From c372312bd610175b68795eef7b4a0dedf711316d Mon Sep 17 00:00:00 2001
From: Wessel Bruinsma <wessel.p.bruinsma@gmail.com>
Date: Mon, 25 Mar 2024 20:31:45 +0100
Subject: [PATCH] Test that `conversion_method` returns the function

---
 tests/test_promotion.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tests/test_promotion.py b/tests/test_promotion.py
index 460bcbb9..ed73c0f7 100644
--- a/tests/test_promotion.py
+++ b/tests/test_promotion.py
@@ -50,6 +50,9 @@ def num_to_fp(x):
     assert convert(r, Num) == r
     assert convert(r, Rat) == 3.0
 
+    # Test that `conversion_method` returns the function.
+    assert num_to_fp(1) == 3.0
+
 
 def test_convert_resolve_type_hints(convert):
     add_conversion_method(int, float, lambda x: 2.0)