test(vars): assert real error messages in computed var tests

tests/units/test_var.py

@@ -782,11 +782,10 @@ def test_computed_var_without_annotation_error(request, fixture):
     with pytest.raises(TypeError) as err:
         state = request.getfixturevalue(fixture)
         state.var_without_annotation.foo
-        full_name = state.var_without_annotation._var_full_name
-        assert (
-            err.value.args[0]
-            == f"You must provide an annotation for the state var `{full_name}`. Annotation cannot be `typing.Any`"
-        )
+    assert (
+        err.value.args[0]
+        == "Computed var 'var_without_annotation' must have a type annotation."
+    )
 
 
 @pytest.mark.parametrize(
@@ -827,11 +826,9 @@ def test_computed_var_with_annotation_error(request, fixture):
     with pytest.raises(AttributeError) as err:
         state = request.getfixturevalue(fixture)
         state.var_with_annotation.foo
-        full_name = state.var_with_annotation._var_full_name
-        assert (
-            err.value.args[0]
-            == f"The State var `{full_name}` has no attribute 'foo' or may have been annotated wrongly."
-        )
+    assert err.value.args[0].endswith(
+        "of type <class 'str'> has no attribute 'foo' or may have been annotated wrongly."
+    )
 
 
 @pytest.mark.parametrize(