Edit of links and database versioning

backend/tests/test_database.py

@@ -0,0 +1,22 @@
+import sqlite3
+
+from backend.app.database import apply_migrations, get_schema_version
+
+
+def test_database_migrations_are_versioned_and_idempotent():
+    connection = sqlite3.connect(':memory:')
+
+    apply_migrations(connection)
+    assert get_schema_version(connection) == 1
+    tables = {
+        row[0]
+        for row in connection.execute(
+            "SELECT name FROM sqlite_master WHERE type = 'table'"
+        )
+    }
+    assert {'users', 'tokens', 'links', 'plugins', 'user_plugin_config'} <= tables
+
+    apply_migrations(connection)
+    assert get_schema_version(connection) == 1
+
+    connection.close()