cherry-pick-9661-to-release-6.5

pkg/util/comparison.go

@@ -0,0 +1,33 @@
+// Copyright 2023 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package util
+
+import "sort"
+
+// AreStringSlicesEquivalent checks if two string slices are equivalent.
+// If the slices are of the same length and contain the same elements (but possibly in different order), the function returns true.
+// Note: This function does modify the slices. Please be caution of this if you are using it.
+func AreStringSlicesEquivalent(a, b []string) bool {
+	if len(a) != len(b) {
+		return false
+	}
+	sort.Strings(a)
+	sort.Strings(b)
+	for i, v := range a {
+		if v != b[i] {
+			return false
+		}
+	}
+	return true
+}

pkg/util/comparison_test.go

@@ -0,0 +1,61 @@
+// Copyright 2023 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//	http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// See the License for the specific language governing permissions and
+// limitations under the License.
+package util
+
+import (
+	"testing"
+)
+
+func TestAreStringSlicesEquivalent(t *testing.T) {
+	tests := []struct {
+		name string
+		a    []string
+		b    []string
+		want bool
+	}{
+		{
+			name: "equal slices",
+			a:    []string{"foo", "bar", "baz"},
+			b:    []string{"baz", "foo", "bar"},
+			want: true,
+		},
+		{
+			name: "different lengths",
+			a:    []string{"foo", "bar", "baz"},
+			b:    []string{"foo", "bar"},
+			want: false,
+		},
+		{
+			name: "different elements",
+			a:    []string{"foo", "bar", "baz"},
+			b:    []string{"qux", "quux", "corge"},
+			want: false,
+		},
+		{
+			name: "nil elements",
+			a:    []string{},
+			b:    []string{},
+			want: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := AreStringSlicesEquivalent(tt.a, tt.b); got != tt.want {
+				t.Errorf("AreStringSlicesEquivalent() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}
+
+// END: j3d8f4b2j2p9