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common_test.go
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package main
import (
"net"
"testing"
)
func TestParseTargetString(t *testing.T) {
tests := []struct {
name string
input string
wantListenPort int
wantTargetAddr string
wantErr bool
}{
// IPv4 test cases
{
name: "valid IPv4 basic",
input: "3001:192.168.1.1:80",
wantListenPort: 3001,
wantTargetAddr: "192.168.1.1:80",
wantErr: false,
},
{
name: "valid IPv4 localhost",
input: "8080:127.0.0.1:3000",
wantListenPort: 8080,
wantTargetAddr: "127.0.0.1:3000",
wantErr: false,
},
{
name: "valid IPv4 same ports",
input: "443:10.0.0.1:443",
wantListenPort: 443,
wantTargetAddr: "10.0.0.1:443",
wantErr: false,
},
// IPv6 test cases
{
name: "valid IPv6 loopback",
input: "3001:[::1]:8080",
wantListenPort: 3001,
wantTargetAddr: "[::1]:8080",
wantErr: false,
},
{
name: "valid IPv6 full address",
input: "80:[fd70:1452:b736:4dd5:caca:7db9:c588:f5b3]:8080",
wantListenPort: 80,
wantTargetAddr: "[fd70:1452:b736:4dd5:caca:7db9:c588:f5b3]:8080",
wantErr: false,
},
{
name: "valid IPv6 link-local",
input: "443:[fe80::1]:443",
wantListenPort: 443,
wantTargetAddr: "[fe80::1]:443",
wantErr: false,
},
{
name: "valid IPv6 all zeros compressed",
input: "8000:[::]:9000",
wantListenPort: 8000,
wantTargetAddr: "[::]:9000",
wantErr: false,
},
{
name: "valid IPv6 mixed notation",
input: "5000:[::ffff:192.168.1.1]:6000",
wantListenPort: 5000,
wantTargetAddr: "[::ffff:192.168.1.1]:6000",
wantErr: false,
},
// Hostname test cases
{
name: "valid hostname",
input: "8080:example.com:80",
wantListenPort: 8080,
wantTargetAddr: "example.com:80",
wantErr: false,
},
{
name: "valid hostname with subdomain",
input: "443:api.example.com:8443",
wantListenPort: 443,
wantTargetAddr: "api.example.com:8443",
wantErr: false,
},
{
name: "valid localhost hostname",
input: "3000:localhost:3000",
wantListenPort: 3000,
wantTargetAddr: "localhost:3000",
wantErr: false,
},
// Error cases
{
name: "invalid - no colons",
input: "invalid",
wantErr: true,
},
{
name: "invalid - empty string",
input: "",
wantErr: true,
},
{
name: "invalid - non-numeric listen port",
input: "abc:192.168.1.1:80",
wantErr: true,
},
{
name: "invalid - missing target port",
input: "3001:192.168.1.1",
wantErr: true,
},
{
name: "invalid - IPv6 without brackets",
input: "3001:fd70:1452:b736:4dd5:caca:7db9:c588:f5b3:80",
wantErr: true,
},
{
name: "invalid - only listen port",
input: "3001:",
wantErr: true,
},
{
name: "invalid - missing host",
input: "3001::80",
wantErr: true,
},
{
name: "invalid - IPv6 unclosed bracket",
input: "3001:[::1:80",
wantErr: true,
},
{
name: "invalid - listen port zero",
input: "0:192.168.1.1:80",
wantErr: true,
},
{
name: "invalid - listen port negative",
input: "-1:192.168.1.1:80",
wantErr: true,
},
{
name: "invalid - listen port out of range",
input: "70000:192.168.1.1:80",
wantErr: true,
},
{
name: "invalid - empty target port",
input: "3001:192.168.1.1:",
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
listenPort, targetAddr, err := parseTargetString(tt.input)
if (err != nil) != tt.wantErr {
t.Errorf("parseTargetString(%q) error = %v, wantErr %v", tt.input, err, tt.wantErr)
return
}
if tt.wantErr {
return // Don't check other values if we expected an error
}
if listenPort != tt.wantListenPort {
t.Errorf("parseTargetString(%q) listenPort = %d, want %d", tt.input, listenPort, tt.wantListenPort)
}
if targetAddr != tt.wantTargetAddr {
t.Errorf("parseTargetString(%q) targetAddr = %q, want %q", tt.input, targetAddr, tt.wantTargetAddr)
}
})
}
}
// TestParseTargetStringNetDialCompatibility verifies that the output is compatible with net.Dial
func TestParseTargetStringNetDialCompatibility(t *testing.T) {
tests := []struct {
name string
input string
}{
{"IPv4", "8080:127.0.0.1:80"},
{"IPv6 loopback", "8080:[::1]:80"},
{"IPv6 full", "8080:[2001:db8::1]:80"},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
_, targetAddr, err := parseTargetString(tt.input)
if err != nil {
t.Fatalf("parseTargetString(%q) unexpected error: %v", tt.input, err)
}
// Verify the format is valid for net.Dial by checking it can be split back
// This doesn't actually dial, just validates the format
_, _, err = net.SplitHostPort(targetAddr)
if err != nil {
t.Errorf("parseTargetString(%q) produced invalid net.Dial format %q: %v", tt.input, targetAddr, err)
}
})
}
}