test: cover transaction ordering

backend/src/services/transactions.test.ts

@@ -0,0 +1,13 @@
+import assert from 'node:assert/strict';
+import { transactionOrderBy } from './transactions';
+
+assert.equal(
+  transactionOrderBy('date', 'desc'),
+  't.operation_at DESC, t.source_position ASC, t.id ASC',
+);
+assert.equal(
+  transactionOrderBy('date', 'asc'),
+  't.operation_at ASC, t.source_position DESC, t.id DESC',
+);
+assert.match(transactionOrderBy('amount', 'desc'), /t\.amount_signed DESC.*t\.operation_at DESC.*t\.source_position ASC.*t\.id DESC/);
+console.log('transaction ordering: OK');