add test

tests/unit_test.py

@@ -1799,3 +1799,20 @@ def test_extract_arns(saml, expected):
     from tokendito import user
 
     assert user.extract_arns(saml) == expected
+
+
+def test_select_assumeable_role_no_tiles():
+    """Test exiting when there are no assumable roles."""
+    from tokendito import aws
+
+    tiles = [
+        (
+            "https://acme.okta.org/home/amazon_aws/0123456789abcdef0123/456",
+            "saml_response",
+            "arn:aws:iam::000000000000:saml/name,arn:aws:iam::000000000000:role/name",
+            "Tile Label",
+        )
+    ]
+    with pytest.raises(SystemExit) as err:
+        aws.select_assumeable_role(tiles)
+    assert err.value.code == 1