From 527e1c03b7f8523ca9de50612b3db5b5ef9d4af8 Mon Sep 17 00:00:00 2001
From: Alexander Medvednikov <alexander@medvednikov.com>
Date: Thu, 26 Feb 2026 11:31:32 +0300
Subject: [PATCH] checker: fix enum variant equality test is not commutative
 (fixes #10331)

---
 .../enums/enum_short_infix_commutative_test.v | 34 +++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 vlib/v/tests/enums/enum_short_infix_commutative_test.v

diff --git a/vlib/v/tests/enums/enum_short_infix_commutative_test.v b/vlib/v/tests/enums/enum_short_infix_commutative_test.v
new file mode 100644
index 000000000..972e4b3a6
--- /dev/null
+++ b/vlib/v/tests/enums/enum_short_infix_commutative_test.v
@@ -0,0 +1,34 @@
+enum EnumCommutative {
+	a
+	b
+}
+
+fn short_eq_left(x EnumCommutative) bool {
+	return .a == x
+}
+
+fn short_eq_right(x EnumCommutative) bool {
+	return x == .a
+}
+
+fn short_ne_left(x EnumCommutative) bool {
+	return .a != x
+}
+
+fn short_ne_right(x EnumCommutative) bool {
+	return x != .a
+}
+
+fn test_short_enum_infix_equality_is_commutative() {
+	assert short_eq_left(.a)
+	assert short_eq_right(.a)
+	assert !short_eq_left(.b)
+	assert !short_eq_right(.b)
+}
+
+fn test_short_enum_infix_inequality_is_commutative() {
+	assert !short_ne_left(.a)
+	assert !short_ne_right(.a)
+	assert short_ne_left(.b)
+	assert short_ne_right(.b)
+}
-- 
2.39.5