Avoid errors in domain bounds check by checking before the transformation

[hersle]

I propose this as a fix for #36. Do you think there is a better way to handle this?

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.73%. Comparing base (35eb4f5) to head (eab9f36).
⚠️ Report is 21 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master      #37      +/-   ##
==========================================
+ Coverage   96.20%   96.73%   +0.52%     
==========================================
  Files           5        6       +1     
  Lines         237      306      +69     
==========================================
+ Hits          228      296      +68     
- Misses          9       10       +1     

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[stevengj]

Seems reasonable.