added full URL for listening server

2026-07-10 07:09:55 +02:00
parent ceb9d0d30b
commit 330fbec53c
2 changed files with 256 additions and 1 deletions
--- a/internal/app/app_test.go
+++ b/internal/app/app_test.go
@ -0,0 +1,122 @@
+package app
+
+import (
+	"errors"
+	"net"
+	"reflect"
+	"testing"
+)
+
+func TestServerURLsForWildcardAddr(t *testing.T) {
+	urls, err := serverURLsWithLocalIPv4Addrs(":8080", func() ([]string, error) {
+		return []string{
+			"192.168.1.100",
+			"127.0.0.1",
+			"192.168.1.100",
+			"10.0.0.2",
+		}, nil
+	})
+	if err != nil {
+		t.Fatalf("serverURLsWithLocalIPv4Addrs returned error: %v", err)
+	}
+
+	want := []string{
+		"http://localhost:8080",
+		"http://127.0.0.1:8080",
+		"http://192.168.1.100:8080",
+		"http://10.0.0.2:8080",
+	}
+	if !reflect.DeepEqual(urls, want) {
+		t.Fatalf("urls = %#v, want %#v", urls, want)
+	}
+}
+
+func TestServerURLsForZeroIPv4Addr(t *testing.T) {
+	urls, err := serverURLsWithLocalIPv4Addrs("0.0.0.0:8080", func() ([]string, error) {
+		return []string{"192.168.1.100"}, nil
+	})
+	if err != nil {
+		t.Fatalf("serverURLsWithLocalIPv4Addrs returned error: %v", err)
+	}
+
+	want := []string{
+		"http://localhost:8080",
+		"http://127.0.0.1:8080",
+		"http://192.168.1.100:8080",
+	}
+	if !reflect.DeepEqual(urls, want) {
+		t.Fatalf("urls = %#v, want %#v", urls, want)
+	}
+}
+
+func TestServerURLsForSpecificIPv4Addr(t *testing.T) {
+	urls, err := serverURLsWithLocalIPv4Addrs("192.168.1.100:8080", func() ([]string, error) {
+		t.Fatal("local IPv4 addrs should not be discovered for a specific bind address")
+		return nil, nil
+	})
+	if err != nil {
+		t.Fatalf("serverURLsWithLocalIPv4Addrs returned error: %v", err)
+	}
+
+	want := []string{"http://192.168.1.100:8080"}
+	if !reflect.DeepEqual(urls, want) {
+		t.Fatalf("urls = %#v, want %#v", urls, want)
+	}
+}
+
+func TestServerURLsForLocalhostAddr(t *testing.T) {
+	urls, err := serverURLsWithLocalIPv4Addrs("localhost:8080", func() ([]string, error) {
+		t.Fatal("local IPv4 addrs should not be discovered for a hostname bind address")
+		return nil, nil
+	})
+	if err != nil {
+		t.Fatalf("serverURLsWithLocalIPv4Addrs returned error: %v", err)
+	}
+
+	want := []string{"http://localhost:8080"}
+	if !reflect.DeepEqual(urls, want) {
+		t.Fatalf("urls = %#v, want %#v", urls, want)
+	}
+}
+
+func TestServerURLsReturnsFallbackURLsWhenDiscoveryFails(t *testing.T) {
+	wantErr := errors.New("interfaces unavailable")
+	urls, err := serverURLsWithLocalIPv4Addrs(":8080", func() ([]string, error) {
+		return nil, wantErr
+	})
+	if !errors.Is(err, wantErr) {
+		t.Fatalf("serverURLsWithLocalIPv4Addrs error = %v, want %v", err, wantErr)
+	}
+
+	want := []string{
+		"http://localhost:8080",
+		"http://127.0.0.1:8080",
+	}
+	if !reflect.DeepEqual(urls, want) {
+		t.Fatalf("urls = %#v, want %#v", urls, want)
+	}
+}
+
+func TestIsUsableLocalIPv4(t *testing.T) {
+	tests := []struct {
+		name string
+		ip   net.IP
+		want bool
+	}{
+		{name: "private", ip: net.ParseIP("192.168.1.100"), want: true},
+		{name: "zero", ip: net.ParseIP("0.0.0.0"), want: false},
+		{name: "loopback", ip: net.ParseIP("127.0.0.1"), want: false},
+		{name: "ipv6", ip: net.ParseIP("2001:db8::1"), want: false},
+		{name: "multicast", ip: net.ParseIP("224.0.0.1"), want: false},
+		{name: "link local", ip: net.ParseIP("169.254.1.2"), want: false},
+		{name: "nil", ip: nil, want: false},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isUsableLocalIPv4(tt.ip); got != tt.want {
+				t.Fatalf("isUsableLocalIPv4(%v) = %v, want %v", tt.ip, got, tt.want)
+			}
+		})
+	}
+}