Split test commands into test.sh, respect CIRCLE_NODE_INDEX

packages/react-navigation/circle.yml

@@ -20,11 +20,7 @@ dependencies:
 
 test:
   override:
-    - yarn test:
-        parallel: true
-    - cd examples/NavigationPlayground && yarn test:
-        parallel: true
-    - cd examples/ReduxExample && yarn test:
+    - ./scripts/test.sh:
         parallel: true
   post:
     - yarn codecov

packages/react-navigation/scripts/test.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -eo pipefail
+
+case $CIRCLE_NODE_INDEX in 
+  0) yarn test ;; 
+  1) cd examples/NavigationPlayground && yarn test ;; 
+  2) cd examples/ReduxExample && yarn test ;; 
+esac