test: set cacheRoot to checksum download (#1540)

Author: erickzhao

.circleci/config.yml

@@ -35,7 +35,10 @@ steps-ci: &steps-ci
           *) yarn install --frozen-lockfile ;;
         esac
     - *step-restore-electron-cache
-    - run: test/ci/_before_script.js
+    - run:
+        name: Download Electron binaries
+        command: |
+          node test/ci/_before_script.js
     - *step-save-electron-cache
     - run: yarn run lint
     - run: yarn run tsd

test/_setup.js

@@ -49,6 +49,7 @@ async function downloadAll (version) {
 async function downloadElectronChecksum (version) {
   return downloadArtifact({
     isGeneric: true,
+    cacheRoot: path.join(os.homedir(), '.electron'),
     version,
     artifactName: 'SHASUMS256.txt'
   })