Specifing "value" is now optional when serializing arrays.

CHANGELOG.md

@@ -8,6 +8,8 @@ ChangeLog
   `Sabre\Xml\Service::expect()`.
 * Moved some parsing logic to `Reader::getDeserializerForElementName()`,
   so people with more advanced use-cases can implement their own logic there.
+* When serializing elements using arrays, the `value` key in the array is now
+  optional.
 
 
 1.2.0 (2015-08-30)

lib/Writer.php

@@ -112,13 +112,13 @@ function write($value) {
                 if (is_int($name)) {
 
                     // This item has a numeric index. We expect to be an array with a name and a value.
-                    if (!is_array($item) || !array_key_exists('name', $item) || !array_key_exists('value', $item)) {
-                        throw new InvalidArgumentException('When passing an array to ->write with numeric indices, every item must be an array containing the "name" and "value" key');
+                    if (!is_array($item) || !array_key_exists('name', $item)) {
+                        throw new InvalidArgumentException('When passing an array to ->write with numeric indices, every item must be an array containing at least the "name" key');
                     }
 
                     $attributes = isset($item['attributes']) ? $item['attributes'] : [];
                     $name = $item['name'];
-                    $item = $item['value'];
+                    $item = isset($item['value']) ? $item['value'] : [];
 
                 } elseif (is_array($item) && array_key_exists('value', $item)) {
 

tests/Sabre/Xml/WriterTest.php

@@ -72,7 +72,6 @@ function testSimpleAttributes() {
         );
 
     }
-
     function testMixedSyntax() {
         $this->compare([
             '{http://sabredav.org/ns}root' => [
@@ -148,6 +147,31 @@ function testArrayFormat2() {
  <s:elem1 attr1="attribute value">text</s:elem1>
 </s:root>
 
+HI
+        );
+
+    }
+
+    /**
+     * @depends testArrayFormat2
+     */
+    function testArrayFormat2NoValue() {
+
+        $this->compare([
+            '{http://sabredav.org/ns}root' => [
+                [
+                    'name'       => '{http://sabredav.org/ns}elem1',
+                    'attributes' => [
+                        'attr1' => 'attribute value',
+                    ],
+                ],
+            ],
+        ], <<<HI
+<?xml version="1.0"?>
+<s:root xmlns:s="http://sabredav.org/ns">
+ <s:elem1 attr1="attribute value"/>
+</s:root>
+
 HI
         );