adds preview test

test/preview.test.ts

@@ -0,0 +1,60 @@
+import { describe, it, beforeAll, afterAll, expect } from 'vitest';
+import fs from 'fs';
+import path from 'path';
+import { execSync } from 'child_process';
+import * as cheerio from 'cheerio';
+import * as rimraf from 'rimraf';
+import { utils } from '@reuters-graphics/graphics-bin';
+
+const DIST = path.join(__dirname, '../dist/');
+
+process.env.TESTING = 'true';
+
+const fetchAndParse = async (url: string) => {
+  const response = await fetch(url);
+
+  if (!response.ok) {
+    throw new Error(`HTTP error! Status: ${response.status}`);
+  }
+
+  return response.text();
+};
+
+beforeAll(() => {
+  rimraf.sync(DIST);
+});
+
+afterAll(() => {
+  rimraf.sync(DIST);
+});
+
+describe('GraphicsKit preview', () => {
+  it('should preview the app without error', async () => {
+    try {
+      execSync('pnpm preview', { stdio: 'inherit' });
+    } catch {
+      expect(false).toBe(true);
+    }
+    expect(true).toBe(true);
+  });
+
+  it('should have built the homepage locally', () => {
+    expect(fs.existsSync(path.join(DIST, 'index.html'))).toBe(true);
+  });
+
+  it('should have published the preview page', async () => {
+    const previewUrl = utils.getPkgProp('reuters.preview');
+    const html = await fetchAndParse(previewUrl);
+    expect(html).toBeTruthy();
+
+    const $ = cheerio.load(html);
+    expect($('html').attr('lang')).toBe('en');
+    expect($('meta[property=og:title]').attr('content')).toBe(
+      'Page title for social media'
+    );
+    expect($('meta[name=description]').attr('content')).toBe(
+      'Page description for search'
+    );
+    expect($('h1').text().trim()).toBe('A Reuters Graphics page');
+  });
+}, 90_000);