text: import React from 'react';
  import { innerText, getDOMNode } from '@test/testUtils';
  import Header from '../Header';
  
  describe('Header', () => {
    it('Should render a Header', () => {
      const title = 'Test';
      const instance = getDOMNode(<Header>{title}</Header>);
      assert.include(instance.className, 'rs-header');
      assert.equal(innerText(instance), title);
    });
  
    it('Should have a custom className', () => {
      const instance = getDOMNode(<Header className="custom" />);
      assert.include(instance.className, 'custom');
    });
  
    it('Should have a custom style', () => {
      const fontSize = '12px';
      const instance = getDOMNode(<Header style={{ fontSize }} />);
      assert.equal(instance.style.fontSize, fontSize);
    });
  
    it('Should have a custom className prefix', () => {
      const instance = getDOMNode(<Header classPrefix="custom-prefix" />);
      assert.ok(instance.className.match(/\bcustom-prefix\b/));
    });
  });
  