add new files for clearCompletedTodos functionality

test/api/v3/integration/tasks/POST-tasks_clearCompletedTodos.test.js

@@ -0,0 +1,41 @@
+import {
+  generateUser,
+  generateGroup,
+  generateChallenge,
+} from '../../../../helpers/api-integration/v3';
+
+describe('POST /tasks/clearCompletedTodos', () => {
+  it('deletes all completed todos except the ones from a challenge', async () => {
+    let user = await generateUser({balance: 1});
+    let guild = await generateGroup(user);
+    let challenge = await generateChallenge(user, guild);
+
+    let initialTodoCount = user.tasksOrder.todos.length;
+    await user.post('/tasks/user', [
+      {text: 'todo 1', type: 'todo'},
+      {text: 'todo 2', type: 'todo'},
+      {text: 'todo 3', type: 'todo'},
+      {text: 'todo 4', type: 'todo'},
+      {text: 'todo 5', type: 'todo'},
+    ]);
+
+    await user.post(`/tasks/challenge/${challenge._id}`, {
+      text: 'todo 6',
+      type: 'todo',
+    });
+
+    let tasks = await user.get('/tasks/user?type=todo');
+    expect(tasks.length).to.equal(initialTodoCount + 6);
+
+    for (let task of tasks) {
+      if (['todo 2', 'todo 3', 'todo 6'].indexOf(task.text) !== -1) {
+        await user.post(`/tasks/${task._id}/score/up`); // eslint-disable-line babel/no-await-in-loop
+      }
+    }
+
+    await user.post('/tasks/clearCompletedTodos');
+    let tasksUpdated = await user.get('/tasks/user?type=todo&includeCompletedTodos=true');
+    expect(tasksUpdated.length).to.equal(initialTodoCount + 4); // + 6 - 3 completed (but one is from challenge)
+    expect(tasksUpdated[tasksUpdated.length - 1].text).to.equal('todo 6');
+  });
+});