PHPUnit_Framework_Assert::assertNotFalse PHP Method

    public static function assertNotFalse($condition, $message = '')
    {
        static::assertThat($condition, static::logicalNot(static::isFalse()), $message);
    }

 public function toBeFalse()
 {
     if ($this->negate) {
         a::assertNotFalse($this->actual);
     } else {
         a::assertFalse($this->actual);
     }
 }