public function testOrderTotal()
{
$rule = new OrderTotalRule();
// Equal
$rule->initialize('=', 100);
$this->assertTrue($rule->isValid($this->getSubject()));
$rule->val(20);
$this->assertFalse($rule->isValid($this->getSubject()));
// Greater than
$rule->op('>')->val(80);
$this->assertTrue($rule->isValid($this->getSubject()));
$rule->val(100);
$this->assertFalse($rule->isValid($this->getSubject()));
// Lesser than
$rule->op('<')->val(150);
$this->assertTrue($rule->isValid($this->getSubject()));
$rule->val(90);
$this->assertFalse($rule->isValid($this->getSubject()));
}