diff --git a/app/actions/remote/search.test.ts b/app/actions/remote/search.test.ts
new file mode 100644
index 000000000..0c40643fb
--- /dev/null
+++ b/app/actions/remote/search.test.ts
@@ -0,0 +1,161 @@
+// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
+// See LICENSE.txt for license information.
+
+/* eslint-disable max-lines */
+
+import {SYSTEM_IDENTIFIERS} from '@constants/database';
+import DatabaseManager from '@database/manager';
+import NetworkManager from '@managers/network_manager';
+import TestHelper from '@test/test_helper';
+
+import {
+    fetchRecentMentions,
+    searchPosts,
+    searchFiles,
+} from './search';
+
+import type ServerDataOperator from '@database/operator/server_data_operator';
+
+const serverUrl = 'baseHandler.test.com';
+let operator: ServerDataOperator;
+
+const teamId = 'teamid1';
+const channelId = 'channelid1';
+const channel: Channel = {
+    id: channelId,
+    display_name: 'channelname',
+    team_id: teamId,
+    total_msg_count: 0,
+    type: 'D',
+} as Channel;
+
+const user1 = {id: 'userid1', username: 'user1', email: 'user1@mattermost.com', roles: ''} as UserProfile;
+const post1 = {...TestHelper.fakePost(channelId), id: 'postid1'};
+
+const fileInfo1: FileInfo = {
+    id: 'fileid1',
+    clientId: 'clientid',
+    localPath: 'path1',
+    channel_id: channelId,
+    post_id: post1.id,
+} as FileInfo;
+
+const throwFunc = () => {
+    throw Error('error');
+};
+
+let mockGetIsCRTEnabled: jest.Mock;
+jest.mock('@queries/servers/thread', () => {
+    const original = jest.requireActual('@queries/servers/thread');
+    mockGetIsCRTEnabled = jest.fn(() => true);
+    return {
+        ...original,
+        getIsCRTEnabled: mockGetIsCRTEnabled,
+    };
+});
+
+const mockClient = {
+    searchPostsWithParams: jest.fn(() => ({posts: {[post1.id]: post1}, order: [post1.id], matches: {[post1.id]: post1.message}})),
+    getProfilesByIds: jest.fn((ids: string[]) => (ids.map((id) => ({...user1, id})))),
+    getChannel: jest.fn((_channelId: string) => ({id: _channelId, name: 'channel1', creatorId: user1.id, total_msg_count: 100})),
+    getMyChannelMember: jest.fn((_channelId: string) => ({id: user1.id + '-' + _channelId, user_id: user1.id, channel_id: _channelId, roles: '', msg_count: 100, mention_count: 0})),
+    searchFiles: jest.fn(() => ({file_infos: {[fileInfo1.id as string]: fileInfo1}, order: [fileInfo1.id]})),
+};
+
+beforeAll(() => {
+    // eslint-disable-next-line
+    // @ts-ignore
+    NetworkManager.getClient = () => mockClient;
+});
+
+beforeEach(async () => {
+    await DatabaseManager.init([serverUrl]);
+    operator = DatabaseManager.serverDatabases[serverUrl]!.operator;
+});
+
+afterEach(async () => {
+    await DatabaseManager.destroyServerDatabase(serverUrl);
+});
+
+describe('search', () => {
+    it('fetchRecentMentions - handle not found database', async () => {
+        const result = await fetchRecentMentions('foo');
+        expect(result).toBeDefined();
+        expect(result.error).toBeDefined();
+    });
+
+    it('fetchRecentMentions - base case', async () => {
+        await operator.handleUsers({users: [user1], prepareRecordsOnly: false});
+        await operator.handleSystem({systems: [{id: SYSTEM_IDENTIFIERS.CURRENT_USER_ID, value: user1.id}], prepareRecordsOnly: false});
+
+        const result = await fetchRecentMentions(serverUrl);
+        expect(result).toBeDefined();
+        expect(result.error).toBeUndefined();
+        expect(result.posts).toBeDefined();
+        expect(result.posts?.length).toBe(1);
+        expect(result.order).toBeDefined();
+        expect(result.order?.length).toBe(1);
+    });
+
+    it('fetchRecentMentions - no current user', async () => {
+        await operator.handleSystem({systems: [{id: SYSTEM_IDENTIFIERS.CURRENT_USER_ID, value: user1.id}], prepareRecordsOnly: false});
+
+        const result = await fetchRecentMentions(serverUrl);
+        expect(result).toBeDefined();
+        expect(result.error).toBeUndefined();
+        expect(result.posts).toBeDefined();
+        expect(result.posts?.length).toBe(0);
+        expect(result.order).toBeDefined();
+        expect(result.order?.length).toBe(0);
+    });
+
+    it('fetchRecentMentions - search error', async () => {
+        mockClient.searchPostsWithParams.mockImplementationOnce(jest.fn(throwFunc));
+        await operator.handleUsers({users: [user1], prepareRecordsOnly: false});
+        await operator.handleSystem({systems: [{id: SYSTEM_IDENTIFIERS.CURRENT_USER_ID, value: user1.id}], prepareRecordsOnly: false});
+
+        const result = await fetchRecentMentions(serverUrl);
+        expect(result).toBeDefined();
+        expect(result.error).toBeDefined();
+    });
+
+    it('searchPosts - handle not found database', async () => {
+        const result = await searchPosts('foo', '', {terms: 'test', is_or_search: true});
+        expect(result).toBeDefined();
+        expect(result.error).toBeDefined();
+    });
+
+    it('searchPosts - base case', async () => {
+        await operator.handleUsers({users: [user1], prepareRecordsOnly: false});
+        await operator.handleSystem({systems: [{id: SYSTEM_IDENTIFIERS.CURRENT_USER_ID, value: user1.id}], prepareRecordsOnly: false});
+
+        const result = await searchPosts(serverUrl, '', {terms: 'test', is_or_search: true});
+        expect(result).toBeDefined();
+        expect(result.error).toBeUndefined();
+        expect(result.posts).toBeDefined();
+        expect(result.posts?.length).toBe(1);
+        expect(result.order).toBeDefined();
+        expect(result.order?.length).toBe(1);
+    });
+
+    it('searchFiles - handle request error', async () => {
+        mockClient.searchFiles.mockImplementationOnce(jest.fn(throwFunc));
+        const result = await searchFiles(serverUrl, '', {terms: 'test', is_or_search: true});
+        expect(result).toBeDefined();
+        expect(result.error).toBeDefined();
+    });
+
+    it('searchFiles - base case', async () => {
+        await operator.handleUsers({users: [user1], prepareRecordsOnly: false});
+        await operator.handleSystem({systems: [{id: SYSTEM_IDENTIFIERS.CURRENT_TEAM_ID, value: teamId}, {id: SYSTEM_IDENTIFIERS.CURRENT_USER_ID, value: user1.id}], prepareRecordsOnly: false});
+        const channelModels = await operator.handleChannel({channels: [channel], prepareRecordsOnly: false});
+
+        const result = await searchFiles(serverUrl, '', {terms: 'test', is_or_search: true}, channelModels[0]);
+        expect(result).toBeDefined();
+        expect(result.error).toBeUndefined();
+        expect(result.files).toBeDefined();
+        expect(result.files?.length).toBe(1);
+        expect(result.channels).toBeDefined();
+        expect(result.channels?.length).toBe(1);
+    });
+});