Add Playwright tests for Play tab.

Author: solarday

test/production/play-tab.spec.ts

@@ -0,0 +1,35 @@
+import { test, expect } from '@playwright/test';
+
+test.describe('Solutions tab functionality', () => {
+    test.beforeEach(async ({ page }) => {
+        await page.goto('/');
+        await page.waitForSelector('button.ch2-btn.ch2-btn-primary');
+        await page.click('button.ch2-btn.ch2-btn-primary');
+        const navbar = page.locator('[data-test="header"]');
+        const solutionsButton = navbar.getByText('Play').first();
+        await expect(solutionsButton).toBeVisible();
+        await solutionsButton.click();
+    });
+
+    test('Click on "Play" button should open the related page', async ({ page }) => {
+        const multiplatformButton = page.getByText('Playground').first();
+        await expect(multiplatformButton).toBeVisible();
+        await multiplatformButton.click();
+        await expect(page.url()).toContain('https://play.kotlinlang.org/');
+    });
+
+    test('Click on "Examples" button should open the related page', async ({ page }) => {
+        const multiplatformButton = page.getByText('Examples').first();
+        await expect(multiplatformButton).toBeVisible();
+        await multiplatformButton.click();
+        await expect(page.url()).toContain('https://play.kotlinlang.org/byExample');
+
+    });
+
+    test('Click on "Koans" button should open the related page', async ({ page }) => {
+        const multiplatformButton = page.getByText('Koans');
+        await expect(multiplatformButton).toBeVisible();
+        await multiplatformButton.click();
+        await expect(page.url()).toContain('https://play.kotlinlang.org/koans');
+    });
+});