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refactor: introduce ShoppingCart model and use it in ShoppingCartService
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52 changes: 52 additions & 0 deletions
52
src/main/java/io/github/akadir/casestudy/shopping/service/model/ShoppingCart.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,52 @@ | ||
| package io.github.akadir.casestudy.shopping.service.model; | ||
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| import io.github.akadir.casestudy.discount.campaign.base.Campaign; | ||
| import io.github.akadir.casestudy.discount.coupon.base.Coupon; | ||
| import io.github.akadir.casestudy.product.model.Product; | ||
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| import java.util.HashMap; | ||
| import java.util.Map; | ||
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| public class ShoppingCart { | ||
| private final Map<Product, Integer> products; | ||
| private Coupon appliedCoupon; | ||
| private Campaign appliedCampaign; | ||
| private double discount; | ||
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| public ShoppingCart() { | ||
| this.products = new HashMap<>(); | ||
| } | ||
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| public Map<Product, Integer> getProducts() { | ||
| return products; | ||
| } | ||
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| public Coupon getAppliedCoupon() { | ||
| return appliedCoupon; | ||
| } | ||
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| public void setAppliedCoupon(Coupon appliedCoupon) { | ||
| this.appliedCoupon = appliedCoupon; | ||
| } | ||
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| public Campaign getAppliedCampaign() { | ||
| return appliedCampaign; | ||
| } | ||
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| public void setAppliedCampaign(Campaign appliedCampaign) { | ||
| this.appliedCampaign = appliedCampaign; | ||
| } | ||
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| public double getDiscount() { | ||
| return discount; | ||
| } | ||
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| public void setDiscount(double discount) { | ||
| this.discount = discount; | ||
| } | ||
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| public double getCartPrice() { | ||
| return products.entrySet().stream() | ||
| .mapToDouble(e -> e.getKey().getPrice() * e.getValue()).sum(); | ||
| } | ||
| } |
67 changes: 67 additions & 0 deletions
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src/test/java/io/github/akadir/casestudy/shopping/model/ShoppingCartTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,67 @@ | ||
| package io.github.akadir.casestudy.shopping.model; | ||
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| import io.github.akadir.casestudy.product.model.Category; | ||
| import io.github.akadir.casestudy.product.model.Product; | ||
| import io.github.akadir.casestudy.shopping.service.model.ShoppingCart; | ||
| import org.junit.Test; | ||
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| import static org.assertj.core.api.Assertions.assertThat; | ||
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| public class ShoppingCartTest { | ||
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| @Test | ||
| public void whenShoppingCartCreatedThenExpectProductsInitializedAndDiscountsEmpty() { | ||
| ShoppingCart shoppingCart = new ShoppingCart(); | ||
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| assertThat(shoppingCart.getProducts()) | ||
| .as("Shopping cart's products should be empty") | ||
| .isEmpty(); | ||
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| assertThat(shoppingCart.getAppliedCampaign()) | ||
| .as("Applied campaign should be null") | ||
| .isNull(); | ||
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| assertThat(shoppingCart.getAppliedCoupon()) | ||
| .as("Applied coupon should be null") | ||
| .isNull(); | ||
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| assertThat(shoppingCart.getCartPrice()) | ||
| .as("Cart price should be zero") | ||
| .isZero(); | ||
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| assertThat(shoppingCart.getDiscount()) | ||
| .as("Cart discount should be zero") | ||
| .isZero(); | ||
| } | ||
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| @Test | ||
| public void whenProductAddedToShoppingCartThenExpectProductsIsNotEmptyAndPriceIncreased() { | ||
| ShoppingCart shoppingCart = new ShoppingCart(); | ||
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| Product foo = new Product("foo", 10, new Category("bar")); | ||
| int amount = 1; | ||
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| shoppingCart.getProducts().put(foo, amount); | ||
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| assertThat(shoppingCart.getProducts()) | ||
| .as("Shopping cart's products size should be " + amount) | ||
| .hasSize(amount); | ||
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| assertThat(shoppingCart.getAppliedCampaign()) | ||
| .as("Applied campaign should be null") | ||
| .isNull(); | ||
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| assertThat(shoppingCart.getAppliedCoupon()) | ||
| .as("Applied coupon should be null") | ||
| .isNull(); | ||
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| assertThat(shoppingCart.getCartPrice()) | ||
| .as("Cart price should be same as product price times amount: " + foo.getPrice() * amount) | ||
| .isEqualTo(foo.getPrice() * amount); | ||
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| assertThat(shoppingCart.getDiscount()) | ||
| .as("Cart discount should be zero") | ||
| .isZero(); | ||
| } | ||
| } |