Fix unit tests (#62)

tests/resources/test_prices.py

@@ -3,6 +3,7 @@ import flask_testing
 from api import create_app, db
 from api.models.product import Material, Product, Currencies
 from api.models import Inquiry, Designer, Market
+from unittest.mock import patch
 
 
 class TestEndpoints(flask_testing.TestCase):
@@ -11,10 +12,13 @@ class TestEndpoints(flask_testing.TestCase):
 
     def setUp(self):
         db.create_all()
+        self._price_adjustments_patcher = patch('api.lib.prices.get_price_adjustment', return_value=1.0)
+        self._price_adjustments_patcher.start()
 
     def tearDown(self):
         db.session.remove()
         db.drop_all()
+        self._price_adjustments_patcher.stop()
 
     def _add_market(self):
         currency = Currencies(iso3char="SEK", exchange_rate=1)