feat: add initial implementation of osiris, the TLS terminator for Anubis

Signed-off-by: Xe Iaso <me@xeiaso.net>

cmd/osiris/internal/config/bind_test.go

@@ -0,0 +1,55 @@
+package config
+
+import (
+	"errors"
+	"net"
+	"testing"
+)
+
+func TestBindValid(t *testing.T) {
+	for _, tt := range []struct {
+		name         string
+		precondition func(t *testing.T)
+		bind         Bind
+		err          error
+	}{
+		{
+			name:         "basic",
+			precondition: nil,
+			bind: Bind{
+				HTTP:    ":8081",
+				HTTPS:   ":8082",
+				Metrics: ":8083",
+			},
+			err: nil,
+		},
+		{
+			name: "reused ports",
+			precondition: func(t *testing.T) {
+				ln, err := net.Listen("tcp", ":8081")
+				if err != nil {
+					t.Fatal(err)
+				}
+				t.Cleanup(func() { ln.Close() })
+			},
+			bind: Bind{
+				HTTP:    ":8081",
+				HTTPS:   ":8081",
+				Metrics: ":8081",
+			},
+			err: ErrCantBindToPort,
+		},
+	} {
+		t.Run(tt.name, func(t *testing.T) {
+			if tt.precondition != nil {
+				tt.precondition(t)
+			}
+
+			if err := tt.bind.Valid(); !errors.Is(err, tt.err) {
+				t.Logf("want: %v", tt.err)
+				t.Logf("got:  %v", err)
+				t.Error("got wrong error from validation function")
+			}
+		})
+	}
+}