javascript - What is the purpose of skin-deep? -

let me start saying new react , newer tdd coding in javascript. working on react / redux application testing of our components. our current test suite consists of jasmine, mocha, chai, karma, , skin-deep. of our components using skin-deep (see below -- skin deep )

  import sd 'skin-deep';    describe('testing-text-editor', () => {    let tree;   let instance;   let vdom;   let field;   let fieldinput;   let callbackfunction;    beforeeach(() => {     field = 'description';     fieldinput = '<div>i description</div>';     callbackfunction = () => console.log('foo');     tree = sd.shallowrender(react.createelement(texteditor, { id: field, initialvalue: fieldinput, onsubmit: callbackfunction }));     instance = tree.getmountedinstance();     vdom = tree.getrenderoutput();   });    it('testing-render-description', function() {     // tests   }); }) 

whenever use skin-deep using on components use shallowrender. wondering if has understanding of skin-deep doing? i've been searching morning description of functionality , purpose yet find satisfying answer.

edit: moved logic beforeeach more descriptive problem

thanks!