Conjured items test

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

@@ -0,0 +1,50 @@
+package com.gildedrose;
+
+import io.qameta.allure.Feature;
+import lombok.val;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static com.gildedrose.TestHelper.assertItem;
+import static com.gildedrose.TestHelper.prepareApp;
+import static java.lang.Math.max;
+import static org.apache.commons.lang3.RandomUtils.nextInt;
+
+
+class GildedRoseConjuredTest {
+
+    private static final String NAME = "Conjured Mana Cake";
+
+    @Feature("The Quality of an item is never more than 50")
+    @ParameterizedTest(name = "Initial quality: {arguments}")
+    @ValueSource(ints = {49, 50})
+    void shouldNotIncreaseQualityAbove50(int initialQuality) {
+        // given
+        val initialSellIn = nextInt(3, 50);
+        GildedRose app = prepareApp(new Item(NAME, initialSellIn, initialQuality));
+
+        // when
+        app.updateQuality();
+
+        // then
+        final Item item = app.items[0];
+        assertItem(item, "Aged Brie", initialSellIn - 1, 50);
+    }
+
+    @Feature("\"Conjured\" items degrade in Quality twice as fast as normal items")
+    @Feature("The Quality of an item is never negative")
+    @ParameterizedTest(name = "Initial quality: {arguments}")
+    @ValueSource(ints = {0, 1, 2, 3, 49, 50})
+    void shouldDegradeInQualityTwiceFast(int initialQuality) {
+        // given
+        GildedRose app = prepareApp(new Item("Aged Brie", 1, initialQuality));
+
+        // when
+        app.updateQuality();
+
+        // then
+        final Item item = app.items[0];
+        final int expectedQuality = max(initialQuality - 2, 0);
+        assertItem(item, "Aged Brie", 0, expectedQuality);
+    }
+}