Monkey-patch version to test compatibility with optimagic

Author: timmens

src/tranquilo/models.py

@@ -98,7 +98,7 @@ def add_models(model1, model2):
         Union[ScalarModel, VectorModel]: The sum of the two models.
 
     """
-    if isinstance(model1, type(model2)):
+    if not isinstance(model1, type(model2)):
         raise TypeError("Models must be of the same type.")
 
     if not np.allclose(model1.shift, model2.shift):

tests/conftest.py

@@ -0,0 +1,14 @@
+import optimagic.optimizers.tranquilo as t
+from _pytest.monkeypatch import MonkeyPatch
+
+_mp = MonkeyPatch()
+
+
+def pytest_configure(config):
+    _mp.setattr(
+        t, "IS_TRANQUILO_VERSION_NEWER_OR_EQUAL_TO_0_1_0", "patched-value", raising=True
+    )
+
+
+def pytest_unconfigure(config):
+    _mp.undo()