istio

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// Copyright Istio Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package config
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import (
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	"net"
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	"net/netip"
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	"testing"
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)
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var tesrLocalIPAddrs = func(ips []netip.Addr) ([]net.Addr, error) {
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	var IPAddrs []net.Addr
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	for i := 0; i < len(ips); i++ {
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		var ipAddr net.Addr
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		ipNetAddr := &net.IPNet{IP: net.ParseIP(ips[i].String())}
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		ipAddr = ipNetAddr
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		IPAddrs = append(IPAddrs, ipAddr)
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	}
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	return IPAddrs, nil
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}
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func TestGetLocalIP(t *testing.T) {
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	tests := []struct {
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		name     string
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		lipas    func() ([]net.Addr, error)
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		isDS     bool
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		expected bool
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	}{
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		{
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			name: "ipv4 only local ip addresses",
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			lipas: func() ([]net.Addr, error) {
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				return tesrLocalIPAddrs([]netip.Addr{
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					netip.MustParseAddr("127.0.0.1"),
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					netip.MustParseAddr("1.2.3.5"),
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				})
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			},
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			isDS:     false,
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			expected: false,
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		},
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		{
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			name: "ipv6 only local ip addresses",
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			lipas: func() ([]net.Addr, error) {
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				return tesrLocalIPAddrs([]netip.Addr{
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					netip.MustParseAddr("::1"),
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					netip.MustParseAddr("2222:3333::1"),
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				})
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			},
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			isDS:     false,
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			expected: true,
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		},
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		{
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			name: "mixed ipv4 and ipv6 local ip addresses",
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			lipas: func() ([]net.Addr, error) {
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				return tesrLocalIPAddrs([]netip.Addr{
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					netip.MustParseAddr("::1"),
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					netip.MustParseAddr("127.0.0.1"),
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					netip.MustParseAddr("1.2.3.5"),
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					netip.MustParseAddr("2222:3333::1"),
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				})
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			},
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			isDS:     false,
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			expected: false,
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		},
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		{
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			name: "mixed ipv4 and ipv6 local ip addresses with dual stack enable",
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			lipas: func() ([]net.Addr, error) {
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				return tesrLocalIPAddrs([]netip.Addr{
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					netip.MustParseAddr("::1"),
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					netip.MustParseAddr("127.0.0.1"),
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					netip.MustParseAddr("1.2.3.5"),
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					netip.MustParseAddr("2222:3333::1"),
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				})
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			},
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			isDS:     true,
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			expected: true,
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		},
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	}
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	for _, tt := range tests {
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		t.Run(tt.name, func(t *testing.T) {
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			LocalIPAddrs = tt.lipas
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			_, isV6, err := getLocalIP(tt.isDS)
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			if err != nil {
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				t.Errorf("getLocalIP err: %s", err)
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			}
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			if isV6 != tt.expected {
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				t.Errorf("unexpected EnableInboundIPv6 result, expected: %t got: %t", tt.expected, isV6)
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			}
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		})
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	}
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}
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