TokenV3 and new Mint startup in tests (#149)

* tokenv3 send and receive
* receive v2 and v1 tokens with tests

tests/conftest.py

@@ -1,5 +1,7 @@
 import multiprocessing
+import shutil
 import time
+from pathlib import Path
 
 import pytest
 import pytest_asyncio
@@ -7,6 +9,7 @@ import uvicorn
 from uvicorn import Config, Server
 
 from cashu.core.migrations import migrate_databases
+from cashu.core.settings import settings
 from cashu.wallet import migrations
 from cashu.wallet.wallet import Wallet
 
@@ -23,15 +26,32 @@ class UvicornServer(multiprocessing.Process):
         self.terminate()
 
     def run(self, *args, **kwargs):
+        settings.lightning = False
+        settings.mint_lightning_backend = "FakeWallet"
+        settings.mint_listen_port = 3337
+        settings.mint_database = "data/test_mint"
+        settings.mint_private_key = "privatekeyofthemint"
+
+        dirpath = Path(settings.mint_database)
+        if dirpath.exists() and dirpath.is_dir():
+            shutil.rmtree(dirpath)
+
+        dirpath = Path("data/test_wallet")
+        if dirpath.exists() and dirpath.is_dir():
+            shutil.rmtree(dirpath)
+
         self.server.run()
 
 
 @pytest.fixture(autouse=True, scope="session")
 def mint():
-
+    settings.mint_listen_port = 3337
+    settings.port = 3337
+    settings.mint_url = "http://localhost:3337"
+    settings.port = settings.mint_listen_port
     config = uvicorn.Config(
         "cashu.mint.app:app",
-        port=3337,
+        port=settings.mint_listen_port,
         host="127.0.0.1",
     )