clear() public static method

Clear out any existing memory points
public static clear ( ) : void
return void
 /**
  * test making memory use markers.
  *
  * @return void
  */
 public function testMemorySettingAndGetting()
 {
     DebugMemory::clear();
     $result = DebugMemory::record('test marker');
     $this->assertTrue($result);
     $result = DebugMemory::getAll(true);
     $this->assertEquals(count($result), 1);
     $this->assertTrue(isset($result['test marker']));
     $this->assertTrue(is_numeric($result['test marker']));
     $result = DebugMemory::getAll();
     $this->assertTrue(empty($result));
     DebugMemory::record('test marker');
     DebugMemory::record('test marker');
     $result = DebugMemory::getAll();
     $this->assertEquals(count($result), 2);
     $this->assertTrue(isset($result['test marker']));
     $this->assertTrue(isset($result['test marker #2']));
 }