhub upgrade-db
+  # generate a token, for basic exercise
+  jupyterhub token beta
+
+  echo -e "\n\n$DB OK"
+done
+
+docker rm -f hub-test-postgres hub-test-mysql
+rm -rf $ENVDIR