From e458448ee418e10cf28a089704dc42ba3c8aca37 Mon Sep 17 00:00:00 2001
From: Hynek Schlawack <hs@ox.cx>
Date: Wed, 30 Nov 2022 16:04:57 +0100
Subject: [PATCH] pyright: add aliasing test (#1063)

---
 tests/dataclass_transform_example.py | 12 ++++++++++++
 tests/test_pyright.py                |  6 +++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/tests/dataclass_transform_example.py b/tests/dataclass_transform_example.py
index 49e09061..af09e8a5 100644
--- a/tests/dataclass_transform_example.py
+++ b/tests/dataclass_transform_example.py
@@ -1,6 +1,7 @@
 # SPDX-License-Identifier: MIT
 
 import attr
+import attrs
 
 
 @attr.define()
@@ -43,3 +44,14 @@ d2 = FrozenDefine("a")
 d2.a = "new"
 
 reveal_type(d2.a)  # noqa
+
+
+# Field-aliasing works
+@attrs.define
+class AliasedField:
+    _a: int = attrs.field(alias="_a")
+
+
+af = AliasedField(42)
+
+reveal_type(af.__init__)  # noqa
diff --git a/tests/test_pyright.py b/tests/test_pyright.py
index 44b30890..98f5038b 100644
--- a/tests/test_pyright.py
+++ b/tests/test_pyright.py
@@ -75,9 +75,13 @@ def test_pyright_baseline():
             severity="information",
             message='Type of "d2.a" is "Literal[\'new\']"',
         ),
+        PyrightDiagnostic(
+            severity="information",
+            message='Type of "af.__init__" is "(_a: int) -> None"',
+        ),
     }
 
-    assert diagnostics == expected_diagnostics
+    assert expected_diagnostics == diagnostics
 
 
 def test_pyright_attrsinstance_compat(tmp_path):