test scssphp functionality

tested cache dependencies

tests/ScssSourceTest.php

@@ -0,0 +1,40 @@
+<?php
+
+class ScssSourceTest extends TestCase
+{
+    public function setUp()
+    {
+        $this->realDocRoot = $_SERVER['DOCUMENT_ROOT'];
+        $_SERVER['DOCUMENT_ROOT'] = self::$document_root;
+    }
+
+    /**
+     * @link https://github.com/mrclay/minify/issues/500
+     */
+    public function testTimestamp()
+    {
+        $baseDir = self::$test_files;
+
+        $mainLess = "$baseDir/main.scss";
+        $includedLess = "$baseDir/_included.scss";
+
+        // touch timestamp with 1s difference
+        touch($mainLess);
+        sleep(1);
+        touch($includedLess);
+
+        $mtime1 = filemtime($mainLess);
+        var_dump($mtime1);
+        $mtime2 = filemtime($includedLess);
+        var_dump($mtime2);
+
+        $max = max($mtime1, $mtime2);
+
+        $options = array(
+            'groupsConfigFile' => "$baseDir/htmlHelper_groupsConfig.php",
+        );
+        $res = Minify_HTML_Helper::getUri('scss', $options);
+
+        $this->assertEquals("/min/g=scss&amp;{$max}", $res);
+    }
+}