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+--TEST--
+XMLReader: libxml2 XML Reader, Move cursor to an attribute, with invalid arguments
+--CREDITS--
+Mark Baker mark@lange.demon.co.uk at the PHPNW2017 Conference for PHP Testfest 2017
+--SKIPIF--
+<?php if (!extension_loaded("xmlreader")) print "skip"; ?>
+--FILE--
+<?php
+// Set up test data in a new file
+$xmlstring = '<?xml version="1.0" encoding="UTF-8"?>
+<books><book num="1" idx="2">book1</book></books>';
+$filename = dirname(__FILE__) . '/_014.xml';
+file_put_contents($filename, $xmlstring);
+
+// Load test data into a new XML Reader
+$reader = new XMLReader();
+if (!$reader->open($filename)) {
+ exit('XML could not be read');
+}
+
+// Parse the data
+while ($reader->read()) {
+ if ($reader->nodeType != XMLREADER::END_ELEMENT) {
+ // Find the book node
+ if ($reader->nodeType == XMLREADER::ELEMENT && $reader->name == 'book') {
+ echo $reader->name . "\n";
+
+ $attr = $reader->moveToNextAttribute();
+ var_dump($attr);
+ echo $reader->name . ": ";
+ echo $reader->value . "\n";
+
+ // Test for call with an empty string argument
+ $attr = $reader->moveToAttribute('');
+ var_dump($attr);
+ // Ensure that node pointer has not changed position
+ echo $reader->name . ": ";
+ echo $reader->value . "\n";
+
+ // Test for call by name for an attribute that doesn't exist
+ $attr = $reader->moveToAttribute('isbn');
+ var_dump($attr);
+ // Ensure that node pointer has not changed position
+ echo $reader->name . ": ";
+ echo $reader->value . "\n";
+
+ // Test for call by number for an attribute that doesn't exist
+ $attr = $reader->moveToAttributeNo(911);
+ var_dump($attr);
+ // Oddly, node pointer moves back to the element in this case
+ echo $reader->name . "\n";
+ }
+ }
+}
+
+// clean up
+$reader->close();
+?>
+===DONE===
+--CLEAN--
+<?php
+unlink(__DIR__.'/_014.xml');
+?>
+--EXPECTF--
+book
+bool(true)
+num: 1
+
+Warning: XMLReader::moveToAttribute(): Attribute Name is required in %s on line %d
+bool(false)
+num: 1
+bool(false)
+num: 1
+bool(false)
+book
+===DONE===