refactor: worker-pool uses default count and not collect coverage in appveyor

.circleci/config.yml

@@ -49,7 +49,7 @@ jobs:
           at: ~/project
       - run:
           name: Build Fixtures
-          command: yarn build && yarn test:fixtures && yarn coverage
+          command: yarn build && yarn test:fixtures -w=4 --coverage && yarn coverage
       - persist_to_workspace:
           root: ~/project
           paths:
@@ -65,7 +65,7 @@ jobs:
           at: ~/project
       - run:
           name: Unit Test
-          command: yarn test:unit && yarn coverage
+          command: yarn test:unit -w=4 --coverage && yarn coverage
     environment:
       - NODE_ENV: "test"
 

jest.config.js

@@ -10,5 +10,6 @@ module.exports = {
   moduleFileExtensions: ['js', 'mjs', 'json'],
   expand: true,
   forceExit: true,
+  // https://github.com/facebook/jest/pull/6747 fix warning here
   detectOpenHandles: true
 }

package.json

@@ -58,10 +58,10 @@
     "prebuild": "yarn clean",
     "security": "nsp check || true",
     "test": "yarn test:fixtures && yarn test:unit",
-    "test:fixtures": "jest --maxWorkers=4 --coverage test/fixtures",
-    "test:e2e": "jest --maxWorkers=1 test/e2e",
+    "test:fixtures": "jest test/fixtures",
+    "test:e2e": "jest -i test/e2e",
     "test:lint": "yarn lint && yarn security",
-    "test:unit": "jest --maxWorkers=4 --coverage test/unit"
+    "test:unit": "jest test/unit"
   },
   "engines": {
     "node": ">=8.0.0",