Simplecov collate not work as expect

[kewudu]

I have my own test framework in my project, when I use simplecov to get coverage in the same machine, I can not merge the coverage result, the merged result is empty!

Operation step: (1) run test1 with simplecov, get the following .resultset.json

{
  "pid_34884": {
    "coverage": {
      "C:/aaa/aa/aa.rb": {
        "lines": [
          1,
******
    "timestamp": 1615973314
  }

(2) run test2 with simplecov, get the following .resultset.json

{
  "pid_35136": {
    "coverage": {
      "C:/bb/bb/b.rb": {
        "lines": [
          1,
          1,
********** 
    "timestamp": 1615973421
  }
}

(3) then I put the these two result in two directory: --coverage1     |-- asserts     |-- .last_run.json     |-- .resultset.json     |-- .resultset.json.locl     |-- index.html --coverage2     |-- asserts     |--.last_run.json     |-- .resultset.json     |-- .resultset.json.locl     |-- index.html

(4) in ruby run SimpleCov.collate Dir["coverage*/.resultset.json"], it print: Coverage report generated for pid_34884, pid_35136 to D:/merge/coverage. 0 / 0 LOC (100.0%) covered.

a new coverage directoy created, but the .resultset.json is empty like below:

{
  "pid_34884, pid_35136": {
    "coverage": {
    },
    "timestamp": 1616051300
  }
}

ruby version: ruby 2.6.3p62 (2019-04-16 revision 67580) [x64-mingw32] simplecov: simplecov (0.21.2) simplecov-html (0.12.3, 0.10.2) simplecov_json_formatter (0.1.2)

So, is anything wrong in my operation? or I am misunderstand the SimpleCov.collate usage?

[jviney]

Make sure the code is available in the same location as when the individual coverage reports were generated.

It would be nice if simplecov warned you about this.

[danie1Lin]

I encounter this problem too. The path you run SimpleCov.collate must equal to paths in .result.json of other coverages.

[ddieulivol]

Make sure the code is available in the same location as when the individual coverage reports were generated.

@jviney Is this really the only solution? Isn't there a way to just merge the .resultset.json files without having to have the entire codebase available?