From 064fe18de61c2aae5c215077ba1dd0352affa271 Mon Sep 17 00:00:00 2001
From: n5m <72841454+n5m@users.noreply.github.com>
Date: Mon, 31 May 2021 09:20:15 +0000
Subject: improve fast returns of find and rfind (#18127)

---
 tests/stdlib/tstrutils.nim | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'tests/stdlib/tstrutils.nim')

diff --git a/tests/stdlib/tstrutils.nim b/tests/stdlib/tstrutils.nim
index 771dddcaf..637661ba3 100644
--- a/tests/stdlib/tstrutils.nim
+++ b/tests/stdlib/tstrutils.nim
@@ -243,6 +243,34 @@ template main() =
     doAssert "/1/2/3".rfind('/', last=1) == 0
     doAssert "/1/2/3".rfind('0') == -1
 
+    block:
+      const haystack: string = "ABCABABABABCAB"
+      doAssert haystack.len == 14
+      doAssert haystack.rfind("ABC") == 9
+      doAssert haystack.rfind("ABC", last=13) == 9
+      doAssert haystack.rfind("ABC", last=12) == 9
+      doAssert haystack.rfind("ABC", last=11) == 9
+      doAssert haystack.rfind("ABC", last=10) == 0
+
+      doAssert haystack.rfind("ABC", start=0) == 9
+      doAssert haystack.rfind("ABC", start=1) == 9
+      doAssert haystack.rfind("ABC", start=2) == 9
+      doAssert haystack.rfind("ABC", start=9) == 9
+      doAssert haystack.rfind("ABC", start=10) == -1
+      doAssert haystack.rfind("ABC", start=11) == -1
+      doAssert haystack.rfind("ABC", start=12) == -1
+
+      doAssert haystack.rfind("ABC", start=0, last=13) == 9
+      doAssert haystack.rfind("ABC", start=0, last=12) == 9
+      doAssert haystack.rfind("ABC", start=0, last=11) == 9
+      doAssert haystack.rfind("ABC", start=0, last=10) == 0
+      doAssert haystack.rfind("ABC", start=1, last=10) == -1
+
+    doAssert "".rfind("/") == -1
+    doAssert "/".rfind("/") == 0
+    doAssert "/".rfind("//") == -1
+    doAssert "///".rfind("//", start=3) == -1
+
   block: # trimZeros
     var x = "1200"
     x.trimZeros()
-- 
cgit 1.4.1-2-gfad0