Extend unittest coverage in util

util/set_test.go

@@ -0,0 +1,65 @@
+// This file is Free Software under the Apache-2.0 License
+// without warranty, see README.md and LICENSES/Apache-2.0.txt for details.
+//
+// SPDX-License-Identifier: Apache-2.0
+//
+// SPDX-FileCopyrightText: 2022 German Federal Office for Information Security (BSI) <https://www.bsi.bund.de>
+// Software-Engineering: 2022 Intevation GmbH <https://intevation.de>
+
+package util
+
+import (
+	"reflect"
+	"sort"
+	"testing"
+)
+
+func TestSet(t *testing.T) {
+	s := Set[int]{}
+	if s.Contains(0) {
+		t.Error("Set.Contains: Expected false got true")
+	}
+	s.Add(0)
+	if !s.Contains(0) {
+		t.Error("Set.Contains: Expected true got false")
+	}
+
+	s0 := Set[int]{}
+	s1 := Set[int]{}
+
+	s0.Add(0)
+	s0.Add(1)
+
+	s1.Add(0)
+	s1.Add(1)
+	s1.Add(2)
+
+	diff0 := s0.Difference(s1)
+	diff1 := s1.Difference(s0)
+
+	if reflect.DeepEqual(diff0, diff1) {
+		t.Errorf("Set.Difference: %q and %q are different", diff0, diff1)
+	}
+
+	if s0.ContainsAll(s1) {
+		t.Error("Set.ContainsAll: Expected false got true")
+	}
+
+	if !s1.ContainsAll(s0) {
+		t.Error("Set.ContainsAll: Expected true got false")
+	}
+
+	s2 := Set[int]{}
+	s2.Add(0)
+	s2.Add(1)
+	s2.Add(2)
+	s2.Add(3)
+
+	wantKeys := []int{0, 1, 2, 3}
+	gotKeys := s2.Keys()
+	sort.Ints(gotKeys)
+
+	if !reflect.DeepEqual(wantKeys, gotKeys) {
+		t.Errorf("Set.Keys: Expected %q got %q", wantKeys, gotKeys)
+	}
+}