1 files changed, 45 insertions, 0 deletions
diff --git a/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb b/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb
new file mode 100644
index 0000000000..f2e7366eb1
--- /dev/null
+++ b/spec/ruby/library/socket/basicsocket/write_nonblock_spec.rb
@@ -0,0 +1,45 @@
+require_relative '../spec_helper'
+require_relative '../fixtures/classes'
+
+ruby_version_is "2.5" do
+  describe "BasicSocket#write_nonblock" do
+    SocketSpecs.each_ip_protocol do |family, ip_address|
+      before :each do
+        @r = Socket.new(family, :DGRAM)
+        @w = Socket.new(family, :DGRAM)
+
+        @r.bind(Socket.pack_sockaddr_in(0, ip_address))
+        @w.connect(@r.getsockname)
+      end
+
+      after :each do
+        @r.close unless @r.closed?
+        @w.close unless @w.closed?
+      end
+
+      it "sends data" do
+        @w.write_nonblock("aaa").should == 3
+        IO.select([@r], nil, nil, 2)
+        @r.recv_nonblock(5).should == "aaa"
+      end
+
+      platform_is :linux do
+        it 'does not set the IO in nonblock mode' do
+          require 'io/nonblock'
+          @w.nonblock?.should == false
+          @w.write_nonblock("aaa").should == 3
+          @w.nonblock?.should == false
+        end
+      end
+
+      platform_is_not :linux, :windows do
+        it 'sets the IO in nonblock mode' do
+          require 'io/nonblock'
+          @w.nonblock?.should == false
+          @w.write_nonblock("aaa").should == 3
+          @w.nonblock?.should == true
+        end
+      end
+    end
+  end
+end