harden e2e test by adding healthCheck

[tisonkun]

Signed-off-by: tison wander4096@gmail.com

... according to #9 (comment).

This is a draft PR and I submit it for running tests. I'll set it as ready for review after validation.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.15%. Comparing base (f4743a9) to head (a647136).
⚠️ Report is 62 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master      #10   +/-   ##
=======================================
  Coverage   85.15%   85.15%           
=======================================
  Files           9        9           
  Lines         283      283           
=======================================
  Hits          241      241           
  Misses         42       42           

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[tisonkun]

@Shikugawa @wu-sheng I think the tests is somehow stable and you can review that whether the change is valid.

[Shikugawa]

Overall LGTM. A nit comment.

[Shikugawa]

This PR is very helpful and worth doing to implement other agent implementations using the same mechanism on regression tests, such as cpp2sky.

[tisonkun]

@Shikugawa @wu-sheng this PR is ready for review.

[Shikugawa]

Thanks!

[tisonkun]

@Shikugawa thanks for your review! You may clean up the squash commit message the next time. I think most of them are meaningless. Or you can ask me to do the squash :P