pruebas.patch

diff --git a/build.gradle b/build.gradle
index b5605b8..cecc2c6 100644
--- a/build.gradle
+++ b/build.gradle
@@ -33,6 +33,7 @@ repositories {
 
 dependencies {
     annotationProcessor("org.seasar.doma:doma-processor:${dependentVersion}")
+    implementation 'org.springframework.boot:spring-boot-starter-validation:2.3.0.RC1'
     implementation("org.springframework.boot:spring-boot-starter-thymeleaf")
     implementation("org.springframework.boot:spring-boot-starter-web")
     implementation("org.springframework.boot:spring-boot-starter-jdbc")
@@ -42,9 +43,22 @@ dependencies {
     implementation("com.h2database:h2")
     implementation("org.webjars:jquery:2.1.1")
     compileOnly("org.springframework.boot:spring-boot-devtools")
-    testImplementation("junit:junit")
+    
+    testImplementation 'org.springframework.boot:spring-boot-starter-test:2.3.0.RC1'
+    testImplementation 'org.junit.jupiter:junit-jupiter-engine:5.6.2'
+    testImplementation 'org.mockito:mockito-junit-jupiter:3.3.3'
+
+    //Agregado esto para poder usar JUnit3-4 y probar con el framework de JUnit5
+    testRuntimeOnly 'org.junit.jupiter:junit-jupiter-engine'
+    testCompileOnly 'junit:junit:4.13'
+    testRuntimeOnly 'org.junit.vintage:junit-vintage-engine'
+}
+
+test {
+    useJUnitPlatform()
 }
 
+
 eclipse {
     classpath {
         file {
diff --git a/src/test/java/model/CartTest.java b/src/test/java/model/CartTest.java
new file mode 100644
index 0000000..f0e3254
--- /dev/null
+++ b/src/test/java/model/CartTest.java
@@ -0,0 +1,55 @@
+package test.java.model;
+
+
+import org.junit.jupiter.api.Test;
+import org.springframework.context.i18n.LocaleContextHolder;
+import org.springframework.validation.beanvalidation.LocalValidatorFactoryBean;
+
+import javax.validation.ConstraintViolation;
+import javax.validation.Validator;
+import java.util.Locale;
+
+import sample.model.Cart;
+import sample.model.CartItem;
+import sample.entity.Item;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class ShoppingCartTest {
+
+	private Validator createValidator() {
+		LocalValidatorFactoryBean localValidatorFactoryBean = new LocalValidatorFactoryBean();
+		localValidatorFactoryBean.afterPropertiesSet();
+		return localValidatorFactoryBean;
+    }
+    
+    @Test
+    public void addOneItem() {
+        LocaleContextHolder.setLocale(Locale.ENGLISH);
+        
+        Cart c = new Cart();
+        assertThat(c.getNumberOfItems()).isEqualTo(0);
+        assertThat(c.isEmpty()).isTrue();
+
+        Item i = new Item();
+        i.setItemId("1");
+        i.setProductId("1");
+        i.setQuantity(3);
+        i.setProductName("Producto 1");
+
+        c.addItem(i, true);
+        assertThat(c.getNumberOfItems()).isEqualTo(1);
+        assertThat(c.isEmpty()).isFalse();
+
+        CartItem ci = c.getCartItem("1");
+        assertThat(ci).isNotNull();
+        assertThat(ci.getQuantity()).isEqualTo(1);
+        assertThat(ci.isInStock()).isTrue();
+
+        Item i1 = ci.getItem();
+        assertThat(i1.getQuantity()).isEqualTo(3);
+        assertThat(i1.getProductId()).isEqualTo("1");
+
+    }
+
+}
\ No newline at end of file