Add unit test for helper custom file

Author: kylekatarnls

phpunit.xml

@@ -23,7 +23,7 @@
             <file>tests/options.php</file>
         </testsuite>
         <testsuite name="helpers">
-            <file>tests/dotHelper.php</file>
+            <file>tests/helpers.php</file>
         </testsuite>
         <testsuite name="badSyntaxes">
             <file>tests/badSyntaxes.php</file>

tests/Plus.h

@@ -1,6 +1,6 @@
 function ($base) {
     foreach (array_slice(func_get_args(), 1) as $value) {
-        $base = $base * $value;
+        $base = $base - $value;
     }
 
     return $base;

tests/dotHelper.php renamed to tests/helpers.php

@@ -215,4 +215,16 @@ public function testDotObjectHelper()
             'a' => new MagicGetterWithNoIsset(),
         )));
     }
+
+    public function testHelperFile()
+    {
+        $jsPhpize = new JsPhpize(array(
+            'helpers' => array(
+                'plus' => __DIR__ . '/Plus.h',
+            ),
+            'returnLastStatement' => true,
+        ));
+
+        $this->assertEquals(6, $jsPhpize->render('13 + 7'));
+    }
 }