Filter out AppRegistry logs from output (facebook#47658)

Summary:
Pull Request resolved: facebook#47658

Changelog: [internal]

AppRegistry logs are showing up again in Fantom because we changed the order and now they're not necessarily showing up last.

This fixes that by filtering them out in any position.

Reviewed By: sammy-SC

Differential Revision: D66094274

fbshipit-source-id: bd37394252ee6309f7093567f9a2b73b641938ce

jest/integration/runner/runner.js

@@ -30,15 +30,10 @@ function parseRNTesterCommandResult(
 ): {logs: string, testResult: TestSuiteResult} {
   const stdout = result.stdout.toString();
 
-  const outputArray = stdout.trim().split('\n');
-
-  // Remove AppRegistry logs at the end
-  while (
-    outputArray.length > 0 &&
-    outputArray[outputArray.length - 1].startsWith('Running "')
-  ) {
-    outputArray.pop();
-  }
+  const outputArray = stdout
+    .trim()
+    .split('\n')
+    .filter(log => !log.startsWith('Running "')); // remove AppRegistry logs.
 
   // The last line should be the test output in JSON format
   const testResultJSON = outputArray.pop();