bulding online compilers — 4

iam looking who are going to develop online compilers with testcases evaluation like see below examples
1.https://www.jdoodle.com/guru(in this link see how onliner compilers working and also we are going to evaluate when some one submit their code,internally we write test cases for that ,after submitting the code automatic evaluation will happen without human effort to evaluate that code)
2.hackerrank.com
3.hackerearth.com