Test.filter_backtrace method doesn't exist

[nevans]

In #assert_nothing_raised, Test.filter_backtrace is called in one of the rescue clauses:

test-unit-ruby-core/lib/core_assertions.rb

Lines 185 to 191 in c6d86d4

	rescue *(args.empty? ? Exception : args) => e
	msg = message(msg) {
	"Exception raised:\n<#{mu_pp(e)}>\n""Backtrace:\n" <<
	Test.filter_backtrace(e.backtrace).map{|frame| " #{frame}"}.join("\n")
	}
	raise Test::Unit::AssertionFailedError, msg.call, e.backtrace
	end

But that method isn't part of test/unit. It looks to me like that method is defined here:

https://github.com/ruby/ruby/blob/7d26c03267cf1be643963355fc52efde1574b37a/tool/lib/test/unit.rb#L27-L61

  class << self
    ##
    # Filter object for backtraces.

    attr_accessor :backtrace_filter
  end

  class BacktraceFilter # :nodoc:
    def filter bt
      return ["No backtrace"] unless bt

      new_bt = []
      pattern = %r[/(?:lib\/test/|core_assertions\.rb:)]

      unless $DEBUG then
        bt.each do |line|
          break if pattern.match?(line)
          new_bt << line
        end

        new_bt = bt.reject { |line| pattern.match?(line) } if new_bt.empty?
        new_bt = bt.dup if new_bt.empty?
      else
        new_bt = bt.dup
      end

      new_bt
    end
  end

  self.backtrace_filter = BacktraceFilter.new

  def self.filter_backtrace bt # :nodoc:
    backtrace_filter.filter bt
  end

I assume that will work when running tests in the ruby repo, but it doesn't seem to work from individual gem repos. I temporarily copied the above into my local test/lib/helper.rb and it fixed the issue. Should it simply be moved into core_assertions? Or should more of tool/lib/test/unit.rb be migrated into a different file in this repo?

Thanks!

[hsbt]

Thank you to catch this. I'm considering to copy BacktraceFilter to this repo from ruby/ruby.

[hsbt]

@nevans Can you try with v1.0.2? It supports Test.filter_backtrace with c669064.

[nevans]

@hsbt I verified it with an explicit raise inside an assert_nothing_raised block:

With core-assertions v1.0.1: NoMethodError: undefined method `filter_backtrace' for Test:Module

╭╼ <nick@anarres> ~/src/net-imap git:[tls-verified {4} U:2]
╰──╼ $) bundle exec rake TEST="test/net/imap/test_imap.rb" TESTOPTS='--name=/test_imaps_verify_none/'
Loaded suite /home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/rake-13.0.6/lib
/rake/rake_test_loader
Started
E
========================================================================================================================
Error: test_imaps_verify_none(IMAPTest): NoMethodError: undefined method `filter_backtrace' for Test:Module
/home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/bundler/gems/test-unit-ruby-core-
cbb4532eae10/lib/core_assertions.rb:188:in `block in assert_nothing_raised'
/home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/bundler/gems/test-unit-ruby-core-
cbb4532eae10/lib/core_assertions.rb:26:in `block in message'
/home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/bundler/gems/test-unit-ruby-core-
cbb4532eae10/lib/core_assertions.rb:190:in `rescue in assert_nothing_raised'
/home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/bundler/gems/test-unit-ruby-core-
cbb4532eae10/lib/core_assertions.rb:181:in `assert_nothing_raised'
/home/nick/src/net-imap/test/net/imap/test_imap.rb:66:in `test_imaps_verify_none'
     63:       # Assert verified *after* the imaps_test and assert_nothing_raised blocks.
     64:       # Otherwise, failures can't logout and need to wait for the timeout.
     65:       verified, imap = :unknown, nil
  => 66:       assert_nothing_raised do
     67:         imaps_test do |port|
     68:           imap = Net::IMAP.new(
     69:             server_addr,
========================================================================================================================
Finished in 0.20029998 seconds.
------------------------------------------------------------------------------------------------------------------------
1 tests, 0 assertions, 0 failures, 1 errors, 0 pendings, 0 omissions, 0 notifications
0% passed
------------------------------------------------------------------------------------------------------------------------
4.99 tests/s, 0.00 assertions/s
rake aborted!
Command failed with status (1)
/home/nick/.local/share/rbenv/versions/3.2.2/bin/bundle:25:in `load'
/home/nick/.local/share/rbenv/versions/3.2.2/bin/bundle:25:in `<main>'
Tasks: TOP => default => test
(See full trace by running task with --trace)

With core-assertions v1.0.2: Exception raised: <#<RuntimeError: oops>>

╭╼ <nick@anarres> ~/src/net-imap git:[tls-verified {4} U:2]
╰──╼ $) bundle exec rake TEST="test/net/imap/test_imap.rb" TESTOPTS='--name=/test_imaps_verify_none/'
Loaded suite /home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/gems/rake-13.0.6/lib
/rake/rake_test_loader
Started
F
========================================================================================================================
Failure: test_imaps_verify_none(IMAPTest):
  Exception raised:
  <#<RuntimeError: oops>>
  Backtrace:
    /home/nick/src/net-imap/test/net/imap/test_imap.rb:76:in `block in test_imaps_verify_none'.
/home/nick/src/net-imap/test/net/imap/test_imap.rb:76:in `block in test_imaps_verify_none'
     73:           verified = imap.tls_verified?
     74:           imap
     75:         end
  => 76:         raise "oops"
     77:       end
     78:       assert_equal false, verified
     79:       assert_equal false, imap.tls_verified?
/home/nick/.local/share/rbenv/versions/3.2.2/lib/ruby/gems/3.2.0/bundler/gems/test-unit-ruby-core-
c6f0dda672b3/lib/core_assertions.rb:219:in `assert_nothing_raised'
/home/nick/src/net-imap/test/net/imap/test_imap.rb:66:in `test_imaps_verify_none'
========================================================================================================================
Finished in 0.199629887 seconds.
------------------------------------------------------------------------------------------------------------------------
1 tests, 0 assertions, 1 failures, 0 errors, 0 pendings, 0 omissions, 0 notifications
0% passed
------------------------------------------------------------------------------------------------------------------------
5.01 tests/s, 0.00 assertions/s
rake aborted!
Command failed with status (1)
/home/nick/.local/share/rbenv/versions/3.2.2/bin/bundle:25:in `load'
/home/nick/.local/share/rbenv/versions/3.2.2/bin/bundle:25:in `<main>'
Tasks: TOP => default => test
(See full trace by running task with --trace)

Thanks!