* test/socket/test_tcp.rb (test_initialize_failure): Use EADDRNOTAVAIL

  to test an error message generated by bind() failure.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42057 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 29 insertions, 14 deletions

diff --git a/test/socket/test_tcp.rb b/test/socket/test_tcp.rb
index aeceef6315..73747929e3 100644
--- a/test/socket/test_tcp.rb
+++ b/test/socket/test_tcp.rb
@@ -7,26 +7,41 @@ end
 
 class TestSocket_TCPSocket < Test::Unit::TestCase
   def test_initialize_failure
-    addr = '127.0.0.1'
-
-    s = TCPServer.new(addr, nil)
-    server_port = s.addr[1]
+    # These addresses are chosen from TEST-NET-1, TEST-NET-2, and TEST-NET-3.
+    # [RFC 5737]
+    # They are choosen because probably they are not used as a host address.
+    # Anyway the addresses are used for bind() and should be failed.
+    # So no packets should be generated.
+    test_ip_addresses = [
+      '192.0.2.1', '192.0.2.42', # TEST-NET-1
+      '198.51.100.1', '198.51.100.42', # TEST-NET-2
+      '203.0.113.1', '203.0.113.42', # TEST-NET-3
+    ]
+    begin
+      list = Socket.ip_address_list
+    rescue NotImplementedError
+      return
+    end
+    test_ip_addresses -= list.reject {|ai| !ai.ipv4? }.map {|ai| ai.ip_address }
+    if test_ip_addresses.empty?
+      return
+    end
+    client_addr = test_ip_addresses.first
+    client_port = 8000
 
-    c = TCPSocket.new(addr, server_port)
-    client_port = c.addr[1]
+    server_addr = '127.0.0.1'
+    server_port = 80
 
     begin
-      # TCPServer.new uses SO_REUSEADDR so we must create a failure on the
-      # local address.
-      TCPSocket.new(addr, server_port, addr, client_port)
+      # Since client_addr is not an IP address of this host,
+      # bind() in TCPSocket.new should fail as EADDRNOTAVAIL.
+      t = TCPSocket.new(server_addr, server_port, client_addr, client_port)
       flunk "expected SystemCallError"
     rescue SystemCallError => e
-      if /mswin|mingw/ =~ RUBY_PLATFORM
-        assert_match "for \"#{addr}\" port #{server_port}", e.message
-      else
-        assert_match "for \"#{addr}\" port #{client_port}", e.message
-      end
+      assert_match "for \"#{client_addr}\" port #{client_port}", e.message
     end
+  ensure
+    t.close if t && !t.closed?
   end
 
   def test_recvfrom