From 5c98bc09a8f2d9d9094d4425f93c265dcf6c83e5 Mon Sep 17 00:00:00 2001 From: Steffen Deusch Date: Thu, 17 Apr 2025 11:37:31 +0200 Subject: [PATCH] https://github.com/elixir-lang/elixir/pull/14448 --- test/stdlib/string_test.exs | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/test/stdlib/string_test.exs b/test/stdlib/string_test.exs index 375d709..238fbd0 100644 --- a/test/stdlib/string_test.exs +++ b/test/stdlib/string_test.exs @@ -25,4 +25,15 @@ defmodule StreamData.StringTest do end end end + + if Version.match?(System.version(), "~> 1.19.0-dev") do + # From https://github.com/elixir-lang/elixir/pull/14448. + property "String.count_matches/2 is equivalent to String.split/1 + Kernel.length/1 - 1" do + check all string <- string(:printable), + pattern <- string(:printable) do + assert String.count_matches(string, pattern) == + string |> String.split(pattern) |> Kernel.length() |> Kernel.-(1) + end + end + end end