chore: add roleTransactions tests

packages/web/src/utils/roleTransactions.spec.ts

@@ -0,0 +1,25 @@
+import { RoleTransaction, TransactionType } from '@roleypoly/types';
+import { makeRoleTransactions } from './roleTransactions';
+
+it('creates a transactional diff of two sets of roles', () => {
+    const currentRoles = ['aaa', 'bbb', 'ccc', 'ddd'];
+    const nextRoles = ['bbb', 'ccc', 'ddd', 'eee', 'fff']; // removes aaa, adds eee + fff
+
+    const transactions = makeRoleTransactions(currentRoles, nextRoles);
+    expect(transactions).toEqual(
+        expect.arrayContaining<RoleTransaction>([
+            {
+                id: 'aaa',
+                action: TransactionType.Remove,
+            },
+            {
+                id: 'fff',
+                action: TransactionType.Add,
+            },
+            {
+                id: 'eee',
+                action: TransactionType.Add,
+            },
+        ])
+    );
+});