Why I see LoadError: cannot load such file -- spec_helper?
When your tests fails with:
LoadError: cannot load such file -- spec_helper
then problem might be related to the fact you specified complex KNAPSACK_PRO_TEST_FILE_PATTERN
and knapsack_pro
gem cannot detect correct main test directory with spec_helper
. You should set KNAPSACK_PRO_TEST_DIR=spec
. Please read also example.