No way to compare exceptions

[kyleconroy]

If the control path and the candidate both raise an exception, there isn't a way to compare them today. The comparison is currently hardcoded here. Would there be any interest in accepting a patch that added the equivalent* method to experiments?

science "widget-permissions" do |e|
  e.use { raise "Foo" }
  e.try { raise "Bar" }

  # Only called when both paths raise an exception
  e.equivalent do |control_exp, candidate_exp|
    # Ignore the message contents
    control_exp.class == candidate_exp
  end
end

• I'm not set on the name, please suggest anything better.

[jbarnette]

Kinda related to #67, in that the interfaces for ignoring and comparing changes are probably all at the wrong level right now.

[cdwort]

@jbarnette We're running into this exact issue. Would you consider a PR that would add support for a configurable error_compare in addition to compare?

[jbarnette]

@cdwort For sure!