chore: add test case for indentation

src/reverse_translator.test.ts

@@ -0,0 +1,12 @@
+import { JsonTemplateEngine } from './engine';
+
+describe('reverse_translator', () => {
+  it('should reverse translate with indentation', () => {
+    const template = JsonTemplateEngine.reverseTranslate(
+      JsonTemplateEngine.parse(`{a: {b: {c: 1}}}`),
+    );
+    expect(template).toEqual(
+      '{\n    "a": {\n        "b": {\n            "c": 1\n        }\n    }\n}',
+    );
+  });
+});