adding issuer for some missing tests

Author: 4gust

tests/simulator.py

@@ -31,6 +31,7 @@ def __init__(self, number_of_tenants=1, tokens_per_tenant=1, cache_hit=False):
         with patch.object(msal.authority, "tenant_discovery", return_value={
             "authorization_endpoint": "https://contoso.com/placeholder",
             "token_endpoint": "https://contoso.com/placeholder",
+            "issuer": "https://contoso.com/placeholder",
         }) as _:  # Otherwise it would fail on OIDC discovery
             self.apps = [  # In MSAL Python, each CCA binds to one tenant only
                 msal.ConfidentialClientApplication(

tests/test_account_source.py

@@ -26,6 +26,7 @@ def _mock_post(url, headers=None, *args, **kwargs):
 @patch.object(msal.authority, "tenant_discovery", return_value={
     "authorization_endpoint": "https://contoso.com/placeholder",
     "token_endpoint": "https://contoso.com/placeholder",
+    "issuer": "https://contoso.com/placeholder",
 })  # Otherwise it would fail on OIDC discovery
 class TestAccountSourceBehavior(unittest.TestCase):