add a11y color tests

.gitignore

@@ -12,3 +12,7 @@ temp
 .env
 GITHUB_ENV
 playground/**.d.ts
+/test-results/
+/playwright-report/
+/blob-report/
+/playwright/.cache/

package.json

@@ -10,6 +10,8 @@
     "prepublishOnly": "nr build",
     "bump": "esno scripts/bump.ts",
     "test": "vitest",
+    "test:e2e": "playwright test",
+    "test:e2e:ui": "playwright test --ui",
     "fetch": "esno scripts/fetch.ts && eslint . --fix",
     "fetch:force": "esno scripts/fetch.ts --force && eslint . --fix",
     "typecheck": "tsc --noEmit",
@@ -21,6 +23,8 @@
     "@antfu/eslint-config": "^2.16.1",
     "@antfu/ni": "^0.21.12",
     "@antfu/utils": "^0.7.7",
+    "@axe-core/playwright": "^4.9.1",
+    "@playwright/test": "^1.44.1",
     "@types/adm-zip": "^0.5.5",
     "@types/cson": "^7.20.3",
     "@types/js-yaml": "^4.0.9",

playground/src/App.vue

@@ -215,8 +215,9 @@ if (import.meta.hot) {
           <button
             v-for="g of filteredGrammars"
             :key="g.name"
-            border="b base" px3
-            py1 text-left
+            :data-testid="g.name" border="b base"
+            px3 py1
+            text-left
             :class="g.name === grammar ? 'bg-active text-primary' : 'text-faded'"
             @click="grammar = g.name"
           >
@@ -238,6 +239,7 @@ if (import.meta.hot) {
           <button
             v-for="t of filteredThemes"
             :key="t.name"
+            :data-testid="t.name"
             border="b base" px3 py1 text-left
             :class="t.name === theme ? 'bg-active text-purple' : 'text-faded'"
             @click="theme = t.name"
@@ -302,7 +304,7 @@ if (import.meta.hot) {
           {{ error }}
         </div>
         <div relative of-x-scroll flex-none>
-          <div v-html="output" />
+          <div id="code-output" v-html="output" />
           <textarea
             id="input"
             v-model="input"

playwright.config.ts

@@ -0,0 +1,50 @@
+import process from 'node:process'
+import { defineConfig, devices } from '@playwright/test'
+
+/**
+ * Read environment variables from file.
+ * https://github.com/motdotla/dotenv
+ */
+// require('dotenv').config();
+
+/**
+ * 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 : 10,
+  /* Reporter to use. See https://playwright.dev/docs/test-reporters */
+  reporter: [['dot'], ['json', { outputFile: 'test-results.json' }]], // ['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://localhost:3333',
+
+    /* Collect trace when retrying the failed test. See https://playwright.dev/docs/trace-viewer */
+    trace: 'on-first-retry',
+  },
+
+  quiet: true,
+
+  /* Configure projects for major browsers */
+  projects: [
+    {
+      name: 'chromium',
+      use: { ...devices['Desktop Chrome'] },
+    },
+  ],
+
+  /* Run your local dev server before starting the tests */
+  webServer: {
+    command: 'pnpm play',
+    url: 'http://localhost:3333',
+    reuseExistingServer: !process.env.CI,
+  },
+})