How to show longer traces in Rails TestCases

See whether you haven't a file config/initializers/backtrace_silencers.rb

It says:

# You can also remove all the silencers if you're trying to debug# a problem that might stem from framework code.Rails.backtrace_cleaner.remove_silencers!

You can also call remove_filters! if the first was not enough, but filters only make the paths shorter, while silencers do remove some lines from the backtrace.

You may find the source code in railties/lib/rails/backtrace_cleaner.rb and activesupport/lib/active_support/backtrace_cleaner.rb useful.

You can customize Minitest stack traces like this for example:

class MyBacktraceFilter  def filter bt    bt.dup.reject{|x| not x.to_s =~ /#{::Rails.root.to_s}/}  endendMiniTest.backtrace_filter = MyBacktraceFilter.new

The filter method accepts the full stack trace in the bt parameter as an array and returns the filtered array. If you want the entire stack to show simply pass the input:

class MyBacktraceFilter  def filter bt    bt  endendMiniTest.backtrace_filter = MyBacktraceFilter.new

You could try setting global variable $DEBUG to non-nil value. If that's minitest who filters your backtrace, setting $DEBUG = true would ensure that the entire backtrace is printed out.