python - How to unit test this lambda code? -


say, have following python code:

try:     fabulous.color import fg256     format_info = lambda x: fg256(63, unicode(x, 'utf-8')).as_utf8 except importerror:     format_info = lambda x: '\033[1;30m' + x + '\033[0m'

how can unit test this?

is worth testing?

there need mock import statement both branches excised. trivial -- example, mock fg256 have side effect of raise importerror.

matching returned string has right control characters fine feels brittle.

what want test? seem have 2 unrelated cases here;

  • importing fails
  • lambda returns correct info

it's not responsibility check not using code fails; if want test nevertheless (perhaps because code has posted on popular forum) separate 2 distinct tests.

we don't know lambda supposed return, looks of it, should return string similar assign in except branch?


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