From 05de7802192158e37562c8fd47467033f6a04972 Mon Sep 17 00:00:00 2001
From: yuyi <yuyi98@163.com>
Date: Sun, 28 Jun 2020 19:34:59 +0800
Subject: [PATCH] map: add map['aa']+='str' test

---
 vlib/builtin/map_test.v | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/vlib/builtin/map_test.v b/vlib/builtin/map_test.v
index 5e125523e7..7859b5d08a 100644
--- a/vlib/builtin/map_test.v
+++ b/vlib/builtin/map_test.v
@@ -283,3 +283,10 @@ fn test_map_in_directly() {
 		assert v == 1
 	}
 }
+
+fn test_plus_assign_string() {
+	mut m := {'one': ''}
+	m['one'] += '1'
+	assert m.len == 1
+	assert m['one'] == '1'
+}