@amho/ash-template-engine/test/mustache.spec.ts

I built my own template engine for learning purposes with zero dependencies in TypeScript - It's called Ash

import 'mocha';
import { expect } from 'chai';
import { TemplateEngine } from '../src';
import { dataNested, dataSimple } from '../examples/shared';

describe('Mustache Syntax', () => {
  it('should compile simple objects', () => {
    const compiler = TemplateEngine.createWithMustacheSyntax().compile;

    expect(
      compiler('This car is a {{ manufacturer }} {{ model }}.', dataSimple),
    ).to.equal('This car is a Mercedes-Benz E63 AMG.');
  });

  it('should compile nested objects', () => {
    const compiler = TemplateEngine.createWithMustacheSyntax().compile;

    expect(
      compiler(
        'This {{ dataNested.category }} has {{ dataNested.specs.engine.type }} with {{ dataNested.specs.engine.hp }} horsepower, and {{ dataNested.specs.doors }} doors.',
        { dataNested },
      ),
    ).to.equal('This car has V8 with 400 horsepower, and 2 doors.');
  });
});