Remove duplicate Transactable tests from Repository

Author: Tom Johnson

lib/rdf/spec/repository.rb

@@ -48,35 +48,6 @@
     end
   end
 
-  describe "#transaction" do
-    it 'gives an immutable transaction' do
-      expect { subject.transaction { insert([]) } }.to raise_error TypeError
-    end
-
-    it 'commits a successful transaction' do
-      statement = RDF::Statement(:s, RDF.type, :o)
-      expect(subject).to receive(:commit_transaction).and_call_original
-      
-      expect do
-        subject.transaction(mutable: true) { insert(statement) }
-      end.to change { subject.statements }.to include(statement)
-    end
-
-    it 'rolls back a failed transaction' do
-      original_contents = subject.statements
-      expect(subject).to receive(:rollback_transaction).and_call_original
-
-      expect do
-        subject.transaction(mutable: true) do
-          delete(*@statements)
-          raise 'my error'
-        end
-      end.to raise_error RuntimeError
-
-      expect(subject.statements).to contain_exactly(*original_contents)
-    end
-  end
-
   context "with snapshot support" do
 
     describe '#snapshot' do