Add chunk relate impl and test case

test/test_chunk.py

@@ -0,0 +1,36 @@
+import sys
+import os
+
+dir_path = os.path.dirname(os.path.realpath(__file__))
+print(dir_path)
+
+sys.path.append("{}/../src/".format(dir_path))
+print(sys.path)
+
+from knowledge import ChunkTracker, ChunkID, HashValue, PositionType
+
+
+import asyncio
+import unittest
+
+
+class TestChunk(unittest.TestCase):
+    def test_chunk_tracker(self):
+        tracker = ChunkTracker()
+        
+        hash = HashValue.hash_data("1234567890".encode("utf-8"));
+        cid = ChunkID.new_chunk_id(hash)
+        print(cid)
+            
+        tracker.add_position(cid, "/tmp/1", PositionType.File)
+        ret = tracker.get_position(cid)
+        print(ret[0])
+        
+        tracker.remove_position(cid)
+        ret = tracker.get_position(cid)
+        self.assertEqual(ret, None)
+    
+
+
+if __name__ == "__main__":
+    unittest.main()