update

src/main/java/org/zipcoder/store/Cart.java

@@ -12,4 +12,13 @@ public class Cart {
     public long getId(){
         return this.id;
     }
+
+    public boolean equals(Cart c) {
+        return this.hashCode() == c.hashCode();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.id);
+    }
 }

src/main/java/org/zipcoder/store/ListMap.java

@@ -4,45 +4,67 @@ import java.util.ArrayList;
 import java.util.List;
 
 public class ListMap implements MyMap {
-    // instance field that is intialize to an ArrayList
+    // instance field that is initialize to an ArrayList
     private List<Entry> entries = new ArrayList<>();
 
     @Override
     public int size() {
-        return -1;
+        return entries.size();
     }
 
     @Override
-    public boolean isEmptry() {
-        return false;
+    public boolean isEmpty() {
+        return size() == 0;
     }
 
     @Override
     public Cart get(User key) {
-        // find the cart associate with the key
+        for (Entry e : entries) {
+            if (e.getKey().equals(key)) return e.getValue();
+        }
         return null;
     }
 
     @Override
     public void put(User key, Cart value) {
-        // add the key, value entry to the entries list
+        for (Entry e : entries) {
+            if (e.getKey() == key) {
+                e.setValue(value);
+                return;
+            }
+        }
+        Entry entry = new Entry(key, value);
+        entries.add(entry);
     }
 
 
     @Override
     public List<User> getKeys() {
-        // get all the keys in the map
-        return null;
+        List<User> users = new ArrayList<>();
+        for(Entry e : entries){
+            users.add(e.getKey());
+        }
+        return users;
     }
 
     @Override
     public List<Cart> getValues() {
-        // get all the values in the map
-        return null;
+        List<Cart> carts = new ArrayList<>();
+        for (Entry e : entries) {
+            carts.add(e.getValue());
+        }
+        return carts;
     }
 
     @Override
     public Cart remove(User key) {
-        return null;
+        Cart cart = null;
+        for (Entry e : entries) {
+            if (e.getKey() == key) {
+                cart = e.getValue();
+                e.setValue(null);
+            }
+        }
+        return cart;
     }
 }

src/main/java/org/zipcoder/store/MyHashMap.java

@@ -19,32 +19,59 @@ public class MyHashMap implements MyMap{
 
     @Override
     public int size() {
-        return -1;
+        int count = 0;
+        if (!isEmpty()) {
+            for (int i = 0; i < entries.length; i++) {
+                if (entries[i].size() > 0) count++;
+            }
+            return count;
+        } else return 0;
     }
 
     @Override
-    public boolean isEmptry() {
-        return false;
+    public boolean isEmpty() {
+        int count = 0;
+        for (int i = 0; i < entries.length; i++) {
+            if (entries[i].size() != 0) count++;
+        }
+        return count == 0;
     }
 
     @Override
     public Cart get(User key) {
-        return null;
+        Cart cart = null;
+        for (Entry e : entries[bucketIndex(key)]) {
+            cart = e.getValue();
+        }
+        return cart;
     }
 
     @Override
     public void put(User key, Cart value) {
-
+        Entry e = new Entry(key, value);
+        entries[bucketIndex(key)].add(e);
     }
 
     @Override
     public List<User> getKeys() {
-        return null;
+        List<User> keys = new ArrayList<>();
+        for (int i = 0; i < entries.length; i++) {
+            for (Entry e : entries[i]) {
+                keys.add(e.getKey());
+            }
+        }
+        return keys;
     }
 
     @Override
     public List<Cart> getValues() {
-        return null;
+        List<Cart> values = new ArrayList<>();
+        for (int i = 0; i < entries.length; i++) {
+            for (Entry e : entries[i]) {
+                values.add(e.getValue());
+            }
+        }
+        return values;
     }
 
     @Override

src/main/java/org/zipcoder/store/MyMap.java

@@ -12,7 +12,7 @@ public interface MyMap {
     /**
      * @return true if the map has one or more item in it. False otherwise.
      */
-    public boolean isEmptry();
+    public boolean isEmpty();
 
     /**
      * Return the cart associated with the user

src/main/java/org/zipcoder/store/User.java

@@ -37,4 +37,13 @@ public class User {
     public void setName(String name) {
         this.name = name;
     }
+
+    public boolean equals(User u) {
+        return this.hashCode() == u.hashCode();
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.id, this.name);
+    }
 }

src/test/java/org/zipcoder/store/ListMapTest.java

@@ -116,7 +116,7 @@ public class ListMapTest {
 
     @Test
     public void testIsEmpty_WithoutEntry(){
-        Assert.assertTrue(myMap.isEmptry());
+        Assert.assertTrue(myMap.isEmpty());
     }
 
     @Test
@@ -124,12 +124,11 @@ public class ListMapTest {
         // Given
         User user1 = new User("Monica");
         Cart cart1 = new Cart(45);
-
         // When
         myMap.put(user1, cart1);
 
         // Then
-        Assert.assertFalse(myMap.isEmptry());
+        Assert.assertFalse(myMap.isEmpty());
     }
 
     @Test
@@ -194,8 +193,8 @@ public class ListMapTest {
 //            Assert.assertEquals(actualCart, expectedCart);
 //        }
 //    }
-
-//    BONUS
+//
+//    //BONUS
 //    @Test
 //    public void testRemove(){
 //        // Given

src/test/java/org/zipcoder/store/MyHashMapTest.java

@@ -116,7 +116,7 @@ public class MyHashMapTest {
 
     @Test
     public void testIsEmpty_WithoutEntry(){
-        Assert.assertTrue(myMap.isEmptry());
+        Assert.assertTrue(myMap.isEmpty());
     }
 
     @Test
@@ -129,7 +129,7 @@ public class MyHashMapTest {
         myMap.put(user1, cart1);
 
         // Then
-        Assert.assertFalse(myMap.isEmptry());
+        Assert.assertFalse(myMap.isEmpty());
     }
 
     @Test
@@ -174,7 +174,7 @@ public class MyHashMapTest {
         Assert.assertTrue(values.contains(cart2));
     }
 
-//    I commented this out because it takes a long time to run. Uncomment it when implement your put method, uncomment this test
+    //I commented this out because it takes a long time to run. Uncomment it when implement your put method, uncomment this test
 //    @Test
 //    public void testPutAndGet_WithManyItems(){
 //        // Given