[RTE] Unit tests for RichTextSendBox (#4551)

* Tests

* Update tests

* Remove inputbox test for now.

* CC

* CC

packages/react-components/src/components/RichTextEditor/RichTextSendBox.test.tsx

@@ -5,8 +5,7 @@ import React from 'react';
 import { RichTextSendBox } from './RichTextSendBox';
 /* @conditional-compile-remove(rich-text-editor) */
 import { renderWithLocalization, createTestLocale } from '../utils/testUtils';
-import { render, waitFor, fireEvent } from '@testing-library/react';
-import { screen } from '@testing-library/react';
+import { render, waitFor, fireEvent, screen } from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import { registerIcons } from '@fluentui/react';
 
@@ -28,6 +27,58 @@ const icons: {
   chevrondown: <></>
 };
 
+describe('RichTextSendBox should only call onSendMessage when there is content and it is not disabled', () => {
+  beforeAll(() => {
+    registerIcons({
+      icons: icons
+    });
+  });
+  test('onSendMessage should not be called when message is empty', async () => {
+    let called = false;
+    render(
+      <RichTextSendBox
+        onSendMessage={async (): Promise<void> => {
+          called = true;
+          return Promise.resolve();
+        }}
+      />
+    );
+    // Find and click the send button
+    const sendButton = await screen.findByRole('button', {
+      name: 'Send message'
+    });
+    fireEvent.click(sendButton);
+    // Check that onSendMessage was not called
+    expect(called).toBeFalsy();
+  });
+  test('onSendMessage should not be called when disabled', async () => {
+    let called = false;
+    render(
+      <RichTextSendBox
+        disabled={true}
+        onSendMessage={async (): Promise<void> => {
+          called = true;
+          return Promise.resolve();
+        }}
+      />
+    );
+    // Find the input field
+    const editorDiv = screen.queryByTestId('rooster-rich-text-editor');
+    // fix for an issue when contentEditable is not set to RoosterJS for tests
+    editorDiv?.setAttribute('contentEditable', 'true');
+    if (editorDiv === null) {
+      fail('Editor div not found');
+    }
+    // Find and click the send button
+    const sendButton = await screen.findByRole('button', {
+      name: 'Send message'
+    });
+    fireEvent.click(sendButton);
+    // Check that onSendMessage was not called
+    expect(called).toBeFalsy();
+  });
+});
+
 describe('RichTextSendBox should return text correctly', () => {
   beforeAll(() => {
     registerIcons({