Started a test case for inventory, so far using a filesystem backend

src/tests/test_inventory.py

@@ -0,0 +1,44 @@
+"""Tests for inventory"""
+
+import os
+import shutil
+import struct
+import tempfile
+import time
+import unittest
+
+from pybitmessage.addresses import calculateInventoryHash
+
+from .partial import TestPartialRun
+
+
+class TestFilesystemInventory(TestPartialRun):
+    """A test case for the inventory using filesystem backend"""
+
+    @classmethod
+    def setUpClass(cls):
+        cls.home = os.environ['BITMESSAGE_HOME'] = tempfile.mkdtemp()
+        super(TestFilesystemInventory, cls).setUpClass()
+
+        from inventory import create_inventory_instance
+        cls.inventory = create_inventory_instance('filesystem')
+
+    def test_consistency(self):
+        """Ensure the inventory is of proper class"""
+        if os.path.isfile(os.path.join(self.home, 'messages.dat')):
+            # this will likely never happen
+            self.fail("Failed to configure filesystem inventory!")
+
+    def test_appending(self):
+        """Add a sample message to the inventory"""
+        TTL = 24 * 60 * 60
+        embedded_time = int(time.time() + TTL)
+        msg = struct.pack('>Q', embedded_time) + os.urandom(166)
+        invhash = calculateInventoryHash(msg)
+        self.inventory[invhash] = (2, 1, msg, embedded_time, b'')
+
+    @classmethod
+    def tearDownClass(cls):
+        super(TestFilesystemInventory, cls).tearDownClass()
+        cls.inventory.flush()
+        shutil.rmtree(os.path.join(cls.home, cls.inventory.topDir))