chore(NODE-3717): test reorg - the conclusion (#3105)

Author: dariakp

.mocharc.json

@@ -12,6 +12,7 @@
   "ui": "test/tools/runner/metadata_ui.js",
   "recursive": true,
   "timeout": 60000,
+  "failZero": true,
   "reporter": "test/tools/reporter/mongodb_reporter.js",
   "sort": true,
   "color": true

global.d.ts

@@ -58,6 +58,16 @@ declare global {
        * - my test
        *   - TODO(NODE-XXXX): Feature implementation impending!
        * ```
+       * 
+       * You can also skip a set of tests via beforeEach:
+       * ```
+       * beforeEach(() => {
+       *   if ('some condition') {
+       *     this.currentTest.skipReason = 'requires <run condition> to run';
+       *     this.skip();
+       *   }
+       * });
+       * ```
        */
       skipReason?: string;
     }

package.json

@@ -104,8 +104,8 @@
     "check:eslint": "eslint -v && eslint --max-warnings=0 --ext '.js,.ts' src test",
     "check:tsd": "tsd --version && tsd",
     "check:dts": "./node_modules/typescript/bin/tsc --noEmit mongodb.d.ts && tsd",
-    "check:test": "mocha --file test/tools/runner --recursive test/functional test/integration",
-    "check:unit": "mocha --recursive test/unit/",
+    "check:test": "mocha --file test/tools/runner test/integration",
+    "check:unit": "mocha test/unit/",
     "check:ts": "./node_modules/typescript/bin/tsc -v && ./node_modules/typescript/bin/tsc --noEmit",
     "check:atlas": "mocha --config \"test/manual/mocharc.json\" test/manual/atlas_connectivity.test.js",
     "check:adl": "mocha --file test/tools/runner test/manual/data_lake.test.js",
@@ -116,7 +116,7 @@
     "check:ldap": "mocha --config \"test/manual/mocharc.json\" test/manual/ldap.test.js",
     "check:socks5": "mocha --config \"test/manual/mocharc.json\" test/manual/socks5.test.ts",
     "check:csfle": "mocha --file test/tools/runner test/integration/client-side-encryption",
-    "check:snappy": "mocha --file test/tools/runner test/functional/unit_snappy.test.js",
+    "check:snappy": "mocha test/unit/assorted/snappy.test.js",
     "prepare": "node etc/prepare.js",
     "release": "standard-version -i HISTORY.md",
     "test": "npm run check:lint && npm run test:all",