Fix: allow explicit 0 secfracs in datetime format

Author: vaeryn-uk

src/JsonSchema/Constraints/FormatConstraint.php

@@ -138,7 +138,7 @@ protected function validateDateTime($datetime, $format)
         // which will fail the above string comparison because the passed
         // $datetime may be '2000-05-01T12:12:12.123Z' but format() will return
         // '2000-05-01T12:12:12.123000Z'
-        if ((strpos('u', $format) !== -1) && (intval($dt->format('u')) > 0)) {
+        if ((strpos('u', $format) !== -1) && (preg_match('/\.\d+Z/', $datetime))) {
             return true;
         }
 

tests/JsonSchema/Tests/Constraints/FormatTest.php

@@ -81,6 +81,10 @@ public function getValidFormats()
             array('2000-05-01T12:12:12+01:00', 'date-time'),
             array('2000-05-01T12:12:12.123456Z', 'date-time'),
             array('2000-05-01T12:12:12.123Z', 'date-time'),
+            array('2000-05-01T12:12:12.123000Z', 'date-time'),
+            array('2000-05-01T12:12:12.0Z', 'date-time'),
+            array('2000-05-01T12:12:12.000Z', 'date-time'),
+            array('2000-05-01T12:12:12.000000Z', 'date-time'),
 
             array('0', 'utc-millisec'),
 
@@ -140,6 +144,7 @@ public function getInvalidFormats()
             array('1999-1-11T00:00:00Z', 'date-time'),
             array('1999-01-11T00:00:00+100', 'date-time'),
             array('1999-01-11T00:00:00+1:00', 'date-time'),
+            array('1999.000Z-01-11T00:00:00+1:00', 'date-time'),
 
             array('-1', 'utc-millisec'),
             array(PHP_INT_MAX, 'utc-millisec'),