Add Logger#fields and Logger#tags for direct access to the current Buffer's fields and tags

lib/rackstash/logger.rb

@@ -85,6 +85,16 @@ module Rackstash
       end
     end
 
+    # (see Buffer#fields)
+    def fields
+      buffer.fields
+    end
+
+    # (see Buffer#tags)
+    def tags
+      buffer.tags
+    end
+
     # Log a `message` at the DEBUG log level.
     #
     # @param message (see #add)

spec/rackstash/logger_spec.rb

@@ -103,6 +103,34 @@ describe Rackstash::Logger do
     end
   end
 
+  describe '#fields' do
+    it 'gets the current buffer\'s fields' do
+      buffer = instance_double('Rackstash::Buffer')
+      expect(logger).to receive(:buffer).and_return(buffer)
+      expect(buffer).to receive(:fields)
+
+      logger.fields
+    end
+
+    it 'returns a Rackstash::Fields::Hash' do
+      expect(logger.fields).to be_a Rackstash::Fields::Hash
+    end
+  end
+
+  describe '#tags' do
+    it 'gets the current buffer\'s tags' do
+      buffer = instance_double('Rackstash::Buffer')
+      expect(logger).to receive(:buffer).and_return(buffer)
+      expect(buffer).to receive(:tags)
+
+      logger.tags
+    end
+
+    it 'returns a Rackstash::Fields::Tags' do
+      expect(logger.tags).to be_a Rackstash::Fields::Tags
+    end
+  end
+
   describe '#add' do
     let(:messages) { [] }