feat: Upgrade Redis 3 to 4 (#8293)

BREAKING CHANGE: This release upgrades to Redis 4; if you are using the Redis cache adapter with Parse Server then this is a breaking change as the Redis client options have changed; see the [Redis migration guide](https://github.com/redis/node-redis/blob/redis%404.0.0/docs/v3-to-v4.md) for more details (#8293)

spec/DefinedSchemas.spec.js

@@ -677,4 +677,33 @@ describe('DefinedSchemas', () => {
     expect(testSchema.classLevelPermissions.create).toEqual({ requiresAuthentication: true });
     expect(logger.error).toHaveBeenCalledTimes(0);
   });
+
+  it('should not affect cacheAdapter', async () => {
+    const server = await reconfigureServer();
+    const logger = require('../lib/logger').logger;
+    spyOn(logger, 'error').and.callThrough();
+    const migrationOptions = {
+      definitions: [
+        {
+          className: 'Test',
+          fields: { aField: { type: 'String' } },
+          indexes: { aField: { aField: 1 } },
+          classLevelPermissions: {
+            create: { requiresAuthentication: true },
+          },
+        },
+      ],
+    };
+
+    const cacheAdapter = {
+      get: () => Promise.resolve(null),
+      put: () => {},
+      del: () => {},
+      clear: () => {},
+      connect: jasmine.createSpy('clear'),
+    };
+    server.config.cacheAdapter = cacheAdapter;
+    await new DefinedSchemas(migrationOptions, server.config).execute();
+    expect(cacheAdapter.connect).not.toHaveBeenCalled();
+  });
 });

spec/RedisCacheAdapter.spec.js

@@ -19,23 +19,22 @@ describe_only(() => {
 
   beforeEach(async () => {
     cache = new RedisCacheAdapter(null, 100);
+    await cache.connect();
     await cache.clear();
   });
 
-  it('should get/set/clear', done => {
+  it('should get/set/clear', async () => {
     const cacheNaN = new RedisCacheAdapter({
       ttl: NaN,
     });
-
-    cacheNaN
-      .put(KEY, VALUE)
-      .then(() => cacheNaN.get(KEY))
-      .then(value => expect(value).toEqual(VALUE))
-      .then(() => cacheNaN.clear())
-      .then(() => cacheNaN.get(KEY))
-      .then(value => expect(value).toEqual(null))
-      .then(() => cacheNaN.clear())
-      .then(done);
+    await cacheNaN.connect();
+    await cacheNaN.put(KEY, VALUE);
+    let value = await cacheNaN.get(KEY);
+    expect(value).toEqual(VALUE);
+    await cacheNaN.clear();
+    value = await cacheNaN.get(KEY);
+    expect(value).toEqual(null);
+    await cacheNaN.clear();
   });
 
   it('should expire after ttl', done => {
@@ -100,7 +99,7 @@ describe_only(() => {
   it('handleShutdown, close connection', async () => {
     await cache.handleShutdown();
     setTimeout(() => {
-      expect(cache.client.connected).toBe(false);
+      expect(cache.client.isOpen).toBe(false);
     }, 0);
   });
 });
@@ -122,8 +121,9 @@ describe_only(() => {
     return Object.keys(cache.queue.queue).length;
   }
 
-  it('it should clear completed operations from queue', done => {
+  it('it should clear completed operations from queue', async done => {
     const cache = new RedisCacheAdapter({ ttl: NaN });
+    await cache.connect();
 
     // execute a bunch of operations in sequence
     let promise = Promise.resolve();
@@ -144,8 +144,9 @@ describe_only(() => {
     promise.then(() => expect(getQueueCount(cache)).toEqual(0)).then(done);
   });
 
-  it('it should count per key chained operations correctly', done => {
+  it('it should count per key chained operations correctly', async done => {
     const cache = new RedisCacheAdapter({ ttl: NaN });
+    await cache.connect();
 
     let key1Promise = Promise.resolve();
     let key2Promise = Promise.resolve();