function test_is_free_shipping() { $coupon = new WPSC_Coupon(self::FREE_SHIPPING_COUPON_ID); $free_shipping = $coupon->is_free_shipping(); $this->assertTrue($free_shipping); $coupon = new WPSC_Coupon(self::PERCENTAGE_COUPON_ID); $free_shipping = $coupon->is_free_shipping(); $this->assertFalse($free_shipping); }