Move spec/rubyspec to spec/ruby for consistency

* Other ruby implementations use the spec/ruby directory.
  [Misc #13792] [ruby-core:82287]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@59979 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

spec/ruby/library/socket/shared/recv_nonblock.rb

@@ -0,0 +1,54 @@
+describe :socket_recv_nonblock, shared: true do
+  before :each do
+    @s1 = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, 0)
+    @s2 = Socket.new(Socket::AF_INET, Socket::SOCK_DGRAM, 0)
+  end
+
+  after :each do
+    @s1.close unless @s1.closed?
+    @s2.close unless @s2.closed?
+  end
+
+  it "raises an exception extending IO::WaitReadable if there's no data available" do
+    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
+    lambda {
+      @s1.recv_nonblock(5)
+    }.should raise_error(IO::WaitReadable) { |e|
+      platform_is_not :windows do
+        e.should be_kind_of(Errno::EAGAIN)
+      end
+      platform_is :windows do
+        e.should be_kind_of(Errno::EWOULDBLOCK)
+      end
+    }
+  end
+
+  it "receives data after it's ready" do
+    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
+    @s2.send("aaa", 0, @s1.getsockname)
+    IO.select([@s1], nil, nil, 2)
+    @s1.recv_nonblock(5).should == "aaa"
+  end
+
+  ruby_version_is "2.3" do
+    it "allows an output buffer as third argument" do
+      @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
+      @s2.send("data", 0, @s1.getsockname)
+      IO.select([@s1], nil, nil, 2)
+
+      buf = "foo"
+      @s1.recv_nonblock(5, 0, buf)
+      buf.should == "data"
+    end
+  end
+
+  it "does not block if there's no data available" do
+    @s1.bind(Socket.pack_sockaddr_in(0, "127.0.0.1"))
+    @s2.send("a", 0, @s1.getsockname)
+    IO.select([@s1], nil, nil, 2)
+    @s1.recv_nonblock(1).should == "a"
+    lambda {
+      @s1.recv_nonblock(5)
+    }.should raise_error(IO::WaitReadable)
+  end
+end