Test refactoring

[stv0g]

This is also a shot at fixing #532

[codecov[bot]]

Codecov Report

Patch coverage has no change and project coverage change: -0.17 :warning:

Comparison is base (c863a3a) 78.47% compared to head (f2223af) 78.31%.

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #570      +/-   ##
==========================================
- Coverage   78.47%   78.31%   -0.17%     
==========================================
  Files          41       41              
  Lines        4275     4275              
==========================================
- Hits         3355     3348       -7     
- Misses        712      718       +6     
- Partials      208      209       +1     

Flag	Coverage Δ
go	78.31% <ø> (-0.17%)	:arrow_down:
wasm	22.92% <ø> (ø)

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see 4 files with indirect coverage changes

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[Sean-Der]

cherry picked assert -> require 05ab6847411265463a1852a0de4d597f1d9d99bc

[Sean-Der]

Cherry picked CheckRoutines simplification in 01c35354b07b10903f3dfac64c883356958241a7

[Sean-Der]

Cherry picked test.TimeOut change with 85a3a7f52407586fea6957187c461aaa08241611

[Sean-Der]

Cherry-picked t.Fatal -> require.NoError with 52f2075c2e91a4912adcf4a7a13cdf019fbd5bd6