adding tests

__tests__/scripts.test.js

@@ -1,21 +1,104 @@
-import { render, screen, fireEvent, waitFor } from '@testing-library/react';
-import '@testing-library/jest-dom';
-import Home from "../src/app/page";
-
-jest.mock('../src/app/scripts', () => ({
-    customLog: jest.fn(),
-    customLogClear: jest.fn(),
-}));
+import { render, fireEvent, screen } from '@testing-library/react';
+import { 
+    customLog, 
+    customLogClear, 
+    getTranslation, 
+    isInputValidRegex, 
+    isInputFilled, 
+    downloadLPFormatting, 
+    downloadLP, 
+    calculate_click 
+} from '../src/app/scripts';
+import Home from '../src/app/page'
+import text from '../src/app/lang';
 
+// Mocking GLPKAPI and console log
 jest.mock('../src/solver/glpk.min.js', () => ({
     LPF_ECOND: 2,
 }));
 
-test('render home page', () => {
-    // render website
+// Mocking console.log
+const consoleLogMock = jest.spyOn(console, 'log').mockImplementation(() => {});
+
+beforeEach(() => {
+    document.body.innerHTML = `
+      <div>
+        <select id="language_current">
+          <option value="eng">English</option>
+        </select>
+        <textarea id="objective"></textarea>
+        <textarea id="subject"></textarea>
+        <textarea id="bounds"></textarea>
+        <textarea id="vars"></textarea>
+        <select id="maxminswitch">
+          <option value="maximize">Maximize</option>
+          <option value="minimize">Minimize</option>
+        </select>
+        <div id="out"></div>
+      </div>
+    `;
+    jest.clearAllMocks(); // Clear any previous mocks
+});
+
+test('customLog should append message to output box', () => {
+    const message = 'Test message';
+    customLog(message);
+    const outputElement = document.getElementById('out');
+    expect(outputElement.innerHTML).toContain(message);
+});
+
+test('customLogClear should clear the output box', () => {
+    const message = 'Test message';
+    customLog(message);
+    customLogClear();
+    const outputElement = document.getElementById('out');
+    expect(outputElement.innerHTML).toBe('');
+});
+
+test('getTranslation should return translation based on selected language', () => {
+    const result = getTranslation('header_title');
+    expect(result).toBe(text('eng', 'header_title')); // Assuming text function provides correct translation
+});
+
+test('isInputValidRegex should validate input regex correctly', () => {
+    expect(isInputValidRegex("x + y", "+1 x + 2 y <= 15\n+3 x + 1 y <= 20", "x >= 0\ny >= 0", "x\ny")).toBe(true);
+    expect(isInputValidRegex("x + y", "+1 x + 2 y <= 15\n+3 x + 1 y <= 20", "x >= 0\ny >= 0", "")).toBe(false); // Invalid objective
+});
+
+test('isInputFilled should check for filled inputs', () => {
+    expect(isInputFilled('3x + 5y', 'x + y <= 10', 'x <= 5', 'x\ny')).toBe(true);
+    expect(isInputFilled('', 'x + y <= 10', 'x <= 5', 'x\ny')).toBe(false); // Objective empty
+});
+
+test('downloadLPFormatting should format LP correctly', () => {
+    const formattedLP = downloadLPFormatting('3x + 5y', 'x + y <= 10', 'x <= 5');
+    expect(formattedLP).toContain('obj: 3x + 5y');
+    expect(formattedLP).toContain('Subject To');
+    expect(formattedLP).toContain('Bounds');
+});
+
+test('calculate_click should display "Calculating" in the output box', () => {
     render(<Home />);
 
-    // check if text is in document
-    const headingElement = screen.getByText(/OR-Tool/i);  // text search in document
-    expect(headingElement).toBeInTheDocument();
+    // Spy on customLog and customLogClear to prevent actual logging and check the calls
+    const mockClear = jest.spyOn({ customLogClear }, 'customLogClear').mockImplementation();
+    const mockLog = jest.spyOn({ customLog }, 'customLog').mockImplementation();
+
+    // Set valid inputs
+    document.getElementById('objective').value = '3x + 5y';
+    document.getElementById('subject').value = 'x + y <= 10';
+    document.getElementById('bounds').value = 'x <= 5';
+    document.getElementById('vars').value = 'x\ny';
+
+    // Simuliere den Button-Klick, der die Berechnung startet
+    fireEvent.click(screen.getByText('Calculate'));
+
+    // Check the contents of out box
+    const outputElement = document.getElementById('out');
+    expect(outputElement.innerHTML).toContain('Calculating');
+
+    // Clear mock
+    mockClear.mockRestore();
+    mockLog.mockRestore();
 });
+