feat: Implement keyboard shortcuts system with UI management, add txt-to-pdf tests, and introduce a generic warning modal.

src/tests/txt-to-pdf.test.ts

@@ -0,0 +1,120 @@
+import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
+import { txtToPdf, setupTxtToPdfTool } from '@/js/logic/txt-to-pdf';
+import * as ui from '@/js/ui';
+import * as helpers from '@/js/utils/helpers';
+import { state } from '@/js/state';
+import { PDFDocument as PDFLibDocument } from 'pdf-lib';
+
+// Mocks
+vi.mock('@/js/ui', () => ({
+    showLoader: vi.fn(),
+    hideLoader: vi.fn(),
+    showAlert: vi.fn(),
+}));
+
+vi.mock('@/js/utils/helpers', () => ({
+    downloadFile: vi.fn(),
+    hexToRgb: vi.fn(() => ({ r: 0, g: 0, b: 0 })),
+}));
+
+vi.mock('pdf-lib', () => ({
+    PDFDocument: {
+        create: vi.fn(),
+    },
+    StandardFonts: {
+        Helvetica: 'Helvetica',
+    },
+    PageSizes: {
+        A4: [595.28, 841.89],
+    },
+    rgb: vi.fn(),
+}));
+
+vi.mock('jszip', () => {
+    return {
+        default: vi.fn().mockImplementation(() => ({
+            file: vi.fn(),
+            generateAsync: vi.fn().mockResolvedValue(new Blob()),
+        })),
+    };
+});
+
+describe('Text to PDF Tool', () => {
+    let mockPdfDoc: any;
+    let mockPage: any;
+    let mockFont: any;
+
+    beforeEach(() => {
+        document.body.innerHTML = `
+      <button id="txt-mode-upload-btn"></button>
+      <button id="txt-mode-text-btn"></button>
+      <div id="txt-upload-panel"></div>
+      <div id="txt-text-panel" class="hidden"></div>
+      <button id="process-btn"></button>
+      <select id="font-family"><option value="Helvetica">Helvetica</option></select>
+      <input id="font-size" value="12" />
+      <select id="page-size"><option value="A4">A4</option></select>
+      <input id="text-color" value="#000000" />
+      <textarea id="text-input"></textarea>
+    `;
+
+        mockPage = {
+            getSize: vi.fn(() => ({ width: 595.28, height: 841.89 })),
+            drawText: vi.fn(),
+            getHeight: vi.fn(() => 841.89),
+        };
+
+        mockFont = {
+            widthOfTextAtSize: vi.fn(() => 10),
+        };
+
+        mockPdfDoc = {
+            embedFont: vi.fn().mockResolvedValue(mockFont),
+            addPage: vi.fn(() => mockPage),
+            save: vi.fn().mockResolvedValue(new Uint8Array([])),
+        };
+
+        vi.mocked(PDFLibDocument.create).mockResolvedValue(mockPdfDoc);
+        state.files = [];
+    });
+
+    afterEach(() => {
+        vi.clearAllMocks();
+    });
+
+    it('setupTxtToPdfTool should attach onclick listener to process-btn', async () => {
+        const processBtn = document.getElementById('process-btn');
+        expect(processBtn?.onclick).toBeNull();
+
+        await setupTxtToPdfTool();
+
+        expect(processBtn?.onclick).toBeDefined();
+    });
+
+    it('txtToPdf should handle text input mode', async () => {
+        // Switch to text mode (simulate UI state)
+        document.getElementById('txt-upload-panel')?.classList.add('hidden');
+        document.getElementById('txt-text-panel')?.classList.remove('hidden');
+        (document.getElementById('text-input') as HTMLTextAreaElement).value = 'Hello World';
+
+        await txtToPdf();
+
+        expect(ui.showLoader).toHaveBeenCalled();
+        expect(PDFLibDocument.create).toHaveBeenCalled();
+        expect(mockPdfDoc.addPage).toHaveBeenCalled();
+        expect(mockPage.drawText).toHaveBeenCalled();
+        expect(helpers.downloadFile).toHaveBeenCalled();
+        expect(ui.hideLoader).toHaveBeenCalled();
+    });
+
+    it('txtToPdf should show alert if text input is empty', async () => {
+        document.getElementById('txt-upload-panel')?.classList.add('hidden');
+        document.getElementById('txt-text-panel')?.classList.remove('hidden');
+        (document.getElementById('text-input') as HTMLTextAreaElement).value = '   ';
+
+        await txtToPdf();
+
+        expect(ui.showAlert).toHaveBeenCalledWith('Input Required', 'Please enter some text to convert.');
+        expect(PDFLibDocument.create).not.toHaveBeenCalled();
+    });
+});