Add 2 more collection endpoints

lib/metabase/endpoint/collection.rb

@@ -11,6 +11,26 @@ module Collection
       def collections(**params)
         get('/api/collection', **params)
       end
+
+      # Fetch a specific collection.
+      #
+      # @param collection_id [Integer, String] Collection ID
+      # @return [Array<Hash>] Parsed response JSON
+      # @see https://github.com/metabase/metabase/blob/master/docs/api-documentation.md#get-apicollectionid
+      def collection(collection_id, **params)
+        get("/api/collection/#{collection_id}", **params)
+      end
+
+      # Fetch a specific collection items.
+      #
+      # @param collection_id [Integer, String] Collection ID
+      # @param model [String] value may be nil, or card, collection, dashboard, pulse or snippet.
+      # @param archived [Boolean]
+      # @return [Array<Hash>] Parsed response JSON
+      # @see https://github.com/metabase/metabase/blob/master/docs/api-documentation.md#get-apicollectioniditems
+      def collection_items(collection_id, **params)
+        get("/api/collection/#{collection_id}/items", **params)
+      end
     end
   end
 end

spec/metabase/endpoint/collection_spec.rb

@@ -11,4 +11,22 @@
       end
     end
   end
+
+  describe 'collection', vcr: true do
+    context 'success' do
+      it 'returns collection' do
+        collection = client.collection(1)
+        expect(collection).to be_kind_of(Array)
+      end
+    end
+  end
+
+  describe 'collection_items', vcr: true do
+    context 'success' do
+      it 'returns collection items' do
+        collection_items = client.collection_items(1)
+        expect(collection_items).to be_kind_of(Array)
+      end
+    end
+  end
 end