Adding possibility to send body null and tests

lib/meilisearch/http_request.rb

@@ -63,7 +63,7 @@ def send_request(http_method, relative_path, query_params = nil, body = nil)
     end
 
     def http_config(query_params, body)
-      body = body.to_json unless body.nil?
+      body = body.to_json
       {
         headers: @headers,
         query: query_params,

spec/meilisearch/index/settings_spec.rb

@@ -113,6 +113,13 @@
       expect(index.ranking_rules).to eq(ranking_rules)
     end
 
+    it 'updates ranking rules at null' do
+      response = index.update_ranking_rules(nil)
+      expect(response).to have_key('updateId')
+      index.wait_for_pending_update(response['updateId'])
+      expect(index.ranking_rules).to eq(default_ranking_rules)
+    end
+
     it 'fails when updating with wrong ranking rules name' do
       expect do
         index.update_ranking_rules(wrong_ranking_rules)
@@ -150,6 +157,13 @@
       expect(index.distinct_attribute).to eq(distinct_attribute)
     end
 
+    it 'updates distinct attribute at null' do
+      response = index.update_distinct_attribute(nil)
+      expect(response).to have_key('updateId')
+      index.wait_for_pending_update(response['updateId'])
+      expect(index.distinct_attribute).to be_nil
+    end
+
     it 'resets distinct attribute' do
       response = index.reset_distinct_attribute
       expect(response).to have_key('updateId')
@@ -181,6 +195,13 @@
       expect(index.searchable_attributes).to eq(searchable_attributes)
     end
 
+    it 'updates searchable attributes at null' do
+      response = index.update_searchable_attributes(nil)
+      expect(response).to have_key('updateId')
+      index.wait_for_pending_update(response['updateId'])
+      expect(index.searchable_attributes).to eq(default_searchable_attributes)
+    end
+
     it 'resets searchable attributes' do
       response = index.reset_searchable_attributes
       expect(response).to have_key('updateId')
@@ -213,6 +234,13 @@
       expect(index.displayed_attributes).to contain_exactly(*displayed_attributes)
     end
 
+    it 'updates displayed attributes at null' do
+      response = index.update_displayed_attributes(nil)
+      expect(response).to have_key('updateId')
+      index.wait_for_pending_update(response['updateId'])
+      expect(index.displayed_attributes).to eq(default_displayed_attributes)
+    end
+
     it 'resets displayed attributes' do
       response = index.reset_displayed_attributes
       expect(response).to have_key('updateId')
@@ -366,6 +394,13 @@
       expect(index.attributes_for_faceting).to contain_exactly(*attributes_for_faceting)
     end
 
+    it 'updates attributes at null' do
+      response = index.update_attributes_for_faceting(nil)
+      expect(response).to have_key('updateId')
+      index.wait_for_pending_update(response['updateId'])
+      expect(index.attributes_for_faceting).to be_empty
+    end
+
     it 'resets attributes for faceting' do
       response = index.reset_attributes_for_faceting
       expect(response).to have_key('updateId')