text: const postcss = require('postcss');
  const css = `
      .test {
          border-radius: 12px / 6px;
      }
  `;
  const expectCss = `
      .test {
          border-radius: 12px / 6px;
      }
  `
  describe('automath', () => {
      test('border-radius', async () => {
          const res = await postcss([
              require('../postcss-automath')
          ]).process(css, {
              from: undefined
          });
          expect(res.css).toBe(expectCss);
      });
  });