public function testConditionIsEmpty() { $condition = new Conditions\NullCondition(); $this->assertTrue($condition->isEmpty()); $condition = (new Conditions\NullCondition())->and(new Conditions\Equal(new Types\Integer('response'), 42)); $this->assertFalse($condition->isEmpty()); $condition = (new Conditions\Equal(new Types\Integer('response'), 42))->and(new Conditions\NullCondition()); $this->assertFalse($condition->isEmpty()); }