WIP: Once the sell by date has passed, Quality degrades twice as fast

Java/pom.xml

@@ -18,9 +18,23 @@
         <aspectj.version>1.9.4</aspectj.version>
         <assertj.version>3.11.1</assertj.version>
         <junit.jupiter.version>5.4.2</junit.jupiter.version>
+        <lombok.version>1.18.8</lombok.version>
+        <commons-lang3.version>3.8.1</commons-lang3.version>
     </properties>
 
     <dependencies>
+        <dependency>
+            <groupId>org.apache.commons</groupId>
+            <artifactId>commons-lang3</artifactId>
+            <version>${commons-lang3.version}</version>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.projectlombok</groupId>
+            <artifactId>lombok</artifactId>
+            <version>${lombok.version}</version>
+            <scope>provided</scope>
+        </dependency>
         <dependency>
             <groupId>org.assertj</groupId>
             <artifactId>assertj-core</artifactId>
@@ -74,9 +88,9 @@
                 </configuration>
                 <dependencies>
                     <dependency>
-                    <groupId>org.aspectj</groupId>
-                    <artifactId>aspectjweaver</artifactId>
-                    <version>${aspectj.version}</version>
+                        <groupId>org.aspectj</groupId>
+                        <artifactId>aspectjweaver</artifactId>
+                        <version>${aspectj.version}</version>
                     </dependency>
                 </dependencies>
             </plugin>

Java/src/test/java/com/gildedrose/GildedRoseTest.java

@@ -1,11 +1,15 @@
 package com.gildedrose;
 
 import io.qameta.allure.Feature;
+import lombok.val;
+import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.params.ParameterizedTest;
 import org.junit.jupiter.params.provider.ValueSource;
 
-import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+import static com.gildedrose.TestHelper.assertItem;
+import static com.gildedrose.TestHelper.prepareApp;
+import static org.apache.commons.lang3.RandomUtils.nextInt;
 
 
 class GildedRoseTest {
@@ -24,8 +28,8 @@ class GildedRoseTest {
     }
 
     @Feature("The Quality of an item is never negative")
-    @ParameterizedTest(name="Initial quality: {arguments}")
-    @ValueSource(ints={0,1})
+    @ParameterizedTest(name = "Initial quality: {arguments}")
+    @ValueSource(ints = {0, 1})
     void shouldTheQualityNeverBeNegative(int initialQuality) {
         // given
         GildedRose app = prepareApp(new Item("foo", 0, initialQuality));
@@ -38,16 +42,19 @@ class GildedRoseTest {
         assertItem(item, "foo", 0, -1);
     }
 
-    private void assertItem(Item item, String expectedName, int expectedQuality, int expectedSellIn) {
-        assertThat(item).as("item").isNotNull();
-        assertThat(item.name).as("name").isEqualTo(expectedName);
-        assertThat(item.quality).as("quality").isEqualTo(expectedQuality);
-        assertThat(item.sellIn).as("sellIn").isEqualTo(expectedSellIn);
+    @Feature("Once the sell by date has passed, Quality degrades twice as fast")
+    @ParameterizedTest(name = "sellIn: {arguments}")
+    @ValueSource(ints = {0, 1})
+    void shouldTheDegradeQualityFasterOnceSellDateIsPassed(int sellIn) {
+        // given
+        val initialQuality = nextInt(3, 50);
+        GildedRose app = prepareApp(new Item("foo", sellIn, initialQuality));
+
+        // when
+        app.updateQuality();
+
+        // then
+        final Item item = app.items[0];
+        assertItem(item, "foo", initialQuality - 2, -2);
     }
-
-    private static GildedRose prepareApp(Item... items) {
-        return new GildedRose(items);
-    }
-
-
 }

Java/src/test/java/com/gildedrose/TestHelper.java

@@ -0,0 +1,19 @@
+package com.gildedrose;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+public final class TestHelper {
+
+    private TestHelper(){}
+
+    static GildedRose prepareApp(Item... items) {
+        return new GildedRose(items);
+    }
+
+    static void assertItem(Item item, String expectedName, int expectedQuality, int expectedSellIn) {
+        assertThat(item).as("item").isNotNull();
+        assertThat(item.name).as("name").isEqualTo(expectedName);
+        assertThat(item.quality).as("quality").isEqualTo(expectedQuality);
+        assertThat(item.sellIn).as("sellIn").isEqualTo(expectedSellIn);
+    }
+}