From ad6d7080ce202434d7dda267b33aabf95091a2cb Mon Sep 17 00:00:00 2001
From: Daniel Stenberg <daniel@haxx.se>
Date: Wed, 24 Jun 2020 15:24:35 +0200
Subject: test543: extended to verify zero length input

As was reported in #5601
---
 tests/data/test543     |  2 ++
 tests/libtest/lib543.c | 14 ++++++++++++--
 2 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/tests/data/test543 b/tests/data/test543
index 455633037..f7e687c46 100644
--- a/tests/data/test543
+++ b/tests/data/test543
@@ -30,6 +30,8 @@ curl_easy_escape
 <verify>
 <stdout>
 %9C%26K%3DI%04%A1%01%E0%D8%7C%20%B7%EFS%29%FA%1DW%E1
+IN: '' OUT: ''
+IN: ' 12' OUT: '%2012'
 </stdout>
 </verify>
 </testcase>
diff --git a/tests/libtest/lib543.c b/tests/libtest/lib543.c
index 5fe5cd1ce..c494d3d83 100644
--- a/tests/libtest/lib543.c
+++ b/tests/libtest/lib543.c
@@ -49,11 +49,21 @@ int test(char *URL)
 
   s = curl_easy_escape(easy, (const char *)a, asize);
 
-  if(s)
+  if(s) {
     printf("%s\n", s);
+    curl_free(s);
+  }
 
-  if(s)
+  s = curl_easy_escape(easy, "", 0);
+  if(s) {
+    printf("IN: '' OUT: '%s'\n", s);
     curl_free(s);
+  }
+  s = curl_easy_escape(easy, " 123", 3);
+  if(s) {
+    printf("IN: ' 12' OUT: '%s'\n", s);
+    curl_free(s);
+  }
 
   curl_easy_cleanup(easy);
   curl_global_cleanup();
-- 
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