Add #keys method to MemoryStore (#28)

Author: reabiliti

.gitignore

@@ -11,3 +11,4 @@ Gemfile.lock
 .rbnext/
 *.sqlite3
 spec/internal/log/*.log
+.idea/

CHANGELOG.md

@@ -2,6 +2,10 @@
 
 ## master
 
+## 1.0.2 (2020-08-19)
+
+- [PR#28](https://github.com/DmitryTsepelev/graphql-ruby-fragment_cache/pull/28) Support #keys method for GraphQL::FragmentCache::MemoryStore instance ([@reabiliti][])
+
 ## 1.0.1 (2020-06-17)
 
 - [PR#25](https://github.com/DmitryTsepelev/graphql-ruby-fragment_cache/pull/25) Support fragments with aliases for CacheKeyBuilder ([@DmitryTsepelev][])
@@ -47,3 +51,4 @@
 [@DmitryTsepelev]: https://github.com/DmitryTsepelev
 [@palkan]: https://github.com/palkan
 [@ssnickolay]: https://github.com/ssnickolay
+[@reabiliti]: https://github.com/reabiliti

lib/graphql/fragment_cache/memory_store.rb

@@ -23,6 +23,10 @@ def initialize(expires_in: nil, **other)
         @storage = {}
       end
 
+      def keys
+        storage.keys
+      end
+
       def exist?(key)
         storage.key?(key)
       end

spec/graphql/fragment_cache/memory_store_spec.rb

@@ -50,6 +50,17 @@
     end
   end
 
+  context "supports keys interface" do
+    it "returns actual keys" do
+      subject.write(:test_1, "test_1")
+      subject.write(:test_2, "test_2")
+      expect(subject.keys).to eq %w[test_1 test_2]
+
+      subject.delete(:test_2)
+      expect(subject.keys).to eq %w[test_1]
+    end
+  end
+
   it "raises if unsupported options are passed" do
     expect { described_class.new(namespace: "test") }
       .to raise_error(ArgumentError, /unsupported options: namespace/i)