port MinifyBuildTest to phpunit

tests/MinifyCommentPreserverTest.php

@@ -0,0 +1,30 @@
+<?php
+
+class MinifyBuildTest extends TestCase
+{
+    public function test()
+    {
+        $inOut = array(
+            '/*!*/' => "\n/*!*/\n",
+            '/*!*/a' => "\n/*!*/\n1A",
+            'a/*!*//*!*/b' => "2A\n/*!*/\n\n/*!*/\n3B",
+            'a/*!*/b/*!*/' => "4A\n/*!*/\n5B\n/*!*/\n",
+        );
+
+        $processor = array(__CLASS__, '_test_MCP_processor');
+        foreach ($inOut as $in => $expected) {
+            $actual = Minify_CommentPreserver::process($in, $processor);
+            $this->assertSame($expected, $actual, 'Minify_CommentPreserver');
+        }
+    }
+
+    /**
+     * @internal
+     */
+    public static function _test_MCP_processor($content, $options = array())
+    {
+        static $callCount = 0;
+        ++$callCount;
+        return $callCount . strtoupper($content);
+    }
+}