allow comparing stdout/stderr to the contents in a file about shellspec HOT 2 CLOSED

# Fixtures location ./spec/fixtures
FIXTURES="$SHELLSPEC_HELPERDIR/fixtures"

# create file for this example
[ -d "$FIXTURES" ] || mkdir "$FIXTURES"
[ -f "$FIXTURES/error_message" ] || \
  printf "error detail:\nexample a\nexample b" > "$FIXTURES/error_message"

# compare value to file content
fixture(){
  test "${fixture:?}" == "$( cat "$FIXTURES/$1" )"
}

Describe 'compare fixture'
    example_error(){
      printf "error detail:\nexample a\nexample b" >&2
    }

    Example 'check error message that validate fixture'
        When call example_error
        The error should satisfy fixture 'error_message'
    End
End