node.js - supertest: test the redirection url -

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with supertest, can test redirection code 302

var request = require('supertest'); var app = require('../server').app;  describe('test route', function(){   it('return 302', function(done){     request(app)       .get('/fail_id')       .expect(302, done);   });   it('redirect /'); });

how can test url objetive redirect ? 

  it('redirect /', function(done){     request(app)       .get('/fail_id')       .expect('location', /\//, done);   });

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