add feature to invite user if he is partying solo

test/api/v3/integration/groups/POST-groups_groupId_join.test.js

@@ -1,6 +1,7 @@
 import {
   generateUser,
   createAndPopulateGroup,
+  checkExistence,
   translate as t,
 } from '../../../../helpers/api-v3-integration.helper';
 import { v4 as generateUUID } from 'uuid';
@@ -185,6 +186,23 @@ describe('POST /group/:groupId/join', () => {
         await expect(user.get('/user')).to.eventually.have.deep.property('items.quests.basilist', 2);
       });
 
+      it('deletes previous party where the user was the only member', async () => {
+        let userToInvite = await generateUser();
+        let oldParty = await userToInvite.post('/groups', { // add user to a party
+          name: 'Another Test Party',
+          type: 'party',
+        });
+
+        await expect(checkExistence('groups', oldParty._id)).to.eventually.equal(true);
+        await user.post(`/groups/${party._id}/invite`, {
+          uuids: [userToInvite._id],
+        });
+        await userToInvite.post(`/groups/${party._id}/join`);
+
+        await expect(user.get('/user')).to.eventually.have.deep.property('party._id', party._id);
+        await expect(checkExistence('groups', oldParty._id)).to.eventually.equal(false);
+      });
+
       xit('invites joining member to active quest', async () => {
         // TODO start quest
 

test/api/v3/integration/groups/POST-groups_invite.test.js

@@ -290,12 +290,14 @@ describe('Post /groups/:groupId/invite', () => {
       });
     });
 
-    it('returns an error when invited user is already in the party', async () => {
+    it('returns an error when invited user is already in a party of more than 1 member', async () => {
       let userToInvite = await generateUser();
+      let userToInvite2 = await generateUser();
       await inviter.post(`/groups/${party._id}/invite`, {
-        uuids: [userToInvite._id],
+        uuids: [userToInvite._id, userToInvite2._id],
       });
       await userToInvite.post(`/groups/${party._id}/join`);
+      await userToInvite2.post(`/groups/${party._id}/join`);
 
       await expect(inviter.post(`/groups/${party._id}/invite`, {
         uuids: [userToInvite._id],
@@ -306,5 +308,18 @@ describe('Post /groups/:groupId/invite', () => {
         message: t('userAlreadyInAParty'),
       });
     });
+
+    it('allow inviting an user to a party if he\'s partying solo', async () => {
+      let userToInvite = await generateUser();
+      await userToInvite.post('/groups', { // add user to a party
+        name: 'Another Test Party',
+        type: 'party',
+      });
+
+      await inviter.post(`/groups/${party._id}/invite`, {
+        uuids: [userToInvite._id],
+      });
+      expect((await userToInvite.get('/user')).invitations.party.id).to.equal(party._id);
+    });
   });
 });