User Guide Behavior Driven Design Library

@ExtendWith(StoryExtension.class)
@Story(value = "Return go back to the stockpile", description = "As a store owner, in order to keep track of stock, I want to add items back to stock when they're returned.")
public class StoreTestStoryOne {
    @Scenario("Refunded items from the customer should be returned to stock")
    public void refundAndRestock(Scene scene) {
        scene.given("that a customer previously bought a black sweater from me",
                t -> t.put("store", new Store(0, 4).buyBlack(1))).
            and("I have three black sweaters in stock",
                t -> assertEquals(3, t.<Store>get("store").blacks(),
                "Store should carry 3 black sweaters")).

            when("the customer returns the black sweater for a refund",
                t -> t.<Store>get("store").refundBlack(1)).

            then("I should have four black sweaters in stock",
                t -> assertEquals(4, t.<Store>get("store").blacks(),
                "Store should carry 4 black sweaters")).
            run();
    }

    @Scenario("Replaced items should be returned to stock")
    public void replaceAndRestock(Scene scene) {
        scene.given("that a customer previously bought a blue garment from me",
                t -> t.put("store", new Store(3, 3).buyBlue(1))).
            and("I have two blue garments in stock",
                t -> assertEquals(2, t.<Store>get("store").blues(),
                "Store should carry 2 blue garments")).
            and("three black garments in stock",
                t -> assertEquals(3, t.<Store>get("store").blacks(),
                "Store should carry 3 black garments")).

            when("she returns the blue garment for a replacement in black",
                t -> t.<Store>get("store").refundBlue(1).buyBlack(1)).

            then("I should have three blue garments in stock",
                t -> assertEquals(3, t.<Store>get("store").blues(),
                "Store should carry 3 blue garments")).
            and("two black garments in stock",
                t -> assertEquals(2, t.<Store>get("store").blacks(),
                "Store should carry 2 black garments")).
                run();
    }
}