From b0e6c50841f9f18285735b3661ba7e770adcb6c0 Mon Sep 17 00:00:00 2001
From: Nikita Sidorov <nikitacrit@mail.ru>
Date: Wed, 15 May 2024 23:25:34 +0300
Subject: [PATCH] IsAny multi error support

---
 markers/markers.go      |  7 +++++++
 markers/markers_test.go | 12 ++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/markers/markers.go b/markers/markers.go
index fa69b0c..3f81794 100644
--- a/markers/markers.go
+++ b/markers/markers.go
@@ -179,6 +179,13 @@ func IsAny(err error, references ...error) bool {
 				return true
 			}
 		}
+
+		// Recursively try multi-error causes, if applicable.
+		for _, me := range errbase.UnwrapMulti(c) {
+			if IsAny(me, references...) {
+				return true
+			}
+		}
 	}
 
 	// Try harder with marks.
diff --git a/markers/markers_test.go b/markers/markers_test.go
index 72dec03..b9cdcf1 100644
--- a/markers/markers_test.go
+++ b/markers/markers_test.go
@@ -361,6 +361,10 @@ func TestIsAny(t *testing.T) {
 	err2 := errors.New("world")
 	err3 := pkgErr.Wrap(err1, "world")
 	err4 := pkgErr.Wrap(err2, "universe")
+	err5 := errors.Join(err1, errors.New("gopher"))
+	err6 := errors.Join(errors.New("gopher"), err2)
+	err7 := errors.Join(err1, err2)
+	err8 := pkgErr.Wrap(err7, "gopher")
 	var nilErr error
 
 	tt.Check(markers.IsAny(err1, err1))
@@ -371,6 +375,14 @@ func TestIsAny(t *testing.T) {
 	tt.Check(markers.IsAny(err3, err2, nilErr, err1))
 	tt.Check(markers.IsAny(nilErr, err2, nilErr, err1))
 	tt.Check(!markers.IsAny(nilErr, err2, err1))
+	tt.Check(markers.IsAny(err5, err1))
+	tt.Check(markers.IsAny(err6, err2))
+	tt.Check(markers.IsAny(err7, err1))
+	tt.Check(markers.IsAny(err7, err2))
+	tt.Check(markers.IsAny(err7, err1, err2))
+	tt.Check(markers.IsAny(err8, err1))
+	tt.Check(markers.IsAny(err8, err2))
+	tt.Check(markers.IsAny(err8, err1, err2))
 }
 
 // This test demonstrates that two errors that are structurally