diff --git a/domain-model.md b/domain-model.md
new file mode 100644
index 00000000..c9279df0
--- /dev/null
+++ b/domain-model.md
@@ -0,0 +1,17 @@
+# Basket class
+
+
+| Member variable | Data type                         |
+|-----------------|-----------------------------------|
+| `bagelMenu`     | `static Hashmap<String, Integer>` |
+| `basket`        | `ArrayList<String>`               |
+| `basketSize`    | `int`                             |
+| `isManager`     | `Boolean`                         |
+
+
+
+| Method                | Scenario                                                                                                                                  | Output                                                                                                   |
+|-----------------------|-------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------|
+| `addBagel(String)`    | Basket not full<br/>Basket is full<br/>Bagel not on the menu                                                                              | Return "Bagel added to basket."<br/>Return "Basket is full."<br/>Return "This bagel is not on the menu." |
+| `removeBagel(String)` | Bagel exists in basket<br/>Bagel does not exist in basket                                                                                 | Return "Bagel removed from basket."<br/>Return "This bagel is not in your basket."                       |
+| `setBasketSize(int)`  | Basket capacity is changed to a positive integer by a manager<br/>Basket capacity value is not positive<br/>Basket capacity is changed by a non-manager | Return true<br/>Return false<br/>Return false                                                            |
diff --git a/src/main/java/com/booleanuk/core/Basket.java b/src/main/java/com/booleanuk/core/Basket.java
index df7a20aa..0d48ea29 100644
--- a/src/main/java/com/booleanuk/core/Basket.java
+++ b/src/main/java/com/booleanuk/core/Basket.java
@@ -1,5 +1,53 @@
 package com.booleanuk.core;
 
+import java.util.ArrayList;
+import java.util.HashMap;
+
 public class Basket {
 
+    static HashMap<String, Integer> bagelMenu = new HashMap<String, Integer>();
+    static{
+        bagelMenu.put("Sesame", 3);
+        bagelMenu.put("Oat", 3);
+        bagelMenu.put("Chicken", 5);
+        bagelMenu.put("Cheese", 4);
+    }
+
+    int basketSize = 5;
+
+    ArrayList<String> basket = new ArrayList<>();
+
+    Boolean isManager=false;
+
+    public String addBagel(String bagel){
+        if (basket.size()<basketSize){
+            if (bagelMenu.containsKey(bagel)){
+                basket.add(bagel);
+                return "Bagel added to basket.";
+            }else {
+                return "This bagel is not on the menu.";
+            }
+        }else{
+            return "Basket is full.";
+        }
+    }
+
+    public String removeBagel(String bagel){
+        if (basket.contains(bagel)){
+            basket.remove(bagel);
+            return "Bagel removed from basket.";
+        }else {
+            return "This bagel is not in your basket.";
+        }
+    }
+
+    public Boolean setBasketSize(int basketSize){
+        if ((basketSize > 0 && isManager)){
+            this.basketSize=basketSize;
+            return true;
+        }else{
+            return false;
+        }
+    }
+
 }
diff --git a/src/test/java/com/booleanuk/core/BasketTest.java b/src/test/java/com/booleanuk/core/BasketTest.java
index e35771b3..a528a9f8 100644
--- a/src/test/java/com/booleanuk/core/BasketTest.java
+++ b/src/test/java/com/booleanuk/core/BasketTest.java
@@ -4,5 +4,59 @@
 import org.junit.jupiter.api.Test;
 
 class BasketTest {
+    @Test
+    public void testAddBagel(){
+        Basket basket = new Basket();
+        // Test if valid bagel is added to basket
+        Assertions.assertEquals("Bagel added to basket.", basket.addBagel("Sesame"));
+        Assertions.assertEquals("Bagel added to basket.", basket.addBagel("Oat"));
+        // Test if invalid bagel is not added to basket
+        Assertions.assertEquals("This bagel is not on the menu.", basket.addBagel("Totally not a bagel."));
+    }
+
+    @Test
+    public void testRemoveBagel(){
+        Basket basket = new Basket();
+        basket.addBagel("Sesame");
+        basket.addBagel("Oat");
+        // Test if valid bagel is removed from basket
+        Assertions.assertEquals("Bagel removed from basket.", basket.removeBagel("Sesame"));
+        Assertions.assertEquals("Bagel removed from basket.", basket.removeBagel("Oat"));
+    }
+
+    @Test
+    public void testSetBasketSize(){
+        Basket basket = new Basket();
+        // Test if basket size is not changed by non-manager
+        Assertions.assertFalse(basket.setBasketSize(3));
+        // Test if basket size is not changed by non-manager when value is not positive
+        Assertions.assertFalse(basket.setBasketSize(-1));
+
+        basket.isManager=true;
+        // Test if basket size is not changed by manager when value is not positive
+        Assertions.assertFalse(basket.setBasketSize(-1));
+        // Test if basket size is changed by manager
+        Assertions.assertTrue(basket.setBasketSize(3));
+        Assertions.assertEquals(3, basket.basketSize);
+
+    }
+
+    @Test
+    public void testFullBasket(){
+        Basket basket = new Basket();
+        basket.isManager=true;
+        basket.setBasketSize(1);
+        basket.addBagel("Sesame");
+        // Test if customer is notified when trying to add a bagel in full basket
+        Assertions.assertEquals("Basket is full.", basket.addBagel("Oat"));
+    }
+
+    @Test
+    public void testRemoveBagelInvalid(){
+        Basket basket = new Basket();
+        basket.addBagel("Sesame");
+        // Test if customer is notified when trying to remove bagel not present in basket
+        Assertions.assertEquals("This bagel is not in your basket.", basket.removeBagel("Oat"));
+    }
 
 }