Add tests against multiple MongoDB versions (#7161)

* added tests environment with mongodb 4.4.3

* added CI test for mongodb 4.4.3

* added CI tests for MongoDB versions 4.0, 4.2

* improved flaky test (seems to max out the limit of simultaneous connections)

* added spec helpers to run tests only for specific MongoDB version

* addedn npm scripts to run tests against relevant mongodb versions

* added spec helper function to exclude specific mongodb version

* added test for changed aggregate query planner results

* fixed regex test with incorrect regex syntax

* fixed test where query has select no keys (empty array)

* added changelog entry and ordered list

* fixed test that tried to simultaneously delete and build index on same collection

* added MongoDB compatibility table to readme

* updated default local tests to use MongoDB 4.4.3

* added MongoDB badges for new versions to README

* fixed typo in readme

* added new test helper filter to contribution guide

* fixed incorrect storage engine for mongodb 4.4

* changed CI to test MongoDB 3.6. with mmapv1 storage engine and standalone

* improved CI test description

* added CI self check for new MongoDB versions

* fixed CI

* removed CI

* added CI

* added throwing error if any of the checks failed

* added github action connector

* improved error message

* improved error messages

* improved error message

* updated CI environment to MongoDB 3.6.22

* improved error messages

* update CI env name

* updated CI env name

* improved error message

* removed patch versions from CI env description

* improved status message

* removed version range from core lib

* added explicit mongodb version to redis test and node 12 test

* bumped Node 12 test to 12.20.1 (version currently recommended by AWS Elastic Beanstalk)

.github/workflows/ci.yml

@@ -11,23 +11,62 @@ env:
   NODE_VERSION: 10
   PARSE_SERVER_TEST_TIMEOUT: 20000
 jobs:
+  check-ci:
+    name: CI Self-Check
+    timeout-minutes: 30
+    runs-on: ubuntu-18.04
+    steps:
+      - uses: actions/checkout@v2
+      - name: Use Node.js ${{ matrix.NODE_VERSION }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - name: Cache Node.js modules
+        uses: actions/cache@v2
+        with:
+          path: ~/.npm
+          key: ${{ runner.os }}-node-${{ matrix.NODE_VERSION }}-${{ hashFiles('**/package-lock.json') }}
+          restore-keys: |
+            ${{ runner.os }}-node-${{ matrix.NODE_VERSION }}-
+      - name: Install dependencies
+        run: npm ci
+      - name: CI Self-Check
+        run: npm run ci:check
   check-mongo:
     strategy:
       matrix:
         include:
-          - name: Mongo 4.0.4, ReplicaSet, WiredTiger
-            MONGODB_VERSION: 4.0.4
+          - name: Mongo 4.4, ReplicaSet, WiredTiger
+            MONGODB_VERSION: 4.4.3
             MONGODB_TOPOLOGY: replicaset
             MONGODB_STORAGE_ENGINE: wiredTiger
             NODE_VERSION: 10
-          - name: Mongo 3.6.21
-            MONGODB_VERSION: 3.6.21
+          - name: Mongo 4.2, ReplicaSet, WiredTiger
+            MONGODB_VERSION: 4.2.12
+            MONGODB_TOPOLOGY: replicaset
+            MONGODB_STORAGE_ENGINE: wiredTiger
+            NODE_VERSION: 10
+          - name: Mongo 4.0, ReplicaSet, WiredTiger
+            MONGODB_VERSION: 4.0.22
+            MONGODB_TOPOLOGY: replicaset
+            MONGODB_STORAGE_ENGINE: wiredTiger
+            NODE_VERSION: 10
+          - name: Mongo 3.6, Standalone, MMAPv1
+            MONGODB_VERSION: 3.6.22
+            MONGODB_TOPOLOGY: standalone
+            MONGODB_STORAGE_ENGINE: mmapv1
             NODE_VERSION: 10
           - name: Redis Cache
             PARSE_SERVER_TEST_CACHE: redis
+            MONGODB_VERSION: 4.4.3
+            MONGODB_TOPOLOGY: standalone
+            MONGODB_STORAGE_ENGINE: wiredTiger
             NODE_VERSION: 10
-          - name: Node 12.12.0
-            NODE_VERSION: 12.12.0
+          - name: Node 12.20
+            MONGODB_VERSION: 4.4.3
+            MONGODB_TOPOLOGY: standalone
+            MONGODB_STORAGE_ENGINE: wiredTiger
+            NODE_VERSION: 12.20.1
     name: ${{ matrix.name }}
     timeout-minutes: 30
     runs-on: ubuntu-18.04