Add basic test cases for the new ThreadProvider (#1274)

### Changelog
This PR will add the test cases for the new `ThreadProvider` and its
related hooks.
#### Before
<img width="1163" alt="스크린샷 2024-12-09 오전 11 29 53"
src="https://github.com/user-attachments/assets/40ffc29e-0774-4ac7-973d-15af55bc88fd">

#### After
<img width="1199" alt="스크린샷 2024-12-09 오전 11 28 39"
src="https://github.com/user-attachments/assets/ea3366c0-2f11-4e1f-af6f-a423d006ab42">

---------

Co-authored-by: Irene Ryu <[email protected]>

src/modules/Thread/components/ThreadUI/__test__/ThreadUI.integration.test.tsx

@@ -0,0 +1,392 @@
+import * as useThreadModule from '../../../context/useThread';
+import { ChannelStateTypes, ParentMessageStateTypes, ThreadListStateTypes } from '../../../types';
+import { EmojiContainer } from '@sendbird/chat';
+import { act, fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { LocalizationContext } from '../../../../../lib/LocalizationContext';
+import ThreadUI from '../index';
+import React from 'react';
+import '@testing-library/jest-dom/extend-expect';
+
+const mockSendUserMessage = jest.fn();
+
+const mockChannel = {
+  url: 'test-channel',
+  members: [{ userId: 'test-user-id', nickname: 'user1' }],
+  updateUserMessage: jest.fn().mockImplementation(async (message) => mockNewMessage(message)),
+  sendUserMessage: mockSendUserMessage,
+  isGroupChannel: jest.fn().mockImplementation(() => true),
+};
+
+const mockNewMessage = (message) => ({
+  messageId: 42,
+  message: message ?? 'new message',
+});
+
+const mockMessage = {
+  messageId: 1,
+  message: 'first message',
+};
+
+const mockGetMessage = jest.fn().mockResolvedValue(mockMessage);
+const mockGetChannel = jest.fn().mockResolvedValue(mockChannel);
+
+const mockState = {
+  stores: {
+    sdkStore: {
+      sdk: {
+        getMessage: mockGetMessage,
+        groupChannel: {
+          getChannel: mockGetChannel,
+        },
+      },
+      initialized: true,
+    },
+    userStore: { user: { userId: 'test-user-id' } },
+  },
+  config: {
+    logger: console,
+    isOnline: true,
+    pubSub: {
+      publish: jest.fn(),
+    },
+    groupChannel: {
+      enableMention: true,
+      enableReactions: true,
+      replyType: 'THREAD',
+    },
+  },
+};
+
+jest.mock('../../../../../lib/Sendbird/context/hooks/useSendbird', () => ({
+  __esModule: true,
+  default: jest.fn(() => ({ state: mockState })),
+  useSendbird: jest.fn(() => ({ state: mockState })),
+}));
+
+jest.mock('../../../context/useThread');
+
+const mockStringSet = {
+  DATE_FORMAT__MESSAGE_CREATED_AT: 'p',
+};
+
+const mockLocalizationContext = {
+  stringSet: mockStringSet,
+};
+
+const defaultMockState = {
+  channelUrl: '',
+  message: null,
+  onHeaderActionClick: undefined,
+  onMoveToParentMessage: undefined,
+  onBeforeSendUserMessage: undefined,
+  onBeforeSendFileMessage: undefined,
+  onBeforeSendVoiceMessage: undefined,
+  onBeforeSendMultipleFilesMessage: undefined,
+  onBeforeDownloadFileMessage: undefined,
+  isMultipleFilesMessageEnabled: undefined,
+  filterEmojiCategoryIds: undefined,
+  currentChannel: undefined,
+  allThreadMessages: [
+    {
+      messageId: 2,
+      message: 'threaded message 1',
+      isUserMessage: () => true,
+    },
+  ],
+  localThreadMessages: [],
+  parentMessage: null,
+  channelState: ChannelStateTypes.INITIALIZED,
+  parentMessageState: ParentMessageStateTypes.INITIALIZED,
+  threadListState: ThreadListStateTypes.INITIALIZED,
+  hasMorePrev: false,
+  hasMoreNext: false,
+  emojiContainer: {} as EmojiContainer,
+  isMuted: false,
+  isChannelFrozen: false,
+  currentUserId: '',
+  typingMembers: [],
+  nicknamesMap: null,
+};
+
+const defaultMockActions = {
+  fetchPrevThreads: jest.fn((callback) => {
+    callback();
+  }),
+  fetchNextThreads: jest.fn((callback) => {
+    callback();
+  }),
+};
+
+describe('CreateChannelUI Integration Tests', () => {
+  const mockUseThread = useThreadModule.default as jest.Mock;
+
+  const renderComponent = (mockState = {}, mockActions = {}) => {
+    mockUseThread.mockReturnValue({
+      state: { ...defaultMockState, ...mockState },
+      actions: { ...defaultMockActions, ...mockActions },
+    });
+
+    return render(
+      <LocalizationContext.Provider value={mockLocalizationContext as any}>
+        <ThreadUI/>
+      </LocalizationContext.Provider>,
+    );
+  };
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('display initial state correctly', async () => {
+    await act(async () => {
+      renderComponent(
+        {
+          parentMessage: {
+            messageId: 1,
+            message: 'parent message',
+            isUserMessage: () => true,
+            isTextMessage: true,
+            createdAt: 0,
+            sender: {
+              userId: 'test-user-id',
+            },
+          },
+        },
+      );
+    });
+
+    expect(screen.getByText('parent message')).toBeInTheDocument();
+    expect(screen.getByText('threaded message 1')).toBeInTheDocument();
+  });
+
+  it('fetchPrevThread is correctly called when scroll is top', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+      getThreadedMessagesByTimestamp: () => ({
+        parentMessage,
+        threadedMessages: [
+          { messageId: 3, message: 'threaded message -1', isUserMessage: () => true },
+          { messageId: 4, message: 'threaded message 0', isUserMessage: () => true },
+        ],
+      }),
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          hasMorePrev: true,
+        },
+      );
+
+      container = result.container;
+    });
+
+    const scrollContainer = container.getElementsByClassName('sendbird-thread-ui--scroll')[0];
+    fireEvent.scroll(scrollContainer, { target: { scrollY: -1 } });
+
+    await waitFor(() => {
+      expect(defaultMockActions.fetchPrevThreads).toBeCalledTimes(1);
+    });
+  });
+
+  it('fetchNextThreads is correctly called when scroll is bottom', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+      getThreadedMessagesByTimestamp: () => ({
+        parentMessage,
+        threadedMessages: [
+          { messageId: 3, message: 'threaded message -1', isUserMessage: () => true },
+          { messageId: 4, message: 'threaded message 0', isUserMessage: () => true },
+        ],
+      }),
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          hasMoreNext: true,
+        },
+      );
+
+      container = result.container;
+    });
+
+    const scrollContainer = container.getElementsByClassName('sendbird-thread-ui--scroll')[0];
+    fireEvent.scroll(scrollContainer, { target: { scrollY: scrollContainer.scrollHeight + 1 } });
+
+    await waitFor(() => {
+      expect(defaultMockActions.fetchNextThreads).toBeCalledTimes(1);
+    });
+  });
+
+  it('show proper placeholder when ParentMessageStateTypes is NIL', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          parentMessageState: ParentMessageStateTypes.NIL,
+        },
+      );
+
+      container = result.container;
+    });
+
+    await waitFor(() => {
+      const placeholder = container.getElementsByClassName('placeholder-nil')[0];
+      expect(placeholder).not.toBe(undefined);
+    });
+
+  });
+
+  it('show proper placeholder when ParentMessageStateTypes is LOADING', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          parentMessageState: ParentMessageStateTypes.LOADING,
+        },
+      );
+
+      container = result.container;
+    });
+
+    await waitFor(() => {
+      const placeholder = container.getElementsByClassName('placeholder-loading')[0];
+      expect(placeholder).not.toBe(undefined);
+    });
+
+  });
+
+  it('show proper placeholder when ParentMessageStateTypes is INVALID', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          parentMessageState: ParentMessageStateTypes.INVALID,
+        },
+      );
+
+      container = result.container;
+    });
+
+    await waitFor(() => {
+      const placeholder = container.getElementsByClassName('placeholder-invalid')[0];
+      expect(placeholder).not.toBe(undefined);
+    });
+  });
+
+  it('show proper placeholder when ThreadListState is LOADING', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          threadListState: ThreadListStateTypes.LOADING,
+        },
+      );
+
+      container = result.container;
+    });
+
+    await waitFor(() => {
+      const placeholder = container.getElementsByClassName('placeholder-loading')[0];
+      expect(placeholder).not.toBe(undefined);
+    });
+  });
+
+  it('show proper placeholder when ThreadListState is INVALID', async () => {
+    let container;
+    const parentMessage = {
+      messageId: 1,
+      message: 'parent message',
+      isUserMessage: () => true,
+      isTextMessage: true,
+      createdAt: 0,
+      sender: {
+        userId: 'test-user-id',
+      },
+    };
+
+    await act(async () => {
+      const result = renderComponent(
+        {
+          parentMessage,
+          threadListState: ThreadListStateTypes.INVALID,
+        },
+      );
+
+      container = result.container;
+    });
+
+    await waitFor(() => {
+      const placeholder = container.getElementsByClassName('placeholder-invalid')[0];
+      expect(placeholder).not.toBe(undefined);
+    });
+  });
+
+});