20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55 
     | 
    
      # File 'lib/test/unit/util/backtracefilter.rb', line 20
def filter_backtrace(backtrace, prefix=nil)
  return ["No backtrace"] unless backtrace
  return backtrace if ENV["TEST_UNIT_ALL_BACKTRACE"]
  if prefix
    split_prefixes = [prefix.split(TESTUNIT_FILE_SEPARATORS)]
  else
    split_prefixes = [TESTUNIT_PREFIX, POWERASSERT_PREFIX].compact
  end
  test_unit_internal_p = lambda do |entry|
    components = entry.split(TESTUNIT_FILE_SEPARATORS)
    split_prefixes.any? do |split_prefix|
      split_entry = components[0, split_prefix.size]
      next false unless split_entry[0..-2] == split_prefix[0..-2]
      split_entry[-1].sub(TESTUNIT_RB_FILE, '') == split_prefix[-1]
    end
  end
  in_user_code = false
  new_backtrace = backtrace.reverse.reject do |entry|
    if test_unit_internal_p.call(entry)
      in_user_code = true
      true
    else
      not in_user_code
    end
  end.reverse
  if new_backtrace.empty?
    new_backtrace = backtrace.reject do |entry|
      test_unit_internal_p.call(entry)
    end
    new_backtrace = backtrace if new_backtrace.empty?
  end
  new_backtrace
end
     |