Add a regression tests for dataclasses with fields

Refer to #4899, was fixed in astroid's https://github.com/PyCQA/astroid/pull/1144

3 files changed, 35 insertions, 0 deletions

diff --git a/tests/functional/d/dataclass_with_field.py b/tests/functional/d/dataclass_with_field.py
new file mode 100644
index 000000000..9a807becb
--- /dev/null
+++ b/tests/functional/d/dataclass_with_field.py
@@ -0,0 +1,32 @@
+"""Regression test for https://github.com/PyCQA/pylint/issues/4899"""
+
+# pylint: disable=missing-docstring,too-few-public-methods
+
+from dataclasses import field
+from typing import List
+from pydantic.dataclasses import dataclass # [import-error]
+
+
+class Item:
+    pass
+
+
+@dataclass
+class Case:
+    """Case class (group Item)"""
+
+    name: str
+    irr: float = 0
+    items: List[Item] = field(default_factory=lambda: [])
+
+    def add_item(self, item: Item) -> None:
+        """Add an item to the item list."""
+
+        self.items.append(item)
+
+    def find_item(self, description: str) -> Item:
+        """Find an item by description"""
+
+        return next(
+            (item for item in self.items if item.description == description), None
+        )
diff --git a/tests/functional/d/dataclass_with_field.rc b/tests/functional/d/dataclass_with_field.rc
new file mode 100644
index 000000000..a17bb22da
--- /dev/null
+++ b/tests/functional/d/dataclass_with_field.rc
@@ -0,0 +1,2 @@
+[testoptions]
+min_pyver=3.7
diff --git a/tests/functional/d/dataclass_with_field.txt b/tests/functional/d/dataclass_with_field.txt
new file mode 100644
index 000000000..1caf8470a
--- /dev/null
+++ b/tests/functional/d/dataclass_with_field.txt
@@ -0,0 +1 @@
+import-error:7:0::Unable to import 'pydantic.dataclasses':HIGH