fix replace with delete

tests/index.js

@@ -5,10 +5,17 @@ import * as text from './y-text.tests.js'
 import * as xml from './y-xml.tests.js'
 
 import { runTests } from 'lib0/testing.js'
-import { isBrowser } from 'lib0/environment.js'
+import { isBrowser, isNode } from 'lib0/environment.js'
 import * as log from 'lib0/logging.js'
 
 if (isBrowser) {
   log.createVConsole(document.body)
 }
-runTests({ map, array, text, xml })
+runTests({
+  map, array, text, xml
+}).then(success => {
+  /* istanbul ignore next */
+  if (isNode) {
+    process.exit(success ? 0 : 1)
+  }
+})