Automated tests (#566)

* return error for wrong key

* payment check use key dependency

* more expressive error

* re-add optional key

* more tests

* more

* more granular

* more testing

* custom event_loop

* tests work

* fix lots of mypy errors

* test_public_api

* both files

* remove unused import

* tests

* tests working

* rm empty file

* minimal test

* set FAKE_WALLET_SECRET="ToTheMoon1"

* set FAKE_WALLET_SECRET="ToTheMoon1"

* trial and error

* trial and error

* test postgres

* test postgres

* test postgres

* test postgres

* test postgres

* test postgres

* test build

* skip mypy

tests/mocks.py

@@ -1,3 +1,4 @@
+import time
 from mock import AsyncMock
 from lnbits import bolt11
 from lnbits.wallets.base import (
@@ -9,20 +10,51 @@ from lnbits.wallets.base import (
 )
 from lnbits.settings import WALLET
 
+from lnbits.wallets.fake import FakeWallet
+
+from .helpers import get_random_string
+
+# primitive event loop for generate_mock_invoice()
+def drive(c):
+    while True:
+        try:
+            c.send(None)
+        except StopIteration as e:
+            return e.value
+
+
+# generates an invoice with FakeWallet
+async def generate_mock_invoice(**x):
+    invoice = await FakeWallet.create_invoice(
+        FakeWallet(), amount=10, memo=f"mock invoice {get_random_string()}"
+    )
+    return invoice
+
+
 WALLET.status = AsyncMock(
     return_value=StatusResponse(
         "",  # no error
         1000000,  # msats
     )
 )
-WALLET.create_invoice = AsyncMock(
-    return_value=InvoiceResponse(
-        True,  # ok
-        "6621aafbdd7709ca6eea6203f362d64bd7cb2911baa91311a176b3ecaf2274bd",  # checking_id (i.e. payment_hash)
-        "lntb1u1psezhgspp5vcs6477awuyu5mh2vgplxckkf0tuk2g3h253xydpw6e7etezwj7sdqqcqzpgxqyz5vqsp5dxpw8zs77hw5pla4wz4mfujllyxtlpu443auur2uxqdrs8q2h56q9qyyssq65zk30ylmygvv5y4tuwalnf3ttnqjn57ef6rmcqg0s53akem560jh8ptemjcmytn3lrlatw4hv9smg88exv3v4f4lqnp96s0psdrhxsp6pp75q",  # payment_request
-        "",  # no error
-    )
-)
+
+WALLET.create_invoice = generate_mock_invoice
+
+# NOTE: This mock fails since it yields the same invoice multiple
+# times which makes the db throw an error due to uniqueness contraints
+# on the checking ID
+
+# # finally we await it
+# invoice = drive(generate_mock_invoice())
+
+# WALLET.create_invoice = AsyncMock(
+#     return_value=InvoiceResponse(
+#         True,  # ok
+#         invoice.checking_id,  # checking_id (i.e. payment_hash)
+#         invoice.payment_request,  # payment_request
+#         "",  # no error
+#     )
+# )
 
 
 def pay_invoice_side_effect(