fix tests

Author: jsvd

lib/logstash/inputs/elasticsearch/aggregation.rb

@@ -12,6 +12,7 @@ def initialize(client, plugin)
           @client = client
           @plugin_params = plugin.params
 
+          @index = @plugin_params["index"]
           @size = @plugin_params["size"]
           @retries = @plugin_params["retries"]
           @plugin = plugin

spec/inputs/elasticsearch_spec.rb

@@ -1151,7 +1151,7 @@ def wait_receive_request
 
     context "when there's an exception" do
       before(:each) do
-        allow(client).to receive(:search).and_raise RuntimeError
+        allow(client).to receive(:search).and_raise RuntimeError.new("test exception")
       end
       it 'produces no events' do
         plugin.run queue
@@ -1296,6 +1296,10 @@ def wait_receive_request
 
     let(:mock_queue) { double('queue', :<< => nil) }
 
+    before(:each) do
+      plugin.send(:setup_cursor_tracker)
+    end
+
     it 'pushes a generated event to the queue' do
       plugin.send(:push_hit, hit, mock_queue)
       expect(mock_queue).to have_received(:<<) do |event|