Add dirty-chai to tests

Signed-off-by: João Victor Tozatti Risso <jvtr12@inf.ufpr.br>

src/test/test.js

 const chai = require('chai');
 
+const dirtyChai = require('dirty-chai');
+
+chai.use(dirtyChai);
+
 const chaiHttp = require('chai-http');
 
 const assert = chai.assert;