Testing - Limit 2 API calls per second

Author: tareqtms

tests/TestResource.php

@@ -14,8 +14,10 @@ class TestResource extends \PHPUnit_Framework_TestCase
      */
     public static $shopify;
 
+    public static $microtimeOfLastAPICall;
+
     /**
-     * Initial setup for the tests to run
+     * @inheritDoc
      */
     public static function setUpBeforeClass()
     {
@@ -28,8 +30,34 @@ public static function setUpBeforeClass()
         self::$shopify = ShopifySDK::config($config);
     }
 
+    /**
+     * @inheritDoc
+     */
     public static function tearDownAfterClass()
     {
         self::$shopify = null;
     }
+
+    /**
+     * @inheritDoc
+     */
+    public function setUp()
+    {
+        if(static::$microtimeOfLastAPICall == null) {
+            //Maintain 2 seconds per call
+            usleep(500000);
+        } else {
+            $now = microtime(true);
+            $timeSinceLastCall = $now - static::$microtimeOfLastAPICall;
+            //Ensure 2 API calls per second
+            if($timeSinceLastCall < .5) {
+                $timeToWait = .5 - $timeSinceLastCall;
+                //convert time to microseconds
+                $microSecondsToWait = $timeToWait * 1000000;
+                //Wait to maintain the API call difference of .5 seconds
+                usleep($microSecondsToWait);
+            }
+        }
+        static::$microtimeOfLastAPICall = microtime(true);
+    }
 }