Add FormattingButtons test

test/components/views/rooms/wysiwyg_composer/FormattingButtons-test.tsx

@@ -0,0 +1,77 @@
+/*
+Copyright 2022 The Matrix.org Foundation C.I.C.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+import React from 'react';
+import { render, screen } from "@testing-library/react";
+import userEvent from '@testing-library/user-event';
+
+import { FormattingButtons } from "../../../../../src/components/views/rooms/wysiwyg_composer/FormattingButtons";
+
+describe('FormattingButtons', () => {
+    const wysiwyg = {
+        bold: jest.fn(),
+        italic: jest.fn(),
+        underline: jest.fn(),
+        strikeThrough: jest.fn(),
+    } as any;
+
+    const formattingStates = {
+        bold: 'reversed',
+        italic: 'reversed',
+        underline: 'enabled',
+        strikeThrough: 'enabled',
+    } as any;
+
+    afterEach(() => {
+        jest.resetAllMocks();
+    });
+
+    it('Should have the correspond CSS classes', () => {
+        // When
+        render(<FormattingButtons wysiwyg={wysiwyg} formattingStates={formattingStates} />);
+
+        // Then
+        expect(screen.getByLabelText('Bold')).toHaveClass('mx_FormattingButtons_active');
+        expect(screen.getByLabelText('Italic')).toHaveClass('mx_FormattingButtons_active');
+        expect(screen.getByLabelText('Underline')).not.toHaveClass('mx_FormattingButtons_active');
+        expect(screen.getByLabelText('Strikethrough')).not.toHaveClass('mx_FormattingButtons_active');
+    });
+
+    it('Should call wysiwyg function on button click', () => {
+        // When
+        render(<FormattingButtons wysiwyg={wysiwyg} formattingStates={formattingStates} />);
+        screen.getByLabelText('Bold').click();
+        screen.getByLabelText('Italic').click();
+        screen.getByLabelText('Underline').click();
+        screen.getByLabelText('Strikethrough').click();
+
+        // Then
+        expect(wysiwyg.bold).toHaveBeenCalledTimes(1);
+        expect(wysiwyg.italic).toHaveBeenCalledTimes(1);
+        expect(wysiwyg.underline).toHaveBeenCalledTimes(1);
+        expect(wysiwyg.strikeThrough).toHaveBeenCalledTimes(1);
+    });
+
+    it('Should display the tooltip on mouse over', async () => {
+        // When
+        const user = userEvent.setup();
+        render(<FormattingButtons wysiwyg={wysiwyg} formattingStates={formattingStates} />);
+        await user.hover(screen.getByLabelText('Bold'));
+
+        // Then
+        expect(await screen.findByText('Bold')).toBeTruthy();
+    });
+});