Issue #10857 has been reported by Shayne Clausson.
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Bug #10857: Resolv::DNS::Resource ==() method incorrectly returns false due to TTL attrib
https://bugs.ruby-lang.org/issues/10857
* Author: Shayne Clausson
* Status: Open
* Priority: Normal
* Assignee:
* ruby -v: ruby 1.9.3p545 (2014-02-24) [i386-mingw32]
* Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN, 2.2: UNKNOWN
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require 'resolv'
resolver = Resolv::DNS.new(:nameserver => ['8.8.8.8'],
:search => [],
:ndots => 1)
hosts = resolver.getresources('
ruby.org', Resolv::DNS::Resource::IN::A)
returned_record = hosts.first
a = Resolv::DNS::Resource::IN::A
#create an identical record
new_record = a.new(returned_record.address)
new_record == returned_record
=>false #but should return true
#If I change this
class Resolv::DNS::Resource
def ==(other) # :nodoc:
return false unless self.class == other.class
s_ivars = self.instance_variables
s_ivars.sort!
**s_ivars.delete "@ttl"**
o_ivars = other.instance_variables
o_ivars.sort!
**o_ivars.delete "@ttl"**
return s_ivars == o_ivars &&
s_ivars.collect {|name| self.instance_variable_get name} ==
o_ivars.collect {|name| other.instance_variable_get name}
end
end
#To this
class Resolv::DNS::Resource
def ==(other) # :nodoc:
return false unless self.class == other.class
s_ivars = self.instance_variables
s_ivars.sort!
**s_ivars.delete(:@ttl)**
o_ivars = other.instance_variables
o_ivars.sort!
**o_ivars.delete(:@ttl)**
return s_ivars == o_ivars &&
s_ivars.collect {|name| self.instance_variable_get name} ==
o_ivars.collect {|name| other.instance_variable_get name}
end
end
new_record == returned_record
=>true
--
https://bugs.ruby-lang.org/