Adding ProcessMaker\Util\Common class utility and unit test

workflow/engine/src/Tests/ProcessMaker/Util/CommonTest.php

@@ -0,0 +1,37 @@
+<?php
+namespace Tests\ProcessMaker\Util;
+
+
+use ProcessMaker\Util;
+
+/**
+ * Class XmlExporterTest
+ *
+ * @package Tests\ProcessMaker\Project
+ * @author Erik Amaru Ortiz <aortiz.erik@gmail.com, erik@colosa.com>
+ */
+class XmlExporterTest extends \PHPUnit_Framework_TestCase
+{
+    function testGetLastVersion()
+    {
+        $lastVer = Util\Common::getLastVersion(__DIR__."/../../fixtures/files_struct/first/sample-*.txt");
+        $this->assertEquals(3, $lastVer);
+    }
+
+    function testGetLastVersionSec()
+    {
+        $lastVer = Util\Common::getLastVersion(__DIR__."/../../fixtures/files_struct/second/sample-*.txt");
+
+        $this->assertEquals(5, $lastVer);
+    }
+
+    /**
+     * Negative test, no matched files found
+     */
+    function testGetLastVersionThr()
+    {
+        $lastVer = Util\Common::getLastVersion(sys_get_temp_dir()."/sample-*.txt");
+
+        $this->assertEquals(0, $lastVer);
+    }
+}