使用超测运行Mocha测试时，Express路由永远不会执行

当运行应用程序并直接使用Postman命中它时，这是一个有效的路由:

router.get("/profile", function(req, res) {
  var schema = schemas.filter(function(e) { return e.route === "profile"; }).pop();
  if (schema !== undefined) {
    var schemaJson = require(schema.schemaFile);
    return res.status(200).send(schemaJson);
  }
});

这里有一个测试:

var schemas = require("../../conf/schemas"),
  api_key = require("../../conf/api-keys").pop().key,
  app = require("../../app"),
  request = require("supertest");
    describe("CDM API Get Schema Operations", function() {
      it("Returns 404 for schema that do not exist", function (done) {
        request(app)
          .get("/schemas/profile")
          .end(function(err, res) {
            expect(res.statusCode).to.equal(500);
            //expect(res.body.thing).to.not.equal(null);
            done()
          });
      });
    });

在调试模式下运行，到达expect语句，总是带有一个错误。永远无法到达路由中的代码。

我的app.js文件导出app对象(它是一个Express对象)。

var express = require('express'),
  logger = require('morgan'),
  body_parser = require('body-parser');
var cdm_gateway = require('./middleware/cdm-gateway'),
  v1_gateway = require('./middleware/v1-gateway'),
  schema_routes = require('./routes/schema'),
  member_routes = require('./routes/member');
var app = express();
app.use(cdm_gateway);
app.use("/v1", v1_gateway);
app.use(logger('dev'));
app.use(body_parser.json());
app.use(body_parser.urlencoded({ extended: false }));
app.use('/v1/schemas', schema_routes);
app.use('/v1/member', member_routes);
// Error handling
app.use(function(req, res, next) {
  var err = new Error('Not Found');
  err.status = 404;
  next(err);
});
if (app.get('env') === 'development') {
  app.use(function(err, req, res, next) {
    res.status(err.status || 500)
      .send('error', {
      message: err.message,
      error: err
    });
  });
}
app.use(function(err, req, res, next) {
  res.status(err.status || 500)
    .send('error', {
    message: err.message,
    error: {}
  });
});
app.server = app.listen(3030);
module.exports = app;

错误通常包含不支持的状态码方法。