rb: Implement Thrift::UNIXSocket and Thrift::UNIXServerSocket

In benchmarking it turns out these don't give any noticeable performance boost,
but as I've already written them, somebody may want them for something.


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@669019 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/lib/rb/spec/socket_spec_shared.rb b/lib/rb/spec/socket_spec_shared.rb
new file mode 100644
index 0000000..448a516
--- /dev/null
+++ b/lib/rb/spec/socket_spec_shared.rb
@@ -0,0 +1,52 @@
+require File.dirname(__FILE__) + '/spec_helper'
+
+shared_examples_for "a socket" do
+  it "should open a socket" do
+    @socket.open.should == @handle
+  end
+
+  it "should be open whenever it has a handle" do
+    @socket.should_not be_open
+    @socket.open
+    @socket.should be_open
+    @socket.handle = nil
+    @socket.should_not be_open
+    @socket.handle = @handle
+    @socket.close
+    @socket.should_not be_open
+  end
+
+  it "should write data to the handle" do
+    @socket.open
+    @handle.should_receive(:write).with("foobar")
+    @socket.write("foobar")
+    @handle.should_receive(:write).with("fail").and_raise(StandardError)
+    lambda { @socket.write("fail") }.should raise_error(Thrift::TransportException) { |e| e.type.should == Thrift::TransportException::NOT_OPEN }
+  end
+
+  it "should raise an error when it cannot read from the handle" do
+    @socket.open
+    @handle.should_receive(:read).with(17).and_raise(StandardError)
+    lambda { @socket.read(17) }.should raise_error(Thrift::TransportException) { |e| e.type.should == Thrift::TransportException::NOT_OPEN }
+  end
+
+  it "should raise an error when it reads no data from the handle" do
+    @socket.open
+    @handle.should_receive(:read).with(17).and_return("")
+    lambda { @socket.read(17) }.should raise_error(Thrift::TransportException, "Socket: Could not read 17 bytes from #{@socket.instance_variable_get("@desc")}")
+  end
+
+  it "should return the data read when reading from the handle works" do
+    @socket.open
+    @handle.should_receive(:read).with(17).and_return("test data")
+    @socket.read(17).should == "test data"
+  end
+
+  it "should declare itself as closed when it has an error" do
+    @socket.open
+    @handle.should_receive(:write).with("fail").and_raise(StandardError)
+    @socket.should be_open
+    lambda { @socket.write("fail") }.should raise_error
+    @socket.should_not be_open
+  end
+end