1 files changed, 35 insertions, 0 deletions
diff --git a/spec/ruby/library/socket/tcpserver/new_spec.rb b/spec/ruby/library/socket/tcpserver/new_spec.rb
index d099f0175f..8d9696c9d8 100644
--- a/spec/ruby/library/socket/tcpserver/new_spec.rb
+++ b/spec/ruby/library/socket/tcpserver/new_spec.rb
@@ -48,6 +48,24 @@ describe "TCPServer.new" do
     addr[3].should == '0.0.0.0'
   end
 
+  it "binds to a port if the port is explicitly nil" do
+    @server = TCPServer.new('', nil)
+    addr = @server.addr
+    addr[0].should == 'AF_INET'
+    addr[1].should be_kind_of(Integer)
+    addr[2].should == '0.0.0.0'
+    addr[3].should == '0.0.0.0'
+  end
+
+  it "binds to a port if the port is an empty string" do
+    @server = TCPServer.new('', '')
+    addr = @server.addr
+    addr[0].should == 'AF_INET'
+    addr[1].should be_kind_of(Integer)
+    addr[2].should == '0.0.0.0'
+    addr[3].should == '0.0.0.0'
+  end
+
   it "coerces port to string, then determines port from that number or service name" do
     -> { TCPServer.new(SocketSpecs.hostname, Object.new) }.should raise_error(TypeError)
 
@@ -62,6 +80,23 @@ describe "TCPServer.new" do
     # pick such a service port that will be able to reliably bind...
   end
 
+  it "has a single argument form and treats it as a port number" do
+    @server = TCPServer.new(0)
+    addr = @server.addr
+    addr[1].should be_kind_of(Integer)
+  end
+
+  it "coerces port to a string when it is the only argument" do
+    -> { TCPServer.new(Object.new) }.should raise_error(TypeError)
+
+    port = Object.new
+    port.should_receive(:to_str).and_return("0")
+
+    @server = TCPServer.new(port)
+    addr = @server.addr
+    addr[1].should be_kind_of(Integer)
+  end
+
   it "raises Errno::EADDRNOTAVAIL when the address is unknown" do
     -> { TCPServer.new("1.2.3.4", 0) }.should raise_error(Errno::EADDRNOTAVAIL)
   end