scripts/test: Use maxWorkers=4 when running on CI

suutari-ai · suutari-ai · commit 43ba47ae8711 · 2018-01-15T10:53:05.000+02:00
It seems that Jest runs much faster in Travis when it's ran with this
flag.  E.g. for one particular project, this made the frontend testing
time drop from 20 minutes to 2 minutes.
diff --git a/packages/react-scripts/scripts/test.js b/packages/react-scripts/scripts/test.js
@@ -32,6 +32,9 @@ const argv = process.argv.slice(2);
 if (!process.env.CI && argv.indexOf('--coverage') < 0) {
   argv.push('--watch');
 }
+else {
+  argv.push('--maxWorkers=4');
+}
 
 // @remove-on-eject-begin
 // This is not necessary after eject because we embed config into package.json.

Original file line number	Diff line number	Diff line change
`@@ -32,6 +32,9 @@ const argv = process.argv.slice(2);`
`32`	`32`	`if (!process.env.CI && argv.indexOf('--coverage') < 0) {`
`33`	`33`	`argv.push('--watch');`
`34`	`34`	`}`
	`35`	`+else {`
	`36`	`+ argv.push('--maxWorkers=4');`
	`37`	`+}`
`35`	`38`
`36`	`39`	`// @remove-on-eject-begin`
`37`	`40`	`// This is not necessary after eject because we embed config into package.json.`