spec: Use 127.0.0.1 instead of localhost (fixes #172)

spec/nio/acceptables_spec.rb

@@ -20,13 +20,13 @@
     let(:port) { next_available_tcp_port }
 
     let :acceptable_subject do
-      server = TCPServer.new("localhost", port)
-      TCPSocket.open("localhost", port)
+      server = TCPServer.new("127.0.0.1", port)
+      TCPSocket.open("127.0.0.1", port)
       server
     end
 
     let :unacceptable_subject do
-      TCPServer.new("localhost", port + 1)
+      TCPServer.new("127.0.0.1", port + 1)
     end
 
     it_behaves_like "an NIO acceptable"

spec/nio/bytebuffer_spec.rb

@@ -281,7 +281,7 @@
   end
 
   context "I/O" do
-    let(:addr)   { "localhost" }
+    let(:addr)   { "127.0.0.1" }
     let(:port)   { next_available_tcp_port }
     let(:server) { TCPServer.new(addr, port) }
     let(:client) { TCPSocket.new(addr, port) }

spec/nio/monitor_spec.rb

@@ -4,7 +4,7 @@
 require "socket"
 
 RSpec.describe NIO::Monitor do
-  let(:addr) { "localhost" }
+  let(:addr) { "127.0.0.1" }
   let(:port) { next_available_tcp_port }
 
   let(:reader) { TCPServer.new(addr, port) }

spec/nio/selectables/ssl_socket_spec.rb

@@ -4,13 +4,13 @@
 require "openssl"
 
 RSpec.describe OpenSSL::SSL::SSLSocket do
-  let(:addr) { "localhost" }
+  let(:addr) { "127.0.0.1" }
   let(:port) { next_available_tcp_port }
 
   let(:ssl_key) { OpenSSL::PKey::RSA.new(1024) }
 
   let(:ssl_cert) do
-    name = OpenSSL::X509::Name.new([%w(CN localhost)])
+    name = OpenSSL::X509::Name.new([%w(CN 127.0.0.1)])
     OpenSSL::X509::Certificate.new.tap do |cert|
       cert.version = 2
       cert.serial = 1

spec/nio/selectables/udp_socket_spec.rb

@@ -7,23 +7,23 @@
 
   let :readable_subject do
     sock = UDPSocket.new
-    sock.bind("localhost", udp_port)
+    sock.bind("127.0.0.1", udp_port)
 
     peer = UDPSocket.new
-    peer.send("hi there", 0, "localhost", udp_port)
+    peer.send("hi there", 0, "127.0.0.1", udp_port)
 
     sock
   end
 
   let :unreadable_subject do
     sock = UDPSocket.new
-    sock.bind("localhost", udp_port + 1)
+    sock.bind("127.0.0.1", udp_port + 1)
     sock
   end
 
   let :writable_subject do
     peer = UDPSocket.new
-    peer.connect "localhost", udp_port
+    peer.connect "127.0.0.1", udp_port
     cntr = 0
     begin
       peer.send("X" * 1024, 0)

spec/spec_helper.rb

@@ -20,7 +20,7 @@ def next_available_tcp_port
     $current_tcp_port += 1
 
     begin
-      sock = Timeout.timeout(0.5) { TCPSocket.new("localhost", $current_tcp_port) }
+      sock = Timeout.timeout(0.5) { TCPSocket.new("127.0.0.1", $current_tcp_port) }
     rescue Errno::ECONNREFUSED, Timeout::Error
       break $current_tcp_port
     end