Add test for array_key_(first|last|index)

Author: jbafford

tests/basic/array_key_index.phpt

@@ -0,0 +1,135 @@
+--TEST--
+array_key_first, array_key_last, array_key_index
+--FILE--
+<?php
+
+function array_key_index_test(&$arr)
+{
+	foreach($arr as $v) break; //skip to second parameter
+	
+	$value = array('value has not been written to');
+	
+	$key = array_key_first($arr, $value);
+	var_dump($key);
+	var_dump($value);
+	echo current($arr) . "\n";
+	echo "\n";
+	
+	
+	$key = array_key_last($arr, $value);
+	var_dump($key);
+	var_dump($value);
+	echo current($arr) . "\n";
+	echo "\n";
+	
+	$key = array_key_index($arr, 1, $value);
+	
+	var_dump($key);
+	var_dump($value);
+	echo current($arr) . "\n";
+	echo "\n";
+	
+	$key = array_key_index($arr, -3, $value);
+	
+	var_dump($key);
+	var_dump($value);
+	echo current($arr) . "\n";
+	echo "\n";
+	
+	$key = array_key_index($arr, 3, $value);
+	var_dump($key);
+	var_dump($value);
+	echo current($arr) . "\n";
+	
+	echo "\n\n";
+}
+
+echo "test with string array\n";
+$arr = array(
+	'one' => 'first',
+	'two' => 'middle',
+	'three' => 'last',
+);
+array_key_index_test($arr);
+
+echo "test with numeric array\n";
+$arr = array(
+	1 => 'first',
+	2 => 'middle',
+	3 => 'last',
+);
+array_key_index_test($arr);
+
+echo "test with mixed array\n";
+$arr = array(
+	1 => 'first',
+	'second' => 'middle',
+	3 => 'last',
+);
+array_key_index_test($arr);
+?>
+--EXPECT--
+test with string array
+string(3) "one"
+string(5) "first"
+middle
+
+string(5) "three"
+string(4) "last"
+middle
+
+string(3) "two"
+string(6) "middle"
+middle
+
+string(3) "one"
+string(5) "first"
+middle
+
+NULL
+string(5) "first"
+middle
+
+
+test with numeric array
+int(1)
+string(5) "first"
+middle
+
+int(3)
+string(4) "last"
+middle
+
+int(2)
+string(6) "middle"
+middle
+
+int(1)
+string(5) "first"
+middle
+
+NULL
+string(5) "first"
+middle
+
+
+test with mixed array
+int(1)
+string(5) "first"
+middle
+
+int(3)
+string(4) "last"
+middle
+
+string(6) "second"
+string(6) "middle"
+middle
+
+int(1)
+string(5) "first"
+middle
+
+NULL
+string(5) "first"
+middle