Add backtick tests

Author: jorgezreik

tests/lib/rules/async-server-action.js

@@ -215,6 +215,48 @@ ruleTester.run('async-server-action', rule, {
         }
       `,
     },
+    {
+      code: `
+        async function addToCart(data) {
+          \`use server\`;
+        }
+      `,
+    },
+    {
+      code: `
+        function addToCart(data) {
+          \`use server\`;
+        }
+      `,
+    },
+    {
+      code: `
+        const addToCart = async (data) => {
+          \`use server\`;
+        }
+      `,
+    },
+    {
+      code: `
+        const addToCart = (data) => {
+          \`use server\`;
+        }
+      `,
+    },
+    {
+      code: `
+        const addToCart = async function (data) {
+          \`use server\`;
+        }
+      `,
+    },
+    {
+      code: `
+        const addToCart = function (data) {
+          \`use server\`;
+        }
+      `,
+    },
   ]),
 
   invalid: parsers.all([