diff --git a/tests/test_store.py b/tests/test_store.py
new file mode 100644
index 0000000..f725b8d
--- /dev/null
+++ b/tests/test_store.py
@@ -0,0 +1,101 @@
+import unittest
+
+from mech_factory import InnerStructure, Reaktor
+from mech_factory.store import ComponentStore, ItemStore, InnerArmorStore
+from mech_factory.component_storage.items import Gyroskope, Item, BigItem, DurableItem, ItemStatus, ItemTypes
+
+
+class TestComponentStore(unittest.TestCase):
+    def setUp(self):
+        # reactor_value = 165
+        self._store = ComponentStore(tonnage=55.0, movement_rate=3)
+
+    def test_build_inner_structure(self):
+        item = self._store.get_inner_structure()
+
+        self.assertIsInstance(item, InnerStructure)
+        self.assertIsInstance(item.gyroskope, Gyroskope)
+        self.assertEqual(item.tonnage, 5.5)
+        self.assertIsInstance(item.areas, dict)
+        self.assertCountEqual(item.areas, {})
+        self.assertIsInstance(item.zones, dict)
+        self.assertCountEqual(item.zones, {})
+
+    def test_build_gyroscope(self):
+        item = self._store.get_gyroskope()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertIsInstance(item, BigItem)
+        self.assertEqual(item.tonnage, 2.0)
+        self.assertEqual(item.type, ItemTypes.GYROSKOPE)
+        self.assertIsInstance(item, DurableItem)
+        self.assertEqual(item.max_strike, 2)
+
+    def test_build_reaktor(self):
+        item = self._store.get_reaktor()
+
+        self.assertIsInstance(item, Reaktor)
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertIsInstance(item, BigItem)
+        self.assertEqual(item.tonnage, 6.0)
+        self.assertEqual(item.type, ItemTypes.REAKTOR)
+        self.assertIsInstance(item, DurableItem)
+        self.assertEqual(item.max_strike, 3)
+
+class TestItemsStore(unittest.TestCase):
+
+    def setUp(self):
+        self._store = ItemStore()
+
+    def test_build_cockpit(self):
+        item = self._store.get_cockpit()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertIsInstance(item, BigItem)
+        self.assertEqual(item.type, ItemTypes.COCKPIT)
+        self.assertEqual(item.tonnage, 3.0)
+
+    def test_build_sustainment(self):
+        item = self._store.get_sustainment()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertEqual(item.type, ItemTypes.SUSTAINMENT)
+
+    def test_build_sensors(self):
+        item = self._store.get_sensors()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertEqual(item.type, ItemTypes.SENSORS)
+        self.assertIsInstance(item, DurableItem)
+        self.assertEqual(item.max_strike, 2)
+
+    def test_build_joint(self):
+        item = self._store.get_joint()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertEqual(item.type, ItemTypes.JOINT)
+
+    def test_build_activator(self):
+        item = self._store.get_activator()
+
+        self.assertIsInstance(item, Item)
+        self.assertEqual(item.state, ItemStatus.FINE)
+        self.assertEqual(item.type, ItemTypes.ACTIVATOR)
+
+class TestInnerAmorForTonnageAndArea(unittest.TestCase):
+    def setUp(self):
+        self._store = InnerArmorStore(tonnage=55.0)
+
+    def test_build_inner_structure(self):
+        self.assertEqual(self._store.get_head_amor(), 3)
+        self.assertEqual(self._store.get_middle_torso_amor(), 18)
+        self.assertEqual(self._store.get_side_torso_amor(), 13)
+        self.assertEqual(self._store.get_arm_amore(), 9)
+        self.assertEqual(self._store.get_leg_amore(), 13)
+