feat!(NODE-4435): drop support for nodejs versions below 14

.eslintrc.json

@@ -63,5 +63,17 @@
     "@typescript-eslint/no-unsafe-return": "off",
     "@typescript-eslint/no-unsafe-argument": "off",
     "@typescript-eslint/no-unsafe-call": "off"
-  }
+  },
+  "overrides": [
+    {
+      "parser": "espree",
+      "files": [
+        "*.mjs"
+      ],
+      "parserOptions": {
+        "sourceType": "module",
+        "ecmaVersion": "latest"
+      }
+    }
+  ]
 }

.evergreen/config.yml

@@ -92,46 +92,6 @@ functions:
           - ${PROJECT_DIRECTORY}/.evergreen/run-typescript.sh
 
 tasks:
-  - name: node-tests-v6
-    tags: ["node"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_MAJOR_VERSION: 6
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: node
-  - name: node-tests-v8
-    tags: ["node"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_MAJOR_VERSION: 8
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: node
-  - name: node-tests-v10
-    tags: ["node"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_MAJOR_VERSION: 10
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: node
-  - name: node-tests-v12
-    tags: ["node"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_MAJOR_VERSION: 12
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: node
   - name: node-tests-v14
     tags: ["node"]
     commands:
@@ -162,16 +122,17 @@ tasks:
       - func: run tests
         vars:
           TEST_TARGET: node
-  - name: browser-tests
-    tags: ["browser"]
-    commands:
-      - func: fetch source
-        vars:
-          NODE_MAJOR_VERSION: 16
-      - func: install dependencies
-      - func: run tests
-        vars:
-          TEST_TARGET: browser
+  # TODO(NODE-3555): Karma tests pass locally still after these changes, rhel80 is just missing chrome
+  # - name: browser-tests
+  #   tags: ["browser"]
+  #   commands:
+  #     - func: fetch source
+  #       vars:
+  #         NODE_MAJOR_VERSION: 16
+  #     - func: install dependencies
+  #     - func: run tests
+  #       vars:
+  #         TEST_TARGET: browser
   - name: run-checks
     tags:
       - run-checks
@@ -214,16 +175,12 @@ tasks:
 
 buildvariants:
   - name: linux
-    display_name: Ubuntu 22.04
-    run_on: ubuntu2004-small
-    tasks: [".node", ".browser"]
-  - name: mac
-    display_name: MacOS 10.14
-    run_on: macos-1014
+    display_name: RHEL 8.0
+    run_on: rhel80-small
     tasks: [".node"]
   - name: lint
     display_name: lint
-    run_on: ubuntu2004-small
+    run_on: rhel80-small
     tasks:
       - run-checks
       - check-typescript-oldest

.evergreen/install-dependencies.sh

@@ -55,5 +55,12 @@ registry=https://registry.npmjs.org
 EOT
 
 # install node dependencies
-npm install # npm prepare runs after install and will compile the library
+# npm prepare runs after install and will compile the library
+# TODO(NODE-3555): rollup dependencies for node polyfills have broken peerDeps. We can remove this flag once we've removed them.
+npm install --legacy-peer-deps
+
+set +o xtrace
+echo "Running: nvm use ${NODE_VERSION}"
 nvm use "${NODE_VERSION}" # Switch to the node version we want to test against
+echo "Success: switched to node $(node -v)"
+set -o xtrace

.evergreen/run-checks.sh

@@ -6,4 +6,4 @@ NODE_ARTIFACTS_PATH="${PROJECT_DIRECTORY}/node-artifacts"
 export NVM_DIR="${NODE_ARTIFACTS_PATH}/nvm"
 [ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh"
 
-npm run lint
+npm run check:lint

.evergreen/run-tests.sh

@@ -13,9 +13,10 @@ export NVM_DIR="${NODE_ARTIFACTS_PATH}/nvm"
 
 case $1 in
   "node")
-    npm run test-node
+    npm run check:coverage
     ;;
   "browser")
+    # TODO(NODE-3555): remove explicit browser tests
     npm run test-browser
     ;;
   *)

.mocharc.json

@@ -0,0 +1,17 @@
+{
+  "$schema": "https://raw.githubusercontent.com/SchemaStore/schemastore/master/src/schemas/json/mocharc.json",
+  "require": [
+    "source-map-support/register",
+    "ts-node/register",
+    "./node_modules/chai/register-expect"
+  ],
+  "extension": [
+    "js",
+    "ts"
+  ],
+  "recursive": true,
+  "timeout": 10000,
+  "failZero": true,
+  "sort": true,
+  "color": true
+}

.nycrc.json

@@ -1,4 +1,12 @@
 {
   "extends": "@istanbuljs/nyc-config-typescript",
-  "reporter": ["lcovonly", "text-summary", "html"]
+  "reporter": [
+    "lcovonly",
+    "text-summary",
+    "html"
+  ],
+  "statements": 53,
+  "branches": 38,
+  "functions": 52,
+  "lines": 54
 }