LJQQIL

assignment/app/src/test/java/org/example/WalrusTest.java

@@ -1,12 +1,88 @@
-/*
- * This source file was generated by the Gradle 'init' task
- */
 package org.example;
 
+import org.example.values.Walrus; 
+import org.example.values.CannedWalrusFood;
+import org.example.values.WalrusFood;
 import org.junit.Test;
 import static org.junit.Assert.*;
 
 public class WalrusTest {
-    @Test public void appHasAGreeting() {
+
+    @Test
+    public void testWalrusCanEat() {
+
+        Walrus walrus = new Walrus();
+        FeedsWalrus feeder = new FeedsWalrus();
+
+        // number how many times to feed the Walrus.
+        final int feedCount = 10_000;
+
+        for (int i = 0; i < feedCount; i++) {
+            WalrusFood food = new WalrusFood();
+            CannedWalrusFood cannedFood = new CannedWalrusFood(food);
+            feeder.feed(walrus, cannedFood);
+
+            assertTrue("Walrus did not eat food at iteration " + i, 
+                       walrus.hasEaten(food));
+        }
+
+        System.out.println("The Walrus successfully ate " + feedCount + " items.");
+    }
+
+    @Test
+    public void testWalrusGetsRightFood() {
+
+        Walrus walrus = new Walrus();
+        WalrusFood expectedFood = new WalrusFood();
+        CannedWalrusFood can = new CannedWalrusFood(expectedFood);
+        FeedsWalrus feeder = new FeedsWalrus();
+
+        // Feed the walrus.
+        feeder.feed(walrus, can);
+
+        assertTrue("The walrus did not receive the correct food.", 
+                   walrus.hasEaten(expectedFood));
+    }
+
+    @Test
+    public void testOpenCanReturnsFood() {
+
+        WalrusFood expectedFood = new WalrusFood();
+        CannedWalrusFood can = new CannedWalrusFood(expectedFood);
+        OpensCan canOpener = new OpensCan();
+
+        WalrusFood actualFood = canOpener.open(can);
+
+        assertSame("Expected to get the same WalrusFood from the can", expectedFood, actualFood);
+    }
+
+    @Test
+    public void testWalrusEatsFood() {
+
+        Walrus walrus = new Walrus();
+        WalrusFood food = new WalrusFood();
+        CannedWalrusFood cannedFood = new CannedWalrusFood(food);
+        FeedsWalrus feeder = new FeedsWalrus();
+
+        feeder.feed(walrus, cannedFood);
+
+        assertTrue("Walrus should have eaten the food", walrus.hasEaten(food));
     }
+
+    @Test(expected = ClassCastException.class)
+    public void testWalrusRejectsNonWalrusFood() {
+        Walrus walrus = new Walrus();
+        FeedsWalrus feeder = new FeedsWalrus();
+
+        CannedWalrusFood badCan = new CannedWalrusFood(new WalrusFood()) {
+            @Override
+            public WalrusFood extractContents() {
+
+                return (WalrusFood)(Object) "Not a WalrusFood";
+            }
+        };
+
+        feeder.feed(walrus, badCan);
+    }
+
 }