Fix unofficial Node.js 4 support (#5134)

Author: ai

packages/jest-config/src/normalize.js

@@ -282,10 +282,10 @@ const buildTestPathPattern = (argv: Argv): string => {
   const patterns = [];
 
   if (argv._) {
-    patterns.push(...argv._);
+    patterns.push.apply(patterns, argv._);
   }
   if (argv.testPathPattern) {
-    patterns.push(...argv.testPathPattern);
+    patterns.push.apply(patterns, argv.testPathPattern);
   }
 
   const testPathPattern = patterns.map(replacePathSepForRegex).join('|');

packages/jest-editor-support/src/Runner.js

@@ -99,10 +99,10 @@ export default class Runner extends EventEmitter {
 
   runJestWithUpdateForSnapshots(completion: any, args: string[]) {
     const defaultArgs = ['--updateSnapshot'];
-    const updateProcess = this._createProcess(this.workspace, [
-      ...defaultArgs,
-      ...(args ? args : []),
-    ]);
+    const updateProcess = this._createProcess(
+      this.workspace,
+      [].concat(defaultArgs).concat(args ? args : []),
+    );
     updateProcess.on('close', () => {
       completion();
     });

packages/jest-resolve/src/index.js

@@ -119,13 +119,15 @@ class Resolver {
     const defaultPlatform = this._options.defaultPlatform;
     const extensions = this._options.extensions.slice();
     if (this._supportsNativePlatform()) {
-      extensions.unshift(
-        ...this._options.extensions.map(ext => '.' + NATIVE_PLATFORM + ext),
+      extensions.unshift.apply(
+        extensions,
+        this._options.extensions.map(ext => '.' + NATIVE_PLATFORM + ext),
       );
     }
     if (defaultPlatform) {
-      extensions.unshift(
-        ...this._options.extensions.map(ext => '.' + defaultPlatform + ext),
+      extensions.unshift.apply(
+        extensions,
+        this._options.extensions.map(ext => '.' + defaultPlatform + ext),
       );
     }