[Fix #679] Clear cache (#782)

CHANGELOG.md

@@ -10,6 +10,7 @@
 
 ### Changes
 
+  * [#679](https://github.com/toptal/chewy/issues/679): Wrapped `Elasticsearch::API::Indices::Actions#clear_cache` with `.clear_cache` in Index class ([@Vitalina-Vakulchyk][])
   * [#495](https://github.com/toptal/chewy/issues/495): Ability to change Rails console strategy with `Chewy.console_strategy` ([@Vitalina-Vakulchyk][])
   * [#778](https://github.com/toptal/chewy/pull/778): **(Breaking)** Drop support for Ruby 2.5 ([@Vitalina-Vakulchyk][])
   * [#776](https://github.com/toptal/chewy/pull/776): **(Breaking)** Removal of unnecessary features and integrations ([@Vitalina-Vakulchyk][]):

README.md

@@ -16,7 +16,7 @@ Chewy is an ODM (Object Document Mapper), built on top of the [the official Elas
     * [Elasticsearch compatibility matrix](#elasticsearch-compatibility-matrix)
     * [Active Record](#active-record)
 * [Getting Started](#getting-started)
-    * [Minimal client setting](*minimal-client-setting)
+    * [Minimal client setting](#minimal-client-setting)
     * [Elasticsearch](#elasticsearch)
     * [Index](#index)
     * [Model](#model)

lib/chewy/index/actions.rb

@@ -221,6 +221,10 @@ def journal
           @journal ||= Chewy::Journal.new(self)
         end
 
+        def clear_cache(args = {index: index_name})
+          client.indices.clear_cache(args)
+        end
+
       private
 
         def optimize_index_settings(index_name)

spec/chewy/index/actions_spec.rb

@@ -680,4 +680,55 @@
   describe '.journal' do
     specify { expect(DummiesIndex.journal).to be_a(Chewy::Journal) }
   end
+
+  describe '.clear_cache' do
+    before do
+      stub_model(:city)
+      stub_index(:cities) do
+        define_type City
+      end
+    end
+
+    let(:index_name) { 'test_index' }
+    let(:index_name_with_prefix) { 'cities_test_index' }
+    let(:unexisted_index_name) { 'wrong_index' }
+
+    context 'with existing index' do
+      before do
+        CitiesIndex.create(index_name)
+      end
+
+      specify do
+        expect(CitiesIndex)
+          .to receive(:clear_cache)
+          .and_call_original
+        expect { CitiesIndex.clear_cache({index: index_name_with_prefix}) }
+          .not_to raise_error Elasticsearch::Transport::Transport::Errors::NotFound
+      end
+    end
+
+    context 'with unexisting index' do
+      specify do
+        expect(CitiesIndex)
+          .to receive(:clear_cache)
+          .and_call_original
+        expect { CitiesIndex.clear_cache({index: unexisted_index_name}) }
+          .to raise_error Elasticsearch::Transport::Transport::Errors::NotFound
+      end
+    end
+
+    context 'without arguments' do
+      before do
+        CitiesIndex.create
+      end
+
+      specify do
+        expect(CitiesIndex)
+          .to receive(:clear_cache)
+          .and_call_original
+        expect { CitiesIndex.clear_cache }
+          .not_to raise_error Elasticsearch::Transport::Transport::Errors::NotFound
+      end
+    end
+  end
 end