Initialised Playwright for E2E tests plus updated README with details…

… on Playwright

README.md

@@ -61,3 +61,22 @@ dotnet test --collect:"XPlat Code Coverage" --settings coverlet.runsettings
 ```
 
 This will pull in the exclusions such as the .cshtml files and will replicate coverage in the GitHub Actions.
+
+## End to end/Smoke testing
+
+End to end tests are ran using [Playwright](https://playwright.dev/).
+
+To run the tests, run the following commands:
+- Run the local web app.
+- Navigate to the correct folder, be it:
+  - ``cd tests/Dfe.EarlyYearsQualification.E2ETests/playwright`` for the E2E tests.
+  - ``cd tests/Dfe.EarlyYearsQualification.SmokeTests/playwright`` for the smoke tests.
+- Tell Node Version Manager that you want the latest version with: ``nvm use node --lts``
+- Run the tests with: ``npx playwright test``
+
+### Problems with Safari?
+If you notice you are having issues with running Safari tests locally and them failing then there is a fix.
+
+This is happening due to because Safari strictly enforcing the `upgrade-insecure-requests` header. This is converting the HTTP requests to HTTPS.
+
+To fix this, comment out this line in the web app's [Program.cs](https://github.com/DFE-Digital/check-an-early-years-qualification/blob/main/src/Dfe.EarlyYearsQualification.Web/Program.cs#L138-L140). This will remove the header from all requests and should let Safari use HTTP.

tests/Dfe.EarlyYearsQualification.E2ETests/playwright/package.json

@@ -0,0 +1,14 @@
+{
+  "name": "playwright",
+  "version": "1.0.0",
+  "main": "index.js",
+  "scripts": {},
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "description": "",
+  "devDependencies": {
+    "@playwright/test": "^1.49.0",
+    "@types/node": "^22.10.1"
+  }
+}

tests/Dfe.EarlyYearsQualification.E2ETests/playwright/playwright.config.ts

@@ -0,0 +1,79 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// import dotenv from 'dotenv';
+// import path from 'path';
+// dotenv.config({ path: path.resolve(__dirname, '.env') });
+
+/**
+ * See https://playwright.dev/docs/test-configuration.
+ */
+export default defineConfig({
+  testDir: './tests',
+  /* Run tests in files in parallel */
+  fullyParallel: true,
+  /* Fail the build on CI if you accidentally left test.only in the source code. */
+  forbidOnly: !!process.env.CI,
+  /* Retry on CI only */
+  retries: process.env.CI ? 2 : 0,
+  /* Opt out of parallel tests on CI. */
+  workers: process.env.CI ? 1 : undefined,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: 'html',
+  /* Shared settings for all the projects below. See https://playwright.dev/docs/api/class-testoptions. */
+  use: {
+    /* Base URL to use in actions like `await page.goto('/')`. */
+    // baseURL: 'http://127.0.0.1:3000',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'] },
+    },
+
+    {
+      name: 'webkit',
+      use: { ...devices['Desktop Safari'] },
+    },
+
+    /* Test against mobile viewports. */
+    // {
+    //   name: 'Mobile Chrome',
+    //   use: { ...devices['Pixel 5'] },
+    // },
+    // {
+    //   name: 'Mobile Safari',
+    //   use: { ...devices['iPhone 12'] },
+    // },
+
+    /* Test against branded browsers. */
+    // {
+    //   name: 'Microsoft Edge',
+    //   use: { ...devices['Desktop Edge'], channel: 'msedge' },
+    // },
+    // {
+    //   name: 'Google Chrome',
+    //   use: { ...devices['Desktop Chrome'], channel: 'chrome' },
+    // },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  // webServer: {
+  //   command: 'npm run start',
+  //   url: 'http://127.0.0.1:3000',
+  //   reuseExistingServer: !process.env.CI,
+  // },
+});

tests/Dfe.EarlyYearsQualification.E2ETests/playwright/tests/example.spec.ts

@@ -0,0 +1,18 @@
+import { test, expect } from '@playwright/test';
+
+test('has title', async ({ page }) => {
+  await page.goto('https://playwright.dev/');
+
+  // Expect a title "to contain" a substring.
+  await expect(page).toHaveTitle(/Playwright/);
+});
+
+test('get started link', async ({ page }) => {
+  await page.goto('https://playwright.dev/');
+
+  // Click the get started link.
+  await page.getByRole('link', { name: 'Get started' }).click();
+
+  // Expects page to have a heading with the name of Installation.
+  await expect(page.getByRole('heading', { name: 'Installation' })).toBeVisible();
+});