add common TestCase class

composer.json

@@ -19,6 +19,9 @@
 	"autoload": {
 		"classmap": ["lib/"]
 	},
+	"autoload-dev": {
+		"classmap": ["tests/TestCase.php"]
+	},
 	"require": {
 		"ext-pcre": "*",
 		"firephp/firephp-core": "~0.4.0",

tests/JSMinTest.php

@@ -2,16 +2,8 @@
 
 use JSMin\JSMin;
 
-class JsMinTest extends PHPUnit_Framework_TestCase
+class JsMinTest extends TestCase
 {
-    /** @var string */
-    static $test_files;
-
-    public static function setupBeforeClass()
-    {
-        self::$test_files = __DIR__ . '/../min_unit_tests/_test_files';
-    }
-
     public function test1()
     {
         $src = file_get_contents(self::$test_files . '/js/before.js');

tests/TestCase.php

@@ -0,0 +1,12 @@
+<?php
+
+class TestCase extends PHPUnit_Framework_TestCase
+{
+    /** @var string */
+    protected static $test_files;
+
+    public static function setupBeforeClass()
+    {
+        self::$test_files = __DIR__ . '/../min_unit_tests/_test_files';
+    }
+}