Skip FormatConverterTest::testPHPDefaultFormat on HHVM.

tests/framework/helpers/FormatConverterTest.php

@@ -40,6 +40,11 @@ class FormatConverterTest extends TestCase
      */
     public function testPHPDefaultFormat()
     {
+
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('Can not test on HHVM because HHVM returns inconsistend with PHP date format patterns.');
+        }
+
         foreach (FormatConverter::$phpFallbackDatePatterns as $format => $formats) {
             foreach ($formats as $name => $expected) {
                 $expected = FormatConverter::convertDatePhpToIcu($expected);
@@ -81,13 +86,7 @@ class FormatConverterTest extends TestCase
                         break;
                 }
 
-                $pattern = $fmt->getPattern();
-
-                if (defined('HHVM_VERSION') && $format === 'short') {
-                    $pattern = str_replace(',', '', $pattern); // Remove comma between date and time ('M/d/yy, h:mm a')
-                }
-
-                $this->assertEquals($expected, $pattern, "Format for $format $name does not match.");
+                $this->assertEquals($expected, $fmt->getPattern(), "Format for $format $name does not match.");
             }
         }
     }