# HG changeset patch
# User Matthew Wild <mwild1@gmail.com>
# Date 1779716466 -3600
# Node ID 2bcabbeac9b074780527a4b49a8911cf90cd3111
# Parent  721823e085ecb7c8d8b477c48a9e408ff85f6ff6
util.ringbuffer: Fix incorrect returned position from :find() for #needle~=1

And add a test for :find()

diff -r 721823e085ec -r 2bcabbeac9b0 spec/util_ringbuffer_spec.lua
--- a/spec/util_ringbuffer_spec.lua	Mon May 25 13:29:28 2026 +0100
+++ b/spec/util_ringbuffer_spec.lua	Mon May 25 14:41:06 2026 +0100
@@ -35,6 +35,22 @@
 		end);
 	end);
 
+	describe(":find", function ()
+		local function test_find(b, str, expected)
+			if expected ~= nil then
+				assert.equal(expected, b:find(str));
+			else
+				assert.is_nil(b:find(str));
+			end
+		end
+
+		it("works", function ()
+			local b = rb.new();
+			assert.truthy(b:write("hello world"));
+			test_find(b, "world", 7);
+		end);
+	end);
+
 	describe(":sub", function ()
 		-- Helper function to compare buffer:sub() with string:sub()
 		local function test_sub(b, x, y)
diff -r 721823e085ec -r 2bcabbeac9b0 util-src/ringbuffer.c
--- a/util-src/ringbuffer.c	Mon May 25 13:29:28 2026 +0100
+++ b/util-src/ringbuffer.c	Mon May 25 14:41:06 2026 +0100
@@ -99,7 +99,7 @@
 				}
 
 			if(m) {
-				return i + l;
+				return i + 1;
 			}
 		}
 	}