Add T.AssertErrorAs

1 files changed, 10 insertions, 0 deletions

diff --git a/testing.go b/testing.go
index c8bd66a..2b91a72 100644
--- a/testing.go
+++ b/testing.go
@@ -40,6 +40,16 @@ func (t *T) AssertEqual(exp, actual any) bool {
 	return false
 }
 
+func (t *T) AssertErrorAs(target any, err error) bool {
+	t.Helper()
+
+	if errors.As(err, target) {
+		return true
+	}
+	t.Errorf("\nexpected error chain to contain %#v, got %#v", target, err)
+	return false
+}
+
 func (t *T) AssertErrorIs(target, err error) bool {
 	t.Helper()