From c984f437919161df99f26453fb45efbd5a9b4887 Mon Sep 17 00:00:00 2001
From: Emily <emily@mongodb.com>
Date: Thu, 28 Jan 2016 13:37:59 +0100
Subject: [PATCH] Add spec for java ext ByteBuf rewind! bug in previous commit

---
 spec/bson/byte_buffer_spec.rb | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/spec/bson/byte_buffer_spec.rb b/spec/bson/byte_buffer_spec.rb
index b23e5551e..f999d60e6 100644
--- a/spec/bson/byte_buffer_spec.rb
+++ b/spec/bson/byte_buffer_spec.rb
@@ -486,5 +486,28 @@
 
       it_behaves_like 'a rewindable buffer'
     end
+
+    context 'when the buffer is instantiated from a deserialization' do
+
+      let(:string) do
+        "#{BSON::Int32::BSON_TYPE}#{BSON::Int32::BSON_TYPE}"
+      end
+
+      let(:buffer) do
+        string.to_bson
+      end
+
+      before do
+        buffer.rewind!
+      end
+
+      it 'resets the read position to 0' do
+        expect(buffer.read_position).to eq(0)
+      end
+
+      it 'starts subsequent reads at position 0' do
+        expect(buffer.get_bytes(2)).to eq(string.to_bson.get_bytes(2))
+      end
+    end
   end
 end