Add tests for NMT base and NMT master

[codecov-commenter]

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Codecov Report

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

Project coverage is 68.74%. Comparing base (c4560da) to head (6fa2986).

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Additional details and impacted files

[](https://app.codecov.io/gh/christiansandberg/canopen/pull/504?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Christian+Sandberg) ```diff @@ Coverage Diff @@ ## master #504 +/- ## ========================================== + Coverage 67.90% 68.74% +0.83% ========================================== Files 26 26 Lines 3116 3116 Branches 527 527 ========================================== + Hits 2116 2142 +26 + Misses 858 837 -21 + Partials 142 137 -5 ``` [see 2 files with indirect coverage changes](https://app.codecov.io/gh/christiansandberg/canopen/pull/504/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Christian+Sandberg)

[erlend-aasland]

More yak shave for #500.

[erlend-aasland]

FTR, I will follow up with a PR for hardening the NMT slave tests.