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Fix `run-ios` not turning on Simulator app

Right now, `run-ios` will "boot" Simulator in the headless mode in the background, as long as the is not running. It is exactly what "detox" does - it executes your test suite in the background.

It seems to me that the author of this change was testing it with `` open.

In order to fix this behavior, we have to make sure it runs before we attempt booting.

This passed through the release process since we don't use `run-ios` there (it recommends turning on XCode and testing manually which is what I have done recently too).

Differential Revision: D7535693

Pulled By: hramos

fbshipit-source-id: 881db7740ace805ecefb98bfdb660e32aafd4664
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grabbou authored and facebook-github-bot committed Apr 6, 2018
1 parent c2b9be0 commit 9736ddc061e9c4291df8a3185c7f9d6f73e435c7
Showing with 18 additions and 0 deletions.
  1. +18 −0 local-cli/runIOS/runIOS.js
@@ -112,6 +112,24 @@ function runOnSimulator(xcodeProject, args, scheme) {
if (!selectedSimulator) {
throw new Error(`Could not find ${args.simulator} simulator`);
* Booting simulator through `xcrun simctl boot` will boot it in the `headless` mode
* (running in the background).
* In order for user to see the app and the simulator itself, we have to make sure
* that the is running.
* We also pass it `-CurrentDeviceUDID` so that when we launch it for the first time,
* it will not boot the "default" device, but the one we set. If the app is already running,
* this flag has no effect.
child_process.execFileSync('open', [
if (!selectedSimulator.booted) {
const simulatorFullName = formattedDeviceName(selectedSimulator);

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