Add more test

tests/helpers.ts

@@ -25,6 +25,24 @@ export const unicodeSingle = [
   "",
 ].join("\n");
 
+export const withService = [
+  "import { service } from '@ember/service';",
+  "import Component from '@glimmer/component';",
+  "",
+  "export class ExampleComponent extends Component {",
+  "  @service('store') store;",
+  "  property = true;",
+  "",
+  "  ask() {",
+  "    return 'hello world'",
+  "  }",
+  "",
+  "  <template>",
+  "    <h2>My Component</h2>",
+  "  </template>",
+  "}",
+].join("\n");
+
 export const unicodeMulti = [
   "export const Run = <template>",
   "  r̸̳͙̟̳̺̩̎̍̎̚͠ǘ̷̟̀͂̽̿̅̆̈́n̷̜̣̙̫̦̳͇̞̣̻͑̊̂́̿̈́̕͜͜͠ͅ",

tests/transformer.toStringWithTemplatePlaceholders.test.ts

@@ -3,6 +3,7 @@ import { describe, it, expect } from "vitest";
 import { Transformer } from "content-tag-utils";
 
 import {
+  withService,
   implicitDefault,
   inAClass,
   multiTemplate,
@@ -111,6 +112,31 @@ it("multiWithClass", () => {
   expect(multiWithClass.length).toEqual(result.length);
 });
 
+it("withService", () => {
+  let t = new Transformer(withService);
+
+  let result = t.toString({ placeholders: true });
+
+  expect(result).toMatchInlineSnapshot(`
+    "import { service } from '@ember/service';
+    import Component from '@glimmer/component';
+
+    export class ExampleComponent extends Component {
+      @service('store') store;
+      property = true;
+
+      ask() {
+        return 'hello world'
+      }
+
+      [_TEMPLATE_(\`
+        <h2>My Component</h2>
+      \`)] = 0;
+    }"
+  `);
+  expect(withService.length).toEqual(result.length);
+});
+
 describe("with transforms", () => {
   it("noop", () => {
     let t = new Transformer(simpleTest);