Add Vitest providerOptions for arm64 Linux

The getProviderOptions() helper will emit a warning if running on arm64
Linux without an apt-installed /usr/bin/chromium present.

The plan is to eventually see if I can contribute this logic and some
documentation to https://github.com/webdriverio/webdriverio.

strcalc/src/main/frontend/vite.config.js

@@ -2,6 +2,8 @@ import handlebarsPrecompiler from
   './plugins/rollup-plugin-handlebars-precompiler.js'
 import { defineConfig } from 'vite'
 import { configDefaults } from 'vitest/config'
+import fs from 'node:fs'
+import os from 'node:os'
 import path from 'node:path/posix'
 
 const BUILD_DIR = path.resolve('../../../build/')
@@ -16,6 +18,54 @@ export function buildDir(relativePath) {
   return path.resolve(BUILD_DIR, relativePath)
 }
 
+const ARM64_LINUX_WARNING = [
+  '',
+  'WARNING:',
+  '-------',
+  'Neither Google Chrome nor Chrome for Testing are available for arm64 Linux.',
+  'Also, the snap versions of Chromium, Chromedriver, and Firefox are not',
+  'controllable by the webdriverio npm. For these reasons, you will need to',
+  'install non-snap versions of Chromium and/or Firefox to run the browser',
+  'tests.',
+  '',
+  'Some guidance for doing so on Ubuntu is available at:',
+  '- https://askubuntu.com/questions/1179273/how-to-remove-snap-completely-without-losing-the-chromium-browser/1206502#1206502',
+  '- https://www.omgubuntu.co.uk/2022/04/how-to-install-firefox-deb-apt-ubuntu-22-04',
+  '',
+  'Note that this may also require upgrading to at least Ubuntu 23.10, as it',
+  'will have more recent dependency updates that Chromium depends upon.',
+  ''
+]
+
+/**
+ * Configures browser tests to use Chromium on arm64 Linux
+ *
+ * Emits a warning and some suggestions if the system is arm64 Linux and
+ * /usr/bin/chromium is missing.
+ *
+ * Returns undefined if the system isn't arm64 Linux or if /usr/bin/chromium
+ * is missing.
+ * @returns {object | undefined} Chromium providerOptions or undefined
+ */
+function getProviderOptions(){
+  if (os.arch() !== 'arm64' || os.platform() !== 'linux') {
+    return
+  } else if (fs.existsSync('/usr/bin/chromium')) {
+    return {
+      capabilities: {
+        browserName: 'chromium',
+        'wdio:chromedriverOptions': {
+          binary: '/usr/bin/chromedriver'
+        },
+        'goog:chromeOptions': {
+          binary: '/usr/bin/chromium'
+        }
+      }
+    }
+  }
+  console.warn(ARM64_LINUX_WARNING.join('\n'))
+}
+
 export default defineConfig({
   // Remove process.env.VITEST hack once the following are resolved/merged:
   // - https://github.com/vitest-dev/vitest/issues/4686
@@ -43,7 +93,8 @@ export default defineConfig({
       exclude: [ ...configDefaults.coverage.exclude, 'plugins/*' ]
     },
     browser: {
-      name: 'chrome'
+      name: 'chrome',
+      providerOptions: getProviderOptions()
     }
   }
 })