1 file changed, 9 insertions, 5 deletions
diff --git a/tests/extensions/test-auth.lua b/tests/extensions/test-auth.lua
index 17cb805..bd1f01c 100644
--- a/tests/extensions/test-auth.lua
+++ b/tests/extensions/test-auth.lua
@@ -247,12 +247,16 @@ h.equals("spaces around a pair are ignored", get_cookie(" foo=1 ;  cgitauth=abc
 h.equals("a cookie value keeps its own equals signs", get_cookie("cgitauth=a=b", "cgitauth"), "a=b")
 
 -- The Cookie header is the visitor's to write, so a run of spaces in it
--- must not cost the square of its length.
+-- must not cost the square of its length. At this length a linear trim
+-- takes about a millisecond and the square about fifteen seconds.
+local spaces = string.rep(" ", 100000)
 local started = os.clock()
-get_cookie("a=" .. string.rep(" ", 20000) .. "b", "cgitauth")
-h.equals("a long run of spaces is read quickly",
-	get_cookie(string.rep(" ", 20000) .. "cgitauth=abc", "cgitauth"), "abc")
-h.check("and in linear time", os.clock() - started < 0.5)
+get_cookie("a=" .. spaces .. "b", "cgitauth")
+h.check("a long run of spaces inside a cookie is read within half a second", os.clock() - started < 0.5)
+started = os.clock()
+local found = get_cookie(spaces .. "cgitauth=abc", "cgitauth")
+h.check("and one ahead of it as well", os.clock() - started < 0.5)
+h.equals("without losing the cookie behind it", found, "abc")
 
 h.check("equal strings compare equal", constant_equals("abc", "abc"))
 h.check("differing strings do not", not constant_equals("abc", "abd"))