feat: remove clear button from chat UI

src/components/Sidebar/index.jsx

@@ -1,24 +1,19 @@
 import React, { useRef, useEffect } from 'react';
-import { useDispatch, useSelector } from 'react-redux';
+import { useSelector } from 'react-redux';
 import PropTypes from 'prop-types';
-import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 import {
-  Button,
   Icon,
   IconButton,
 } from '@openedx/paragon';
 import { Close } from '@openedx/paragon/icons';
 
-import { clearMessages } from '../../data/thunks';
-import { OPTIMIZELY_PROMPT_EXPERIMENT_KEY } from '../../data/optimizely';
 import showSurvey from '../../utils/surveyMonkey';
 
 import APIError from '../APIError';
 import ChatBox from '../ChatBox';
 import Disclosure from '../Disclosure';
 import MessageForm from '../MessageForm';
 import './Sidebar.scss';
-import { usePromptExperimentDecision } from '../../experiments';
 
 const Sidebar = ({
   courseId,
@@ -32,14 +27,6 @@ const Sidebar = ({
     messageList,
   } = useSelector(state => state.learningAssistant);
   const chatboxContainerRef = useRef(null);
-  const dispatch = useDispatch();
-
-  const [decision] = usePromptExperimentDecision();
-  const { enabled: enabledExperiment, variationKey } = decision || {};
-  const experimentPayload = enabledExperiment ? {
-    experiment_name: OPTIMIZELY_PROMPT_EXPERIMENT_KEY,
-    variation_key: variationKey,
-  } : {};
 
   // this use effect is intended to scroll to the bottom of the chat window, in the case
   // that a message is larger than the chat window height.
@@ -83,14 +70,6 @@ const Sidebar = ({
     }
   };
 
-  const handleClearMessages = () => {
-    dispatch(clearMessages());
-    sendTrackEvent('edx.ui.lms.learning_assistant.clear', {
-      course_id: courseId,
-      ...experimentPayload,
-    });
-  };
-
   const getMessageForm = () => (
     <MessageForm courseId={courseId} shouldAutofocus unitId={unitId} />
   );
@@ -120,18 +99,6 @@ const Sidebar = ({
         )
       }
       {getMessageForm()}
-      <div className="d-flex justify-content-start">
-        <Button
-          className="clear mx-2 mb-2 border-0"
-          onClick={handleClearMessages}
-          aria-label="clear"
-          variant="primary"
-          type="button"
-          data-testid="sidebar-clear-btn"
-        >
-          Clear
-        </Button>
-      </div>
     </div>
   );
 

src/components/Sidebar/index.test.jsx

@@ -1,11 +1,9 @@
 import React from 'react';
 import { screen, act } from '@testing-library/react';
-import { sendTrackEvent } from '@edx/frontend-platform/analytics';
 
 import { usePromptExperimentDecision } from '../../experiments';
 import { render as renderComponent } from '../../utils/utils.test';
 import { initialState } from '../../data/slice';
-import { OPTIMIZELY_PROMPT_EXPERIMENT_KEY, OPTIMIZELY_PROMPT_EXPERIMENT_VARIATION_KEYS } from '../../data/optimizely';
 import showSurvey from '../../utils/surveyMonkey';
 
 import Sidebar from '.';
@@ -35,11 +33,6 @@ jest.mock('../../experiments', () => ({
   usePromptExperimentDecision: jest.fn(),
 }));
 
-const clearMessagesAction = 'clear-messages-action';
-jest.mock('../../data/thunks', () => ({
-  clearMessages: () => 'clear-messages-action',
-}));
-
 const defaultProps = {
   courseId: 'some-course-id',
   isOpen: true,
@@ -88,17 +81,6 @@ describe('<Sidebar />', () => {
       render(undefined, { disclosureAcknowledged: true });
       expect(screen.queryByTestId('sidebar-xpert')).toBeInTheDocument();
     });
-
-    it('should dispatch clearMessages() and call sendTrackEvent() with the expected props on clear', () => {
-      render(undefined, { disclosureAcknowledged: true });
-
-      act(() => {
-        screen.queryByTestId('sidebar-clear-btn').click();
-      });
-
-      expect(mockDispatch).toHaveBeenCalledWith(clearMessagesAction);
-      expect(sendTrackEvent).toHaveBeenCalledWith('edx.ui.lms.learning_assistant.clear', { course_id: defaultProps.courseId });
-    });
   });
 
   describe('when it\'s not open', () => {
@@ -133,28 +115,5 @@ describe('<Sidebar />', () => {
 
       expect(showSurvey).toHaveBeenCalled();
     });
-
-    it('should dispatch clearMessages() and call sendTrackEvent() with the expected props on clear', () => {
-      usePromptExperimentDecision.mockReturnValue([{
-        enabled: true,
-        variationKey: OPTIMIZELY_PROMPT_EXPERIMENT_VARIATION_KEYS.UPDATED_PROMPT,
-      }]);
-
-      render(undefined, {
-        ...defaultState,
-        disclosureAcknowledged: true,
-      });
-
-      act(() => {
-        screen.queryByTestId('sidebar-clear-btn').click();
-      });
-
-      expect(mockDispatch).toHaveBeenCalledWith(clearMessagesAction);
-      expect(sendTrackEvent).toHaveBeenCalledWith('edx.ui.lms.learning_assistant.clear', {
-        course_id: defaultProps.courseId,
-        experiment_name: OPTIMIZELY_PROMPT_EXPERIMENT_KEY,
-        variation_key: OPTIMIZELY_PROMPT_EXPERIMENT_VARIATION_KEYS.UPDATED_PROMPT,
-      });
-    });
   });
 });

src/data/slice.js

@@ -26,11 +26,6 @@ export const learningAssistantSlice = createSlice({
     setMessageList: (state, { payload }) => {
       state.messageList = payload.messageList;
     },
-    resetMessages: (state) => {
-      state.currentMessage = '';
-      state.messageList = [];
-      state.apiError = false;
-    },
     setApiError: (state) => {
       state.apiError = true;
     },
@@ -56,7 +51,6 @@ export const {
   setCurrentMessage,
   clearCurrentMessage,
   setMessageList,
-  resetMessages,
   setApiError,
   setApiIsLoading,
   resetApiError,

src/data/thunks.js

@@ -6,7 +6,6 @@ import { fetchChatResponse, fetchLearningAssistantMessageHistory, fetchLearningA
 import {
   setCurrentMessage,
   clearCurrentMessage,
-  resetMessages,
   setMessageList,
   setApiError,
   setApiIsLoading,
@@ -74,13 +73,6 @@ export function getChatResponse(courseId, unitId, promptExperimentVariationKey =
   };
 }
 
-export function clearMessages() {
-  return (dispatch) => {
-    dispatch(resetMessages());
-    dispatch(resetApiError());
-  };
-}
-
 export function getLearningAssistantMessageHistory(courseId) {
   return async (dispatch) => {
     dispatch(setApiIsLoading(true));

src/widgets/Xpert.test.jsx

@@ -44,7 +44,6 @@ const assertSidebarElementsNotInDOM = () => {
 
   expect(screen.queryByRole('button', { name: 'submit' })).not.toBeInTheDocument();
   expect(screen.queryByTestId('close-button')).not.toBeInTheDocument();
-  expect(screen.queryByRole('button', { name: 'clear' })).not.toBeInTheDocument();
 };
 
 beforeEach(() => {
@@ -115,7 +114,6 @@ test('clicking the call to action opens the sidebar', async () => {
   expect(screen.getByRole('textbox')).toBeVisible();
   expect(screen.getByRole('button', { name: 'submit' })).toBeVisible();
   expect(screen.getByTestId('close-button')).toBeVisible();
-  expect(screen.getByRole('button', { name: 'clear' })).toBeVisible();
 
   // assert that text input has focus
   expect(screen.getByRole('textbox')).toHaveFocus();
@@ -135,7 +133,6 @@ test('clicking the toggle button opens the sidebar', async () => {
   expect(screen.getByRole('textbox')).toBeVisible();
   expect(screen.getByRole('button', { name: 'submit' })).toBeVisible();
   expect(screen.getByTestId('close-button')).toBeVisible();
-  expect(screen.getByRole('button', { name: 'clear' })).toBeVisible();
 
   // assert that text input has focus
   expect(screen.getByRole('textbox')).toHaveFocus();
@@ -190,34 +187,6 @@ test('response text appears as message in the sidebar', async () => {
   await screen.findByText(responseMessage.content);
   expect(screen.getByText(responseMessage.content)).toBeInTheDocument();
 });
-test('clicking the clear button clears messages in the sidebar', async () => {
-  const user = userEvent.setup();
-  const userMessage = 'Hello, Xpert!';
-
-  // re-mock the fetchChatResponse API function so that we can assert that the
-  // responseMessage appears in the DOM and then is successfully cleared
-  const responseMessage = createRandomResponseForTesting();
-  jest.spyOn(api, 'fetchChatResponse').mockImplementation(() => responseMessage);
-
-  render(<Xpert courseId={courseId} contentToolsEnabled={false} unitId={unitId} />, { preloadedState: initialState });
-
-  // wait for button to appear
-  await screen.findByTestId('toggle-button');
-
-  await user.click(screen.queryByTestId('toggle-button'));
-
-  // type the user message
-  const input = screen.getByRole('textbox');
-  await user.type(input, userMessage);
-  await user.click(screen.getByRole('button', { name: 'submit' }));
-
-  await screen.findByText(responseMessage.content);
-
-  await user.click(screen.getByRole('button', { name: 'clear' }));
-
-  expect(screen.queryByText(userMessage)).not.toBeInTheDocument();
-  expect(screen.queryByText(responseMessage.content)).not.toBeInTheDocument();
-});
 test('clicking the close button closes the sidebar', async () => {
   const user = userEvent.setup();
   render(<Xpert courseId={courseId} contentToolsEnabled={false} unitId={unitId} />, { preloadedState: initialState });
@@ -307,35 +276,6 @@ test('error message should disappear when dismissed', async () => {
   await user.click(screen.getByText('Dismiss'));
   expect(screen.queryByText('Please try again by sending another question.')).not.toBeInTheDocument();
 });
-test('error message should disappear when messages cleared', async () => {
-  const user = userEvent.setup();
-
-  const errorState = {
-    learningAssistant: {
-      currentMessage: '',
-      messageList: [],
-      apiIsLoading: false,
-      apiError: true,
-      // TEMPORARY: This is simply to ensure that the tests pass by hiding the disclosure.
-      //            I will remove this and write tests in a future pull request.
-      disclosureAcknowledged: true,
-      sidebarIsOpen: false,
-    },
-  };
-  render(<Xpert courseId={courseId} contentToolsEnabled={false} unitId={unitId} />, { preloadedState: errorState });
-
-  // wait for button to appear
-  await screen.findByTestId('toggle-button');
-
-  await user.click(screen.queryByTestId('toggle-button'));
-
-  // assert that error message exists
-  expect(screen.queryByText('Please try again by sending another question.')).toBeInTheDocument();
-
-  // clear messages, assert that error message disappears
-  await user.click(screen.getByText('Clear'));
-  expect(screen.queryByText('Please try again by sending another question.')).not.toBeInTheDocument();
-});
 test('popup modal should open chat', async () => {
   const user = userEvent.setup();
   window.localStorage.clear();
@@ -357,7 +297,6 @@ test('popup modal should open chat', async () => {
   expect(screen.getByRole('textbox')).toBeVisible();
   expect(screen.getByRole('button', { name: 'submit' })).toBeVisible();
   expect(screen.getByTestId('close-button')).toBeVisible();
-  expect(screen.getByRole('button', { name: 'clear' })).toBeVisible();
 });
 test('popup modal should close and display CTA', async () => {
   const user = userEvent.setup();