Version

Most was based on this version.

ng version
------------------
Angular CLI: 8.3.25
Node: 10.14.0
OS: win32 x64
Angular: 8.2.14

UT

HTTP

join multiple http query

forkJoin(httpTest1(), httpTest2()).subscribe(
  results => {
    // results[0] : return of test1()
    // results[1] : return of test2()
    console.log("Results: ", results)
  },
  err => {
    console.error("Error:", err);
  }
);