1 files changed, 63 insertions, 0 deletions
diff --git a/internal/testhelpers/assert/assert.go b/internal/testhelpers/assert/assert.go
new file mode 100644
index 0000000..6e641ca
--- /dev/null
+++ b/internal/testhelpers/assert/assert.go
@@ -0,0 +1,63 @@
+// SPDX-FileCopyrightText: 2026 Stefan Majewsky <majewsky@gmx.net>
+// SPDX-License-Identifier: Apache-2.0
+
+package assert
+
+import (
+	"cmp"
+	"errors"
+	"reflect"
+	"testing"
+)
+
+// Equal is a test assertion.
+func Equal[V comparable](t testing.TB, actual, expected V) {
+	t.Helper()
+	if actual != expected {
+		t.Errorf("expected %#v", expected)
+		t.Errorf(" but got %#v", actual)
+	}
+}
+
+// DeepEqual is a test assertion.
+func DeepEqual[V any](t testing.TB, actual, expected V) {
+	t.Helper()
+	if !reflect.DeepEqual(actual, expected) {
+		t.Errorf("expected %#v", expected)
+		t.Errorf(" but got %#v", actual)
+	}
+}
+
+// ErrEqual is a test assertion.
+func ErrEqual(t testing.TB, actual error, expected string) {
+	t.Helper()
+	Equal(t, cmp.Or(actual, errors.New("<success>")).Error(), expected)
+}
+
+// SliceEqual is a test assertion.
+func SliceEqual[V comparable](t testing.TB, actual []V, expected ...V) {
+	t.Helper()
+	if len(actual) != len(expected) {
+		t.Errorf("length mismatch: expected %#v, but got %#v", expected, actual)
+	}
+	for idx := range actual {
+		if actual[idx] != expected[idx] {
+			t.Errorf("element %d: expected %#v", idx, expected[idx])
+			t.Errorf("element %d:  but got %#v", idx, actual[idx])
+		}
+	}
+}
+
+// SliceDeepEqual is a test assertion.
+func SliceDeepEqual[V any](t testing.TB, actual []V, expected ...V) {
+	t.Helper()
+	if len(actual) != len(expected) {
+		t.Errorf("length mismatch: expected %#v, but got %#v", expected, actual)
+	}
+	for idx := range actual {
+		if !reflect.DeepEqual(actual[idx], expected[idx]) {
+			t.Errorf("element %d: expected %#v", idx, expected[idx])
+			t.Errorf("element %d:  but got %#v", idx, actual[idx])
+		}
+	}
+}