pantalaimon: Add tests.

Makefile

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+test:
+	python3 -m pytest
+	python3 -m pytest --flake8 pantalaimon

test-requirements.txt

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+pytest
+pytest-flake8
+pytest-isort
+pytest-cov
+faker

tests/store_test.py

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+import pdb
+import pytest
+import tempfile
+import shutil
+
+from nio.crypto import OlmAccount
+from nio.store import SqliteStore
+from pantalaimon.store import PanStore
+
+from faker import Faker
+from faker.providers import BaseProvider
+
+from random import choices
+from string import digits, ascii_letters, ascii_uppercase
+
+
+faker = Faker()
+
+
+class Provider(BaseProvider):
+    def mx_id(self):
+        return "@{}:{}".format(faker.user_name(), faker.hostname())
+
+    def device_id(self):
+        return "".join(choices(ascii_uppercase, k=10))
+
+    def access_token(self):
+        return "MDA" + "".join(choices(digits + ascii_letters, k=272))
+
+
+faker.add_provider(Provider)
+
+
+@pytest.fixture
+def access_token():
+    return faker.access_token()
+
+
+@pytest.fixture
+def tempdir():
+    newpath = tempfile.mkdtemp()
+    yield newpath
+    shutil.rmtree(newpath)
+
+
+@pytest.fixture
+def panstore(tempdir):
+    for _ in range(10):
+        store = SqliteStore(
+            faker.mx_id(),
+            faker.device_id(),
+            tempdir,
+            "",
+            "pan.db"
+        )
+        account = OlmAccount()
+        store.save_account(account)
+
+    store = PanStore(tempdir, "pan.db")
+    return store
+
+
+class TestClass(object):
+    def test_account_loading(self, panstore):
+        accounts = panstore.get_users()
+        # pdb.set_trace()
+        assert len(accounts) == 10
+
+    def test_token_saving(self, panstore, access_token):
+        accounts = panstore.get_users()
+        user_id = accounts[0][0]
+        device_id = accounts[0][1]
+
+        panstore.save_access_token(user_id, device_id, access_token)
+
+        token = panstore.load_access_token(user_id, device_id)
+        access_token == token