Cache databases to speed up acceptance tests

scripts/reset-test-db.sh

@@ -0,0 +1,54 @@
+#!/usr/bin/env bash
+
+############################################################################
+#
+#   reset-test-db.sh
+#
+#   Resets the MySQL test database for the bok-choy acceptance tests.
+#
+#   If it finds a cached schema and migration history, it will start
+#   from the cached version to speed up migrations.
+#
+#   If no cached database exists, it will create one.  This can be
+#   checked into the repo to speed up future tests.
+#
+#   Note that we do NOT want to re-use the cache between test runs!
+#   A newer commit could introduce migrations that do not exist
+#   in other commits, which could cause migrations to fail in the other
+#   commits.
+#
+#   For this reason, we always use a cache that was committed to master
+#   at the time the branch was created.
+#
+############################################################################
+
+DB_CACHE_DIR="common/test/db_cache"
+
+# Clear out the test database
+./manage.py lms --settings bok_choy reset_db --traceback --noinput
+
+# If there are cached database schemas/data, load them
+if [[ -f $DB_CACHE_DIR/bok_choy_schema.sql && -f $DB_CACHE_DIR/bok_choy_data.json ]]; then
+
+    # Load the schema, then the data (including the migration history)
+    mysql -u root test < $DB_CACHE_DIR/bok_choy_schema.sql
+    ./manage.py lms --settings bok_choy loaddata $DB_CACHE_DIR/bok_choy_data.json
+
+    # Re-run migrations to ensure we are up-to-date
+    ./manage.py lms --settings bok_choy migrate --traceback --noinput
+
+# Otherwise, update the test database and update the cache
+else
+
+    # Clean the cache directory
+    rm -rf $DB_CACHE_DIR && mkdir -p $DB_CACHE_DIR
+
+    # Re-run migrations on the test database
+    ./manage.py lms --settings bok_choy syncdb --traceback --noinput
+    ./manage.py lms --settings bok_choy migrate --traceback --noinput
+
+    # Dump the schema and data to the cache
+    ./manage.py lms --settings bok_choy dumpdata > $DB_CACHE_DIR/bok_choy_data.json
+    mysqldump -u root --no-data --skip-comments --skip-dump-date test > $DB_CACHE_DIR/bok_choy_schema.sql
+fi
+