Fixed an ``AttributeError`` caused by improper handling of ``dataclasses`` inference in ``pyreverse``

Close #3256

1 files changed, 13 insertions, 0 deletions

diff --git a/tests/regrtest_data/dataclasses_pyreverse/__init__.py b/tests/regrtest_data/dataclasses_pyreverse/__init__.py
new file mode 100644
index 000000000..e4c923343
--- /dev/null
+++ b/tests/regrtest_data/dataclasses_pyreverse/__init__.py
@@ -0,0 +1,13 @@
+from dataclasses import dataclass
+
+
+@dataclass
+class InventoryItem:
+    """Class for keeping track of an item in inventory."""
+
+    name: str
+    unit_price: float
+    quantity_on_hand: int = 0
+
+    def total_cost(self) -> float:
+        return self.unit_price * self.quantity_on_hand