From c1a06bd56ed78406a52d1b45cfe18b61ea8d7520 Mon Sep 17 00:00:00 2001
From: flywind <43030857+xflywind@users.noreply.github.com>
Date: Fri, 19 Feb 2021 04:36:35 -0600
Subject: [PATCH]  close #13859; add testcase (#17099)

* fix js unsigned integer

* better

* close #13859; add testcase
---
 tests/stdlib/tcstring.nim | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)
 create mode 100644 tests/stdlib/tcstring.nim

diff --git a/tests/stdlib/tcstring.nim b/tests/stdlib/tcstring.nim
new file mode 100644
index 0000000000..2999251190
--- /dev/null
+++ b/tests/stdlib/tcstring.nim
@@ -0,0 +1,19 @@
+discard """
+  targets: "c cpp js"
+"""
+
+
+block: # bug #13859
+  let str = "abc".cstring
+  doAssert len(str).int8 == 3
+  doAssert len(str).int16 == 3
+  doAssert len(str).int32 == 3
+  var str2 = "cde".cstring
+  doAssert len(str2).int8 == 3
+  doAssert len(str2).int16 == 3
+  doAssert len(str2).int32 == 3
+
+  const str3 = "abc".cstring
+  doAssert len(str3).int32 == 3
+  doAssert len("abc".cstring).int16 == 3
+  doAssert len("abc".cstring).float32 == 3.0