Prevent accidentally committing focused test selectors

.eslintrc.js

@@ -9,6 +9,17 @@ const i18nDestructureRules = ["t", "tc", "te", "td", "d", "n"].map(
   })
 )
 
+const testFunctionNameSelector = "/(test|it|describe)/"
+const testOnlyRules = [
+  // Covers `test.only`, `test.concurrent.only` and variations
+  `CallExpression > MemberExpression:matches([object.name=${testFunctionNameSelector}], [object.object.name=${testFunctionNameSelector}])[property.name='only']`,
+  // Covers `test.only.each` and variations
+  `CallExpression > MemberExpression[object.object.name=${testFunctionNameSelector}][object.property.name='only']`,
+].map((selector) => ({
+  selector,
+  message: "Remove `.only` test selector before committing.",
+}))
+
 module.exports = {
   root: true,
   env: {
@@ -98,6 +109,7 @@ module.exports = {
     "no-restricted-syntax": [
       "error",
       ...i18nDestructureRules,
+      ...testOnlyRules,
       {
         selector:
           "ImportDeclaration[source.value='@vue/test-utils']:has(ImportSpecifier[local.name='shallowMount'])",