giuseppelopes · GabrielNNS · Oct 24, 2025
diff --git a/verificar-limite/Product.java b/verificar-limite/Product.java
@@ -0,0 +1,28 @@
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+public class Product {
+    private String name;
+    private BigDecimal price;
+
+    public Product(String name, BigDecimal price) {
+        this.name = name;
+        this.price = price.setScale(2, RoundingMode.HALF_UP);
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public BigDecimal getPrice() {
+        return price;
+    }
+
+    @Override
+    public String toString() {
+        return "Product{" +
+                "name='" + name + '\'' +
+                ", price=" + price +
+                '}';
+    }
+}
diff --git a/verificar-limite/ShoppingList.java b/verificar-limite/ShoppingList.java
@@ -0,0 +1,62 @@
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+import java.util.ArrayList;
+import java.util.List;
+
+public class ShoppingList {
+    private BigDecimal purchaseLimit;
+    private List<Product> productList;
+
+    public ShoppingList(BigDecimal purchaseLimit) {
+        if(purchaseLimit.equals(new BigDecimal(0))) throw new IllegalArgumentException("Purchase Limit is zero or negative!");
+        this.purchaseLimit = purchaseLimit.setScale(2, RoundingMode.HALF_UP);
+        this.productList = new ArrayList<>();
+    }
+
+    public BigDecimal getPurchaseLimit() {
+        return this.purchaseLimit;
+    }
+
+    public List<Product> getProductList() {
+        return this.productList;
+    }
+
+    public BigDecimal getTotalPriceProductList() {
+        BigDecimal totalPurchase = new BigDecimal(0);
+        for(Product p : productList) {
+            totalPurchase = totalPurchase.add(p.getPrice());
+        }
+        return totalPurchase;
+    }
+
+    public void addLimit(BigDecimal value) {
+        if(value.longValue() < BigDecimal.valueOf(0).longValue()) throw new IllegalArgumentException("Purchase Limit add negative!");
+        purchaseLimit = purchaseLimit.add(value).setScale(2, RoundingMode.HALF_UP);
+    }
+
+    private void discountLimit(BigDecimal value) {
+        purchaseLimit = purchaseLimit.subtract(value);
+    }
+
+    public void addProduct(Product product) {
+        if(product == null) throw new IllegalArgumentException("Product is null!");
+        productList.add(product);
+    }
+
+    public void removeProduct(Product product) {
+        if(!productList.remove(product)) throw new IllegalArgumentException("Product non exists!");
+    }
+
+    public Boolean finishPurchase() {
+        BigDecimal totalPurchase = getTotalPriceProductList();
+        if(purchaseLimit.longValue() < totalPurchase.longValue()) throw new RuntimeException("Insufficient purchase limit!");
+        this.productList.clear();
+        discountLimit(totalPurchase);
+        return true;
+    }
+
+    public String getReport() {
+        return "PurchaceLimit: " + getPurchaseLimit()
+                + " | Products: " + getProductList();
+    }
+}
diff --git a/verificar-limite/ShoppingListTest.java b/verificar-limite/ShoppingListTest.java
@@ -0,0 +1,95 @@
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import java.math.BigDecimal;
+import java.math.RoundingMode;
+
+import static org.junit.jupiter.api.Assertions.*;
+
+public class ShoppingListTest {
+
+    private ShoppingList shoppingList;
+    private Product product;
+    private Product secondProduct;
+
+    private static final String NAME_PRODUCT = "Test";
+    private static final BigDecimal PRICE_PRODUCT = BigDecimal.valueOf(10);
+
+    @BeforeEach
+    public void setUp() {
+        shoppingList = new ShoppingList(BigDecimal.valueOf(30.00));
+        product = new Product(NAME_PRODUCT, PRICE_PRODUCT);
+        secondProduct = new Product(NAME_PRODUCT, PRICE_PRODUCT);
+    }
+
+    @Test
+    public void shouldAddLimitWhenValueIsValid() {
+        BigDecimal limitExpected = BigDecimal.valueOf(50.00).setScale(2, RoundingMode.HALF_UP);
+
+        shoppingList.addLimit(BigDecimal.valueOf(20));
+
+        assertEquals(limitExpected, shoppingList.getPurchaseLimit());
+    }
+
+    @Test
+    public void shouldAddProductsToProductListWhenValid() {
+        int sizeExpected = 2;
+
+        shoppingList.addProduct(product);
+        shoppingList.addProduct(secondProduct);
+
+        assertEquals(sizeExpected, shoppingList.getProductList().size());
+    }
+
+    @Test
+    public void shouldRemoveProductsToProductListWhenIndexValid() {
+        int sizeExpected = 1;
+
+        shoppingList.addProduct(product);
+        shoppingList.addProduct(secondProduct);
+
+        shoppingList.removeProduct(secondProduct);
+
+        assertEquals(sizeExpected, shoppingList.getProductList().size());
+        assertFalse(shoppingList.getProductList().contains(secondProduct));
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenAddLimitIsNegativeArgument() {
+        assertThrows(IllegalArgumentException.class, () -> shoppingList.addLimit(BigDecimal.valueOf(-1)));
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenAddProductNull() {
+        Product productNull = null;
+        assertThrows(IllegalArgumentException.class, () ->  shoppingList.addProduct(productNull));
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenRemoveProductNonExistentInProductList() {
+        Product productOffList = new Product(NAME_PRODUCT, PRICE_PRODUCT);
+        assertThrows(IllegalArgumentException.class, () ->  shoppingList.removeProduct(productOffList));
+    }
+
+    @Test
+    public void shouldThrowExceptionWhenFinishingPurchaseWithLimitInsufficient() {
+        Product productGreaterValue = new Product(NAME_PRODUCT, BigDecimal.valueOf(100));
+
+        shoppingList.addProduct(productGreaterValue);
+
+        assertThrows(RuntimeException.class, () ->  shoppingList.finishPurchase());
+    }
+
+    @Test
+    public void shouldFinishPurchaseWhenLimitAvailable() {
+        BigDecimal newLimitAvailable = BigDecimal.valueOf(10.00).setScale(2, RoundingMode.HALF_UP);
+
+        shoppingList.addProduct(product);
+        shoppingList.addProduct(secondProduct);
+
+        assertTrue(shoppingList.finishPurchase());
+        assertEquals(newLimitAvailable, shoppingList.getPurchaseLimit());
+        assertEquals(0, shoppingList.getProductList().size());
+
+    }
+}
diff --git a/verificar-limite/pom.xml b/verificar-limite/pom.xml
@@ -0,0 +1,43 @@
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
+                             https://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>com.gabriel</groupId>
+    <artifactId>verificar-limite</artifactId>
+    <version>1.0-SNAPSHOT</version>
+
+    <properties>
+        <maven.compiler.source>17</maven.compiler.source>
+        <maven.compiler.target>17</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <!-- JUnit 5 (Jupiter) -->
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <version>5.10.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <!-- Definindo seus diretórios personalizados -->
+        <sourceDirectory>${project.basedir}</sourceDirectory>
+        <testSourceDirectory>${project.basedir}</testSourceDirectory>
+
+        <plugins>
+            <!-- Plugin para rodar os testes -->
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-surefire-plugin</artifactId>
+                <version>3.2.5</version>
+                <configuration>
+                    <useModulePath>false</useModulePath>
+                </configuration>
+            </plugin>
+        </plugins>
+    </build>
+</project>