From f86975f78e12a034235094bb7ebfa37501dd3f62 Mon Sep 17 00:00:00 2001
From: Ari Lazier <alazier@gmail.com>
Date: Thu, 4 Aug 2016 11:11:32 -0700
Subject: [PATCH] wipe simulators between runs

---
 scripts/reset-simulators.sh | 59 +++++++++++++++++++++++++++++++++++++
 scripts/test.sh             | 12 +-------
 2 files changed, 60 insertions(+), 11 deletions(-)
 create mode 100755 scripts/reset-simulators.sh

diff --git a/scripts/reset-simulators.sh b/scripts/reset-simulators.sh
new file mode 100755
index 00000000..3404b145
--- /dev/null
+++ b/scripts/reset-simulators.sh
@@ -0,0 +1,59 @@
+#!/bin/bash
+
+set -o pipefail
+set -e
+
+while pgrep -q Simulator; do
+    # Kill all the current simulator processes as they may be from a
+    # different Xcode version
+    pkill Simulator 2>/dev/null || true
+    # CoreSimulatorService doesn't exit when sent SIGTERM
+    pkill -9 Simulator 2>/dev/null || true
+  done
+
+# Shut down simulators until there's no booted ones left
+# Only do one at a time because devices sometimes show up multiple times
+while xcrun simctl list | grep -q Booted; do
+  xcrun simctl list | grep Booted | sed 's/.* (\(.*\)) (Booted)/\1/' | head -n 1 | xargs xcrun simctl shutdown
+done
+
+# Clean up all available simulators
+(
+    previous_device=''
+    IFS=$'\n' # make newlines the only separator
+    for LINE in $(xcrun simctl list); do
+        if [[ $LINE =~ unavailable || $LINE =~ disconnected ]]; then
+            # skip unavailable simulators
+            continue
+        fi
+
+        if [[ $LINE =~ "--" ]]; then
+            # Reset the last seen device so we won't consider devices with the same name to be duplicates
+            # if they appear in different sections.
+            previous_device=""
+            continue
+        fi
+
+        regex='^(.*) [(]([0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12})[)]'
+        if [[ $LINE =~ $regex ]]; then
+            device="${BASH_REMATCH[1]}"
+            guid="${BASH_REMATCH[2]}"
+
+            # Delete the simulator if it's a duplicate of the last seen one
+            # Otherwise delete all contents and settings for it
+            if [[ $device == $previous_device ]]; then
+                xcrun simctl delete $guid
+            else
+                xcrun simctl erase $guid
+                previous_device="$device"
+            fi
+        fi
+    done
+)
+
+if [[ -a "${DEVELOPER_DIR}/Applications/iOS Simulator.app" ]]; then
+    open "${DEVELOPER_DIR}/Applications/iOS Simulator.app"
+elif [[ -a "${DEVELOPER_DIR}/Applications/Simulator.app" ]]; then
+    open "${DEVELOPER_DIR}/Applications/Simulator.app"
+fi
+
diff --git a/scripts/test.sh b/scripts/test.sh
index 049ef86e..a6c7cc36 100755
--- a/scripts/test.sh
+++ b/scripts/test.sh
@@ -30,16 +30,6 @@ cleanup() {
   rm -f "$PACKAGER_OUT" "$LOGCAT_OUT"
 }
 
-kill_ios_simulator() {
-  while pgrep -q Simulator; do
-    # Kill all the current simulator processes as they may be from a
-    # different Xcode version
-    pkill Simulator 2>/dev/null || true
-    # CoreSimulatorService doesn't exit when sent SIGTERM
-    pkill -9 Simulator 2>/dev/null || true
-  done
-}
-
 open_chrome() {
   local dir
   for dir in "$HOME/Applications" "/Applications"; do
@@ -65,7 +55,7 @@ start_packager() {
 }
 
 xctest() {
-  kill_ios_simulator
+  ${SRCROOT}/scripts/reset-simulators.sh 
 
   local dest="$(xcrun simctl list devices | grep -v unavailable | grep -m 1 -o '[0-9A-F\-]\{36\}')"
   xcodebuild -scheme "$1" -configuration "$CONFIGURATION" -sdk iphonesimulator -destination id="$dest" build test