feat(rest-datasource): add apollo-server-cache-redis-cluster package

CHANGELOG.md

@@ -4,6 +4,8 @@
 
 - Allow an optional function to resolve the `rootValue`, passing the `DocumentNode` AST to determine the value. [PR #1555](https://github.com/apollographql/apollo-server/pull/1555)
 - Follow-up on the work in [PR #1516](https://github.com/apollographql/apollo-server/pull/1516) to also fix missing insertion cursor/caret when a custom GraphQL configuration is specified which doesn't specify its own `cursorShape` property. [PR #1607](https://github.com/apollographql/apollo-server/pull/1607)
+- Add `apollo-server-cache-redis-cluster` package to support Redis Cluster and Sentinels. [PR #1770](https://github.com/apollographql/apollo-server/pull/1770)
+
 
 ### v2.1.0
 

__mocks__/ioredis.ts

@@ -0,0 +1,28 @@
+const IORedis = jest.genMockFromModule('ioredis');
+
+const keyValue = {};
+
+const getKey = key => {
+  if (keyValue[key]) {
+    return Promise.resolve(keyValue[key].value);
+  }
+
+  return Promise.resolve(undefined);
+};
+
+const mGetKey = (key, cb) => getKey(key).then((val) => [val]);
+
+const setKey = (key, value, type, ttl) => {
+  keyValue[key] = {
+    value,
+    ttl
+  }
+  setTimeout(() => { delete keyValue[key] }, ttl * 1000);
+  return Promise.resolve(true);
+};
+
+IORedis.prototype.get.mockImplementation(getKey);
+IORedis.prototype.mget.mockImplementation(mGetKey);
+IORedis.prototype.set.mockImplementation(setKey);
+
+export default IORedis;