def filter_backtrace(backtrace, prefix=nil)
return ["No backtrace"] unless backtrace
return backtrace if ENV["TEST_UNIT_ALL_BACKTRACE"]
if prefix
split_prefix = prefix.split(TESTUNIT_FILE_SEPARATORS)
else
split_prefix = TESTUNIT_PREFIX
end
test_unit_internal_p = lambda do |entry|
components = entry.split(TESTUNIT_FILE_SEPARATORS)
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
jruby_internal_p = lambda do |entry|
(/\Aorg\/jruby\// =~ entry) ? true : false
end
found_prefix = false
new_backtrace = backtrace.reverse.reject do |entry|
if test_unit_internal_p.call(entry)
found_prefix = true
true
elsif found_prefix
jruby_internal_p.call(entry)
else
true
end
end.reverse
if new_backtrace.empty?
new_backtrace = backtrace.reject do |entry|
test_unit_internal_p.call(entry) or jruby_internal_p.call(entry)
end
new_backtrace = backtrace if new_backtrace.empty?
end
new_backtrace
end