add options to the lazy document header

Gemfile.lock

@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    esse (0.3.4)
+    esse (0.3.5)
       multi_json
       thor (>= 0.19)
 

lib/esse/document.rb

@@ -94,6 +94,7 @@ def doc_header
       { _id: id }.tap do |h|
         h[:_type] = type if type
         h[:routing] = routing if routing?
+        h.merge!(options)
       end
     end
 

lib/esse/lazy_document_header.rb

@@ -61,6 +61,10 @@ def routing
       @attributes[:routing]
     end
 
+    def options
+      @attributes.reject { |key, _| %i[_id _type routing].include?(key) }
+    end
+
     def to_doc(source = {})
       HashDocument.new(source.merge(@attributes))
     end

spec/esse/document_spec.rb

@@ -171,6 +171,12 @@ def routing
         expect(document.doc_header).to eq(_id: 1, routing: 'bar')
       end
     end
+
+    context 'when the document includes options' do
+      let(:options) { { foo: 'bar' } }
+
+      it { is_expected.to eq(_id: 1, _type: 'foo', routing: 'bar', foo: 'bar') }
+    end
   end
 
   describe '#mutate' do

spec/esse/lazzy_document_header_spec.rb

@@ -3,7 +3,7 @@
 require 'spec_helper'
 
 RSpec.describe Esse::LazyDocumentHeader do
-  let(:doc) { described_class.new(object) }
+  let(:doc) { described_class.new(object.merge(options)) }
   let(:object) { {} }
   let(:options) { {} }
 
@@ -190,4 +190,20 @@
       expect(doc.to_doc(foo: 'bar').source).to eq(object.merge(foo: 'bar'))
     end
   end
+
+  describe '#options' do
+    it { expect(doc).to respond_to :options }
+
+    it 'returns an empty hash' do
+      expect(doc.options).to eq({})
+    end
+
+    context 'when options are present' do
+      let(:options) { { foo: 'bar' } }
+
+      it 'returns the options' do
+        expect(doc.options).to eq(options)
+      end
+    end
+  end
 end