Replace custom checks from the server script to use concurrently

jest.conf/visual.index.js

@@ -1,30 +1,122 @@
 const path = require('node:path');
+const http = require('http');
+const puppeteer = require('puppeteer');
 
-const moduleNameMapper = {
-  '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga|css)$': path.resolve(
-    __dirname,
-    './fileMock.js'
-  ),
+/* eslint-disable no-console */
+
+const SERVER_URL = 'http://localhost:4000/testing-playground';
+const SERVER_TIMEOUT = 360000;
+const WAIT_FOR_SELECTOR = '#testing-playground';
+let setupDone = false;
+
+const waitForServer = async (url, timeout = 30000) => {
+  const start = Date.now();
+  let waitingLogged = false;
+
+  const checkServer = () => {
+    return new Promise((resolve, reject) => {
+      const req = http.get(url, res => {
+        if (res.statusCode === 200) {
+          resolve(true);
+        } else {
+          reject(new Error(`Server responded with status code: ${res.statusCode}`));
+        }
+      });
+
+      req.on('error', () => {
+        if (!waitingLogged) {
+          console.error('Waiting for server to respond.');
+          waitingLogged = true;
+        }
+        resolve(false);
+      });
+
+      req.end();
+    });
+  };
+
+  while (Date.now() - start < timeout) {
+    try {
+      const isServerUp = await checkServer();
+      if (isServerUp) {
+        return;
+      }
+    } catch (err) {
+      console.error(err.message);
+    }
+    await new Promise(resolve => setTimeout(resolve, 1000));
+  }
+  throw new Error('Server did not start within the timeout period');
+};
+
+const checkPageLoad = async (url, timeout = 30000) => {
+  const browser = await puppeteer.launch();
+  const page = await browser.newPage();
+
+  try {
+    await page.goto(url, { waitUntil: 'networkidle2', timeout });
+    await page.waitForSelector(WAIT_FOR_SELECTOR, { timeout });
+    console.log('Visual testing playground is loaded.');
+  } catch (error) {
+    throw new Error('Failed to load visual testing playground.');
+  } finally {
+    await browser.close();
+  }
+};
+
+const validatePercyToken = () => {
+  if (!process.env.PERCY_TOKEN) {
+    throw new Error(
+      'PERCY_TOKEN environment variable is not set. Please set it to run visual tests.'
+    );
+  }
+};
+
+const runServerChecks = async () => {
+  if (setupDone) return;
+  setupDone = true;
+  try {
+    await waitForServer(SERVER_URL, SERVER_TIMEOUT);
+    await checkPageLoad(SERVER_URL, SERVER_TIMEOUT);
+    console.log('Server and testing playground are up and running');
+  } catch (error) {
+    console.error(error);
+    process.exit(1);
+  }
 };
 
-module.exports = {
-  rootDir: path.resolve(__dirname, '..'),
-  preset: 'jest-puppeteer',
-  testTimeout: 50000,
-  moduleFileExtensions: ['js', 'json', 'vue'],
-  moduleNameMapper,
-  transform: {
-    '^.+\\.js$': require.resolve('babel-jest'),
-    '^.+\\.vue$': require.resolve('vue-jest'),
-  },
-  snapshotSerializers: ['jest-serializer-vue'],
-  globals: {
-    HOST: 'http://localhost:4000/',
-    'vue-jest': {
-      hideStyleWarn: true,
-      experimentalCSSCompile: true,
-    },
-  },
-  setupFilesAfterEnv: [path.resolve(__dirname, './visual.setup')],
-  verbose: true,
+module.exports = async () => {
+  try {
+    validatePercyToken();
+    await runServerChecks();
+    return {
+      rootDir: path.resolve(__dirname, '..'),
+      preset: 'jest-puppeteer',
+      testTimeout: 50000,
+      moduleFileExtensions: ['js', 'json', 'vue'],
+      moduleNameMapper: {
+        '\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga|css)$': path.resolve(
+          __dirname,
+          './fileMock.js'
+        ),
+      },
+      transform: {
+        '^.+\\.js$': require.resolve('babel-jest'),
+        '^.+\\.vue$': require.resolve('vue-jest'),
+      },
+      snapshotSerializers: ['jest-serializer-vue'],
+      globals: {
+        HOST: 'http://localhost:4000/',
+        'vue-jest': {
+          hideStyleWarn: true,
+          experimentalCSSCompile: true,
+        },
+      },
+      setupFilesAfterEnv: [path.resolve(__dirname, './visual.setup')],
+      verbose: true,
+    };
+  } catch (error) {
+    console.error(error);
+    process.exit(1);
+  }
 };

package.json

@@ -16,9 +16,10 @@
     "precompile-svgs": "node utils/precompileSvgs/index.js && yarn run pregenerate",
     "precompile-custom-svgs": "node utils/precompileSvgs/index.js --custom && yarn run pregenerate",
     "_lint-watch-fix": "yarn lint -w -m",
+    "test:percy": "PERCY_LOGLEVEL=error npx percy exec -v -- jest --config jest.conf/visual.index.js -i ./lib/buttons-and-links/__tests__/KButton.spec.js",
     "test": "yarn test:unit && yarn test:visual",
     "test:unit": "jest --config=jest.conf/index.js",
-    "test:visual": "JEST_PUPPETEER_CONFIG=./jest-puppeteer.config.js node startVisualTests.js",
+    "test:visual": "concurrently --kill-others --success first --names \"SERVER,TEST\" -c \"bgCyan.bold,bgYellow.bold\" \"yarn dev-only > /dev/null 2>&1\" \"yarn test:percy\"",
     "_api-watch": "chokidar \"**/lib/**\" -c \"node utils/extractApi.js\""
   },
   "files": [
@@ -49,6 +50,7 @@
     "babel-jest": "^29.7.0",
     "browserslist-config-kolibri": "0.16.0-dev.7",
     "chokidar-cli": "^3.0.0",
+    "concurrently": "^8.2.2",
     "consola": "^2.15.3",
     "eslint-import-resolver-nuxt": "^1.0.1",
     "globby": "^6.1.0",