as_netresult completion token for tests

[anarthal]

Restructured handshake integration tests Removed er_connection infrastructure Reworked network_result Greatly simplified integration tests

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 98.24%. Comparing base (0060494) to head (7d56535).

Additional details and impacted files

[](https://app.codecov.io/gh/boostorg/mysql/pull/319?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) ```diff @@ Coverage Diff @@ ## develop #319 +/- ## =========================================== - Coverage 98.26% 98.24% -0.02% =========================================== Files 128 129 +1 Lines 5872 5864 -8 =========================================== - Hits 5770 5761 -9 - Misses 102 103 +1 ``` | [Files](https://app.codecov.io/gh/boostorg/mysql/pull/319?dropdown=coverage&src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) | Coverage Δ | | |---|---|---| | [include/boost/mysql/detail/connection\_impl.hpp](https://app.codecov.io/gh/boostorg/mysql/pull/319?src=pr&el=tree&filepath=include%2Fboost%2Fmysql%2Fdetail%2Fconnection_impl.hpp&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg#diff-aW5jbHVkZS9ib29zdC9teXNxbC9kZXRhaWwvY29ubmVjdGlvbl9pbXBsLmhwcA==) | `90.75% <ø> (-1.05%)` | :arrow_down: | ... and [7 files with indirect coverage changes](https://app.codecov.io/gh/boostorg/mysql/pull/319/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) ------ [Continue to review full report in Codecov by Sentry](https://app.codecov.io/gh/boostorg/mysql/pull/319?dropdown=coverage&src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://app.codecov.io/gh/boostorg/mysql/pull/319?dropdown=coverage&src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). Last update [0060494...7d56535](https://app.codecov.io/gh/boostorg/mysql/pull/319?dropdown=coverage&src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=boostorg).