diff --git a/swap_meet/clothing.py b/swap_meet/clothing.py
index b8afdeb1e..9032f334b 100644
--- a/swap_meet/clothing.py
+++ b/swap_meet/clothing.py
@@ -1,2 +1,15 @@
-class Clothing:
-    pass
\ No newline at end of file
+from swap_meet.item import Item
+
+
+class Clothing(Item):
+
+    
+    def __init__(self, condition = 0, age = None):
+        self.category = "Clothing"
+        self.condition = condition
+        self.age = age
+    
+
+    #override str() for Clothing, returns "The finest clothing you could wear."
+    def __str__(self):
+        return "The finest clothing you could wear."
\ No newline at end of file
diff --git a/swap_meet/decor.py b/swap_meet/decor.py
index eab7a9dbe..089cafcb5 100644
--- a/swap_meet/decor.py
+++ b/swap_meet/decor.py
@@ -1,2 +1,14 @@
-class Decor:
-    pass
\ No newline at end of file
+from swap_meet.item import Item
+
+
+class Decor(Item):
+    
+
+    def __init__(self, condition = 0, age = None):
+        self.category = "Decor"
+        self.condition = condition
+        self.age = age
+    
+    #override str() for Decor, returns "Something to decorate your space."
+    def __str__(self):
+        return "Something to decorate your space."
\ No newline at end of file
diff --git a/swap_meet/electronics.py b/swap_meet/electronics.py
index 2f9dff68a..b5121b859 100644
--- a/swap_meet/electronics.py
+++ b/swap_meet/electronics.py
@@ -1,2 +1,13 @@
-class Electronics:
-    pass
+from swap_meet.item import Item
+
+
+class Electronics(Item):
+    
+    def __init__(self, condition = 0, age = None):
+        self.category = "Electronics"
+        self.condition = condition
+        self.age = age
+
+    #override str() for Electronics, returns "A gadget full of buttons and secrets."
+    def __str__(self):
+        return "A gadget full of buttons and secrets."
diff --git a/swap_meet/item.py b/swap_meet/item.py
index 560d759c2..452236fbc 100644
--- a/swap_meet/item.py
+++ b/swap_meet/item.py
@@ -1,2 +1,36 @@
+
+
 class Item:
-    pass
\ No newline at end of file
+    
+    def __init__(self, category = "", condition = 0, age = None):
+        self.category = category
+        self.condition = condition
+        self.age = age
+
+    #override str() for Item, returns "Hello World!" instead
+    def __str__(self):
+        return "Hello World!"
+
+
+    #describes condition based on the value, range from 0 to 5
+    def condition_description(self):
+
+        if self.condition == 0:
+            return "Terrible condition"
+        
+        if self.condition == 1:
+            return "Bad condition"
+
+        if self.condition == 2:
+            return "Slightly bad condition"
+
+        if self.condition == 3:
+            return "Acceptable condition"
+
+        if self.condition == 4:
+            return "Good condition"
+
+        if self.condition == 5:
+            return "Mint conditon"
+
+
diff --git a/swap_meet/vendor.py b/swap_meet/vendor.py
index 87302c056..299e9efae 100644
--- a/swap_meet/vendor.py
+++ b/swap_meet/vendor.py
@@ -1,2 +1,140 @@
+from swap_meet.item import Item
+
 class Vendor:
-    pass
\ No newline at end of file
+    def __init__(self, inventory = None):
+        #code on lines 6-7 from https://docs.python-guide.org/writing/gotchas/
+        if inventory == None:
+            inventory = []
+        self.inventory = inventory
+
+    # Adds the item to the inventory
+    def add(self, item):
+        self.inventory.append(item)
+        return item
+
+
+    # Removes the matching item from the inventory
+    def remove(self, item):
+        if item not in self.inventory:
+            return False
+        else:
+            self.inventory.remove(item)
+            return item
+
+
+    # Takes one argument: a string, representing a category
+    # Returns a list of Items in the inventory with that category
+    def get_by_category(self, category):
+        #self.item = Item(category)
+        item_list = []
+        for item in self.inventory:
+            if item.category == category:
+                item_list.append(item)
+
+
+        return item_list
+
+
+    # removes my_item from this Vendor's inventory
+    # adds my_item to the other Vendor's inventory
+    # removes their_item from other Vendor's inventory
+    # adds their_item to the this Vendor's inventory
+    def swap_items(self, other_vendor, my_item, their_item):
+
+        if (my_item not in self.inventory) or (their_item not in other_vendor.inventory):
+            return False
+        
+        self.remove(my_item)
+        other_vendor.add(my_item)
+        
+        other_vendor.remove(their_item)
+        self.add(their_item)
+        
+
+        return True
+
+
+    #removes first item from this Vendor's inventory
+    # adds the other Vendor's first item
+    # removes first item from other Vendor's inventory
+    # adds this Vendor's first item
+    def swap_first_item(self, other_vendor):
+        if len(self.inventory) == 0 or len(other_vendor.inventory) == 0:
+            return False
+
+        self.swap_items(other_vendor, self.inventory[0], other_vendor.inventory[0])
+
+        return True
+
+
+    #gets the item with the best condition in a certain category
+    def get_best_by_category(self, category):
+
+        category_inventory = self.get_by_category(category)
+
+        if len(category_inventory) == 0:
+            return None
+        
+        highest_rated = category_inventory[0]
+        
+        for item in category_inventory:
+    
+            if (item.condition) > (highest_rated.condition):
+                highest_rated = item
+                
+        return highest_rated
+
+
+    #swap the best item of certain categories with another Vendor 
+    def swap_best_by_category(self, other, my_priority, their_priority):
+
+        #find best item in my inventory that matches their_priority
+        my_best = self.get_best_by_category(their_priority)
+
+        their_best = other.get_best_by_category(my_priority)
+        
+        if my_best == None or their_best == None:
+            return False
+
+        self.swap_items(other, my_best, their_best)
+
+        return True
+
+        
+
+    def swap_by_newest(self, other):
+        my_newest = self.inventory[0]
+        for item in self.inventory:
+            if not item.age is None:
+                my_newest = item
+                break
+        if my_newest.age is None:
+            return False
+        
+        for item in self.inventory:
+            if not item.age is None:
+                if item.age < my_newest.age:
+                    my_newest = item
+
+        their_newest = other.inventory[0]
+        for item in other.inventory:
+            if not item.age is None:
+                their_newest = item
+                break
+        if their_newest.age is None:
+            return False
+        
+        for item in other.inventory:
+            if not item.age is None:
+                if item.age < their_newest.age:
+                    their_newest = item
+
+        self.swap_items(other, my_newest, their_newest)
+        return True
+
+
+
+
+
+
+
diff --git a/tests/integration_tests/test_wave_01_02_03.py b/tests/integration_tests/test_wave_01_02_03.py
index 9912414da..e766bbbf7 100644
--- a/tests/integration_tests/test_wave_01_02_03.py
+++ b/tests/integration_tests/test_wave_01_02_03.py
@@ -2,11 +2,13 @@
 from swap_meet.vendor import Vendor
 from swap_meet.item import Item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 @pytest.mark.integration_test
 def test_integration_wave_01_02_03():
     # make a vendor  
     vendor = Vendor()
+
+
     assert len(vendor.inventory) == 0
 
     # add an item
@@ -49,6 +51,4 @@ def test_integration_wave_01_02_03():
     assert len(vendor.inventory) == 1
     assert len(other_vendor.inventory) == 1
     assert item2 in other_vendor.inventory
-    assert item3 in vendor.inventory
-
-
+    assert item3 in vendor.inventory
\ No newline at end of file
diff --git a/tests/integration_tests/test_wave_04_05_06.py b/tests/integration_tests/test_wave_04_05_06.py
index 4d0be9909..25f268c85 100644
--- a/tests/integration_tests/test_wave_04_05_06.py
+++ b/tests/integration_tests/test_wave_04_05_06.py
@@ -4,7 +4,7 @@
 from swap_meet.decor import Decor
 from swap_meet.electronics import Electronics
 
-@pytest.mark.skip
+#@pytest.mark.skip
 @pytest.mark.integration_test
 def test_integration_wave_04_05_06():
     camila = Vendor()
diff --git a/tests/unit_tests/test_wave_01.py b/tests/unit_tests/test_wave_01.py
index 58478ccf9..b41df178d 100644
--- a/tests/unit_tests/test_wave_01.py
+++ b/tests/unit_tests/test_wave_01.py
@@ -2,12 +2,12 @@
 import pytest
 from swap_meet.vendor import Vendor
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_vendor_has_inventory():
     vendor = Vendor()
     assert len(vendor.inventory) == 0
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_vendor_takes_optional_inventory():
     inventory = ["a", "b", "c"]
     vendor = Vendor(inventory=inventory)
@@ -16,7 +16,7 @@ def test_vendor_takes_optional_inventory():
     assert "b" in vendor.inventory
     assert "c" in vendor.inventory
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_adding_to_inventory():
     vendor = Vendor()
     item = "new item"
@@ -27,7 +27,7 @@ def test_adding_to_inventory():
     assert item in vendor.inventory
     assert result == item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_removing_from_inventory_returns_item():
     item = "item to remove"
     vendor = Vendor(
@@ -40,7 +40,7 @@ def test_removing_from_inventory_returns_item():
     assert item not in vendor.inventory
     assert result == item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_removing_not_found_is_false():
     item = "item to remove"
     vendor = Vendor(
@@ -48,8 +48,10 @@ def test_removing_not_found_is_false():
     )
 
     result = vendor.remove(item)
-
-    raise Exception("Complete this test according to comments below.")
+    
+    #raise Exception("Complete this test according to comments below.")
+    
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
+    assert result == False
diff --git a/tests/unit_tests/test_wave_02.py b/tests/unit_tests/test_wave_02.py
index 3d7060d7c..f51fa588f 100644
--- a/tests/unit_tests/test_wave_02.py
+++ b/tests/unit_tests/test_wave_02.py
@@ -2,12 +2,12 @@
 from swap_meet.vendor import Vendor
 from swap_meet.item import Item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_items_have_blank_default_category():
     item = Item()
     assert item.category == ""
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_get_items_by_category():
     item_a = Item(category="clothing")
     item_b = Item(category="electronics")
@@ -23,7 +23,7 @@ def test_get_items_by_category():
     assert item_c in items
     assert item_b not in items
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_get_no_matching_items_by_category():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
@@ -34,7 +34,10 @@ def test_get_no_matching_items_by_category():
 
     items = vendor.get_by_category("electronics")
 
-    raise Exception("Complete this test according to comments below.")
+    #raise Exception("Complete this test according to comments below.")
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
+    assert item_a not in items
+    assert item_b not in items
+    assert item_c not in items
\ No newline at end of file
diff --git a/tests/unit_tests/test_wave_03.py b/tests/unit_tests/test_wave_03.py
index 0300b638f..720879a7c 100644
--- a/tests/unit_tests/test_wave_03.py
+++ b/tests/unit_tests/test_wave_03.py
@@ -2,7 +2,7 @@
 from swap_meet.vendor import Vendor
 from swap_meet.item import Item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_item_overrides_to_string():
     item = Item()
 
@@ -10,7 +10,7 @@ def test_item_overrides_to_string():
 
     assert stringified_item == "Hello World!"
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_items_returns_true():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
@@ -38,7 +38,7 @@ def test_swap_items_returns_true():
     assert item_b in jolie.inventory
     assert result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_items_when_my_item_is_missing_returns_false():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
@@ -65,7 +65,7 @@ def test_swap_items_when_my_item_is_missing_returns_false():
     assert item_e in jolie.inventory
     assert not result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_items_when_their_item_is_missing_returns_false():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
@@ -92,7 +92,7 @@ def test_swap_items_when_their_item_is_missing_returns_false():
     assert item_e in jolie.inventory
     assert not result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_items_from_my_empty_returns_false():
     fatimah = Vendor(
         inventory=[]
@@ -112,7 +112,7 @@ def test_swap_items_from_my_empty_returns_false():
     assert len(jolie.inventory) == 2
     assert not result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_items_from_their_empty_returns_false():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
diff --git a/tests/unit_tests/test_wave_04.py b/tests/unit_tests/test_wave_04.py
index 8190a4ebb..f3c91e846 100644
--- a/tests/unit_tests/test_wave_04.py
+++ b/tests/unit_tests/test_wave_04.py
@@ -2,7 +2,7 @@
 from swap_meet.vendor import Vendor
 from swap_meet.item import Item
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_first_item_returns_true():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
@@ -30,7 +30,7 @@ def test_swap_first_item_returns_true():
     assert item_a in jolie.inventory
     assert result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_first_item_from_my_empty_returns_false():
     fatimah = Vendor(
         inventory=[]
@@ -48,7 +48,7 @@ def test_swap_first_item_from_my_empty_returns_false():
     assert len(jolie.inventory) == 2
     assert not result
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_first_item_from_their_empty_returns_false():
     item_a = Item(category="clothing")
     item_b = Item(category="clothing")
diff --git a/tests/unit_tests/test_wave_05.py b/tests/unit_tests/test_wave_05.py
index 7abea06cd..d8575f6e2 100644
--- a/tests/unit_tests/test_wave_05.py
+++ b/tests/unit_tests/test_wave_05.py
@@ -3,25 +3,26 @@
 from swap_meet.decor import Decor
 from swap_meet.electronics import Electronics
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_clothing_has_default_category_and_to_str():
     cloth = Clothing()
+
     assert cloth.category == "Clothing"
     assert str(cloth) == "The finest clothing you could wear."
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_decor_has_default_category_and_to_str():
     decor = Decor()
     assert decor.category == "Decor"
     assert str(decor) == "Something to decorate your space."
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_electronics_has_default_category_and_to_str():
     electronics = Electronics()
     assert electronics.category == "Electronics"
     assert str(electronics) == "A gadget full of buttons and secrets."
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_items_have_condition_as_float():
     items = [
         Clothing(condition=3.5),
@@ -31,7 +32,7 @@ def test_items_have_condition_as_float():
     for item in items:
         assert item.condition == pytest.approx(3.5)
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_items_have_condition_descriptions_that_are_the_same_regardless_of_type():
     items = [
         Clothing(condition=5),
diff --git a/tests/unit_tests/test_wave_06.py b/tests/unit_tests/test_wave_06.py
index 1f7065ab4..c9d0c012c 100644
--- a/tests/unit_tests/test_wave_06.py
+++ b/tests/unit_tests/test_wave_06.py
@@ -4,7 +4,7 @@
 from swap_meet.decor import Decor
 from swap_meet.electronics import Electronics
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_best_by_category():
     item_a = Clothing(condition=2.0)
     item_b = Decor(condition=2.0)
@@ -20,7 +20,7 @@ def test_best_by_category():
     assert best_item.category == "Clothing"
     assert best_item.condition == pytest.approx(4.0)
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_best_by_category_no_matches_is_none():
     item_a = Decor(condition=2.0)
     item_b = Decor(condition=2.0)
@@ -33,7 +33,7 @@ def test_best_by_category_no_matches_is_none():
 
     assert best_item is None
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_best_by_category_with_duplicates():
     # Arrange
     item_a = Clothing(condition=2.0)
@@ -50,7 +50,7 @@ def test_best_by_category_with_duplicates():
     assert best_item.category == "Clothing"
     assert best_item.condition == pytest.approx(4.0)
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_best_by_category():
     # Arrange
     # me
@@ -76,16 +76,26 @@ def test_swap_best_by_category():
         their_priority="Decor"
     )
 
-    raise Exception("Complete this test according to comments below.")
+    #raise Exception("Complete this test according to comments below.")
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
     # Assertions should check:
     # - That the results is truthy
+    assert result == True
     # - That tai and jesse's inventories are the correct length
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
     # - That all the correct items are in tai and jesse's inventories, including the items which were swapped from one vendor to the other
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_f in tai.inventory
+    assert item_c in jesse.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_best_by_category_reordered():
     # Arrange
     item_a = Decor(condition=2.0)
@@ -109,16 +119,26 @@ def test_swap_best_by_category_reordered():
         their_priority="Decor"
     )
 
-    raise Exception("Complete this test according to comments below.")
+    #raise Exception("Complete this test according to comments below.")
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
     # Assertions should check:
     # - That result is truthy
+    assert result == True
     # - That tai and jesse's inventories are the correct length
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
     # - That all the correct items are in tai and jesse's inventories, and that the items that were swapped are not there
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_f in tai.inventory
+    assert item_c in jesse.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
 
-@pytest.mark.skip
+
+#@pytest.mark.skip
 def test_swap_best_by_category_no_inventory_is_false():
     tai = Vendor(
         inventory=[]
@@ -144,7 +164,7 @@ def test_swap_best_by_category_no_inventory_is_false():
     assert item_b in jesse.inventory
     assert item_c in jesse.inventory
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_best_by_category_no_other_inventory_is_false():
     item_a = Clothing(condition=2.0)
     item_b = Decor(condition=4.0)
@@ -170,7 +190,7 @@ def test_swap_best_by_category_no_other_inventory_is_false():
     assert item_b in tai.inventory
     assert item_c in tai.inventory
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_best_by_category_no_match_is_false():
     # Arrange
     item_a = Decor(condition=2.0)
@@ -194,16 +214,26 @@ def test_swap_best_by_category_no_match_is_false():
         their_priority="Clothing"
     )
 
-    raise Exception("Complete this test according to comments below.")
+    #raise Exception("Complete this test according to comments below.")
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
     # Assertions should check:
     # - That result is falsy
+    assert result == False
     # - That tai and jesse's inventories are the correct length
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
     # - That all the correct items are in tai and jesse's inventories
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_c in tai.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+    assert item_f in jesse.inventory
+
 
-@pytest.mark.skip
+#@pytest.mark.skip
 def test_swap_best_by_category_no_other_match_is_false():
     # Arrange
     item_a = Decor(condition=2.0)
@@ -227,11 +257,119 @@ def test_swap_best_by_category_no_other_match_is_false():
         their_priority="Decor"
     )
 
-    raise Exception("Complete this test according to comments below.")
+    #raise Exception("Complete this test according to comments below.")
     # *********************************************************************
     # ****** Complete Assert Portion of this test **********
     # *********************************************************************
     # Assertions should check:
     # - That result is falsy
+    assert result == False
     # - That tai and jesse's inventories are the correct length
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
     # - That all the correct items are in tai and jesse's inventories
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_c in tai.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+    assert item_f in jesse.inventory
+
+
+
+
+# tests for swap_by_newest
+
+def test_swap_newest():
+    # Arrange
+    item_a = Decor(age=8.0)
+    item_b = Electronics(age=None)
+    item_c = Decor(age = 2.0)
+    tai = Vendor(
+        inventory=[item_c, item_b, item_a]
+    )
+
+    item_d = Clothing(age=None)
+    item_e = Decor(age=4.0)
+    item_f = Clothing(age=1.0)
+    jesse = Vendor(
+        inventory=[item_e, item_d, item_f]
+    )
+
+    # Act
+    result = tai.swap_by_newest(other=jesse)
+
+    assert result == True
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
+
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_f in tai.inventory
+    assert item_c in jesse.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+
+
+
+def test_swap_newest_all_ages_none():
+    # Arrange
+    item_a = Decor(age=None)
+    item_b = Electronics(age=None)
+    item_c = Decor(age=None)
+    tai = Vendor(
+        inventory=[item_c, item_b, item_a]
+    )
+
+    item_d = Clothing(age=None)
+    item_e = Decor(age=None)
+    item_f = Clothing(age=None)
+    jesse = Vendor(
+        inventory=[item_e, item_d, item_f]
+    )
+
+    # Act
+    result = tai.swap_by_newest(other=jesse)
+
+    assert result == False
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
+
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_c in tai.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+    assert item_f in jesse.inventory
+
+    
+
+def test_swap_newest_one_vendor_ages_none():
+    # Arrange
+    item_a = Decor(age=None)
+    item_b = Electronics(age=None)
+    item_c = Decor(age=None)
+    tai = Vendor(
+        inventory=[item_c, item_b, item_a]
+    )
+
+    item_d = Clothing(age=4.0)
+    item_e = Decor(age=2.0)
+    item_f = Clothing(age=1.0)
+    jesse = Vendor(
+        inventory=[item_e, item_d, item_f]
+    )
+
+    # Act
+    result = tai.swap_by_newest(other=jesse)
+
+    assert result == False
+    assert len(tai.inventory) == 3
+    assert len(jesse.inventory) == 3
+
+    assert item_a in tai.inventory
+    assert item_b in tai.inventory
+    assert item_c in tai.inventory
+    assert item_d in jesse.inventory
+    assert item_e in jesse.inventory
+    assert item_f in jesse.inventory
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