Move Set::check across.

lib/Cake/Test/Case/Utility/Set2Test.php

@@ -1046,4 +1046,32 @@ class Set2Test extends CakeTestCase {
 		$this->assertFalse(isset($result[0]['Article']['body']));
 	}
 
+/**
+ * testCheck method
+ *
+ * @return void
+ */
+	public function testCheck() {
+		$set = array(
+			'My Index 1' => array('First' => 'The first item')
+		);
+		$this->assertTrue(Set2::check($set, 'My Index 1.First'));
+		$this->assertTrue(Set2::check($set, 'My Index 1'));
+
+		$set = array(
+			'My Index 1' => array(
+				'First' => array(
+					'Second' => array(
+						'Third' => array(
+							'Fourth' => 'Heavy. Nesting.'
+						)
+					)
+				)
+			)
+		);
+		$this->assertTrue(Set2::check($set, 'My Index 1.First.Second'));
+		$this->assertTrue(Set2::check($set, 'My Index 1.First.Second.Third'));
+		$this->assertTrue(Set2::check($set, 'My Index 1.First.Second.Third.Fourth'));
+		$this->assertFalse(Set2::check($set, 'My Index 1.First.Seconds.Third.Fourth'));
+	}
 }

lib/Cake/Utility/Set2.php

@@ -350,8 +350,24 @@ class Set2 {
 		return true;
 	}
 
+/**
+ * Test whether or not a given path exists in $data.
+ * This method uses the same path syntax as Set2::extract()
+ *
+ * Checking for paths that could target more than one element will
+ * make sure that at least one matching element exists.
+ *
+ * @param array $data The data to check.
+ * @param string $path The path to check for.
+ * @return boolean Existence of path.
+ * @see Set2::extract()
+ */
 	public static function check(array $data, $path) {
-
+		$results = self::extract($data, $path);
+		if (!is_array($results)) {
+			return false;
+		}
+		return count($results) > 0;
 	}
 
 /**