Added flask database migration test to CI

.gitlab-ci.yml

@@ -54,6 +54,12 @@ test:pylint:
     - pylint app
   allow_failure: true
 
+test:migration:
+  script:
+    - cp config.yaml.example config.yaml
+    - pip install -r requirements.txt --quiet
+    - sh scripts/test_migrate.sh
+
 pages:
   stage: deploy
   script:

scripts/test_migrate.sh

@@ -0,0 +1,23 @@
+#!/bin/sh
+
+set -e
+
+nlines={1..$(flask db history | wc -l)}
+
+# Upgrade to latest db schema
+for _ in $nlines
+do
+  flask db upgrade
+done
+
+# Downgrade to the first schema
+for _ in $nlines
+do
+  flask db downgrade
+done
+
+# Upgrade to the latest version again
+for _ in $nlines
+do
+  flask db upgrade
+done