[API] Updates count, related to #1534

Author: picandocodigo

elasticsearch-api/lib/elasticsearch/api/actions/count.rb

@@ -55,7 +55,11 @@ def count(arguments = {})
 
         _type = arguments.delete(:type)
 
-        method = Elasticsearch::API::HTTP_POST
+        method = if arguments[:body]
+                   Elasticsearch::API::HTTP_POST
+                 else
+                   Elasticsearch::API::HTTP_GET
+                 end
         path   = if _index && _type
                    "#{Utils.__listify(_index)}/#{Utils.__listify(_type)}/_count"
                  elsif _index

elasticsearch-api/spec/elasticsearch/api/actions/count_spec.rb

@@ -18,10 +18,9 @@
 require 'spec_helper'
 
 describe 'client#count' do
-
   let(:expected_args) do
     [
-      'POST',
+      'GET',
       '_count',
       {},
       nil,
@@ -34,10 +33,9 @@
   end
 
   context 'when an index and type are specified' do
-
     let(:expected_args) do
       [
-        'POST',
+        'GET',
         'foo,bar/t1,t2/_count',
         {},
         nil,
@@ -51,7 +49,6 @@
   end
 
   context 'when there is a query provided' do
-
     let(:expected_args) do
       [
         'POST',

elasticsearch/spec/unit/elasticsearch_product_validation_spec.rb

@@ -25,7 +25,7 @@
       .to_return(status: status, body: body, headers: headers)
   end
   let(:count_request_stub) do
-    stub_request(:post, "#{host}/_count")
+    stub_request(:get, "#{host}/_count")
       .to_return(status: 200, body: nil, headers: {})
   end
   let(:status) { 200 }
@@ -38,7 +38,7 @@
   def error_requests_and_expectations(message = Elasticsearch::NOT_ELASTICSEARCH_WARNING)
     expect { client.count }.to raise_error Elasticsearch::UnsupportedProductError, message
     assert_requested :get, host
-    assert_not_requested :post, "#{host}/_count"
+    assert_not_requested :get, "#{host}/_count"
     expect { client.cluster.health }.to raise_error Elasticsearch::UnsupportedProductError, message
     expect(client.instance_variable_get('@verified')).to be false
     expect { client.cluster.health }.to raise_error Elasticsearch::UnsupportedProductError, message
@@ -51,7 +51,7 @@ def valid_requests_and_expectations
     client.count
     expect(client.instance_variable_get('@verified'))
     assert_requested :get, host
-    assert_requested :post, "#{host}/_count"
+    assert_requested :get, "#{host}/_count"
   end
 
   context 'When Elasticsearch replies with status 401' do