diff --git a/lib/rb/spec/exception_spec.rb b/lib/rb/spec/exception_spec.rb
index e460a27..d16c7f8 100644
--- a/lib/rb/spec/exception_spec.rb
+++ b/lib/rb/spec/exception_spec.rb
@@ -1,23 +1,115 @@
 require File.dirname(__FILE__) + '/spec_helper'
 
-describe Thrift::Exception do
-  it "should have an accessible message" do
-    e = Thrift::Exception.new("test message")
-    e.message.should == "test message"
+module Thrift
+  describe Exception do
+    it "should have an accessible message" do
+      e = Exception.new("test message")
+      e.message.should == "test message"
+    end
   end
 end
 
-describe Thrift::ApplicationException do
-  it "should inherit from Thrift::Exception" do
-    Thrift::ApplicationException.superclass.should == Thrift::Exception
-  end
+module Thrift
+  describe ApplicationException do
+    it "should inherit from Thrift::Exception" do
+      ApplicationException.superclass.should == Exception
+    end
 
-  it "should have an accessible type and message" do
-    e = Thrift::ApplicationException.new
-    e.type.should == Thrift::ApplicationException::UNKNOWN
-    e.message.should be_nil
-    e = Thrift::ApplicationException.new(Thrift::ApplicationException::UNKNOWN_METHOD, "test message")
-    e.type.should == Thrift::ApplicationException::UNKNOWN_METHOD
-    e.message.should == "test message"
+    it "should have an accessible type and message" do
+      e = ApplicationException.new
+      e.type.should == ApplicationException::UNKNOWN
+      e.message.should be_nil
+      e = ApplicationException.new(ApplicationException::UNKNOWN_METHOD, "test message")
+      e.type.should == ApplicationException::UNKNOWN_METHOD
+      e.message.should == "test message"
+    end
+
+    it "should read a struct off of a protocol" do
+      prot = mock("MockProtocol")
+      prot.should_receive(:read_struct_begin).ordered
+      prot.should_receive(:read_field_begin).exactly(3).times.and_return(
+        ["message", Types::STRING, 1],
+        ["type", Types::I32, 2],
+        [nil, Types::STOP, 0]
+      )
+      prot.should_receive(:read_string).ordered.and_return "test message"
+      prot.should_receive(:read_i32).ordered.and_return ApplicationException::BAD_SEQUENCE_ID
+      prot.should_receive(:read_field_end).exactly(2).times
+      prot.should_receive(:read_struct_end).ordered
+
+      e = ApplicationException.new
+      e.read(prot)
+      e.message.should == "test message"
+      e.type.should == ApplicationException::BAD_SEQUENCE_ID
+    end
+
+    it "should skip bad fields when reading a struct" do
+      prot = mock("MockProtocol")
+      prot.should_receive(:read_struct_begin).ordered
+      prot.should_receive(:read_field_begin).exactly(5).times.and_return(
+        ["type", Types::I32, 2],
+        ["type", Types::STRING, 2],
+        ["message", Types::MAP, 1],
+        ["message", Types::STRING, 3],
+        [nil, Types::STOP, 0]
+      )
+      prot.should_receive(:read_i32).and_return ApplicationException::INVALID_MESSAGE_TYPE
+      prot.should_receive(:skip).with(Types::STRING).twice
+      prot.should_receive(:skip).with(Types::MAP)
+      prot.should_receive(:read_field_end).exactly(4).times
+      prot.should_receive(:read_struct_end).ordered
+
+      e = ApplicationException.new
+      e.read(prot)
+      e.message.should be_nil
+      e.type.should == ApplicationException::INVALID_MESSAGE_TYPE
+    end
+
+    it "should write a Thrift::ApplicationException struct to the oprot" do
+      prot = mock("MockProtocol")
+      prot.should_receive(:write_struct_begin).with("Thrift::ApplicationException").ordered
+      prot.should_receive(:write_field_begin).with("message", Types::STRING, 1).ordered
+      prot.should_receive(:write_string).with("test message").ordered
+      prot.should_receive(:write_field_begin).with("type", Types::I32, 2).ordered
+      prot.should_receive(:write_i32).with(ApplicationException::UNKNOWN_METHOD).ordered
+      prot.should_receive(:write_field_end).twice
+      prot.should_receive(:write_field_stop).ordered
+      prot.should_receive(:write_struct_end).ordered
+
+      e = ApplicationException.new(ApplicationException::UNKNOWN_METHOD, "test message")
+      e.write(prot)
+    end
+
+    it "should skip nil fields when writing to the oprot" do
+      prot = mock("MockProtocol")
+      prot.should_receive(:write_struct_begin).with("Thrift::ApplicationException").ordered
+      prot.should_receive(:write_field_begin).with("message", Types::STRING, 1).ordered
+      prot.should_receive(:write_string).with("test message").ordered
+      prot.should_receive(:write_field_end).ordered
+      prot.should_receive(:write_field_stop).ordered
+      prot.should_receive(:write_struct_end).ordered
+
+      e = ApplicationException.new(nil, "test message")
+      e.write(prot)
+
+      prot = mock("MockProtocol")
+      prot.should_receive(:write_struct_begin).with("Thrift::ApplicationException").ordered
+      prot.should_receive(:write_field_begin).with("type", Types::I32, 2).ordered
+      prot.should_receive(:write_i32).with(ApplicationException::BAD_SEQUENCE_ID).ordered
+      prot.should_receive(:write_field_end).ordered
+      prot.should_receive(:write_field_stop).ordered
+      prot.should_receive(:write_struct_end).ordered
+
+      e = ApplicationException.new(ApplicationException::BAD_SEQUENCE_ID)
+      e.write(prot)
+
+      prot = mock("MockProtocol")
+      prot.should_receive(:write_struct_begin).with("Thrift::ApplicationException").ordered
+      prot.should_receive(:write_field_stop).ordered
+      prot.should_receive(:write_struct_end).ordered
+
+      e = ApplicationException.new(nil)
+      e.write(prot)
+    end
   end
 end