isAdmin: add tsests

utils/is-admin.test.js

@@ -0,0 +1,26 @@
+const { Member } = require('discord.js');
+const { Collection } = require('@discordjs/collection');
+const { isAdmin } = require('./is-admin'); // Adjust the path as necessary
+
+jest.mock('discord.js', () => ({
+  Member: jest.fn().mockImplementation((roles) => ({
+    roles: {
+      cache: roles,
+    },
+  })),
+}));
+
+describe('isAdmin', () => {
+  it('should return true if the user has an admin role', () => {
+    const memberMap = new Collection();
+    memberMap.set('role-1', { name: 'core' });
+    const member = Member(memberMap);
+    expect(isAdmin(member)).toBe(true);
+  });
+
+  it('should return false if the user does not have an admin role', () => {
+    const memberMap = new Collection();
+    const member = Member(memberMap);
+    expect(isAdmin(member)).toBe(false);
+  });
+});