feat: add protocol and reconciliation decisions

internal/domain/protocol_test.go

@@ -0,0 +1,29 @@
+package domain
+
+import (
+	"errors"
+	"testing"
+
+	rvboxv1 "github.com/rvbox/rvbox/gen/go/rvbox/v1"
+)
+
+func TestSelectHighestCompatibleProtocol_HP_SES_01(t *testing.T) {
+	t.Parallel()
+
+	version, err := SelectProtocol(&rvboxv1.ProtocolRange{Major: 1, MinMinor: 1, MaxMinor: 5}, &rvboxv1.ProtocolRange{Major: 1, MinMinor: 3, MaxMinor: 7})
+	if err != nil || version.Major != 1 || version.Minor != 5 {
+		t.Fatalf("SelectProtocol() = (%+v, %v)", version, err)
+	}
+	for _, ranges := range [][2]*rvboxv1.ProtocolRange{
+		{{Major: 1, MinMinor: 1, MaxMinor: 2}, {Major: 2, MinMinor: 1, MaxMinor: 2}},
+		{{Major: 1, MinMinor: 3, MaxMinor: 2}, {Major: 1, MinMinor: 1, MaxMinor: 2}},
+		{{Major: 1, MinMinor: 1, MaxMinor: 2}, {Major: 1, MinMinor: 3, MaxMinor: 4}},
+	} {
+		if _, err := SelectProtocol(ranges[0], ranges[1]); !errors.Is(err, ErrNoCompatibleProtocol) {
+			t.Errorf("SelectProtocol(%+v, %+v) error = %v", ranges[0], ranges[1], err)
+		}
+	}
+	if _, err := SelectProtocol(nil, &rvboxv1.ProtocolRange{Major: 1}); !errors.Is(err, ErrNoCompatibleProtocol) {
+		t.Fatalf("nil protocol range error = %v", err)
+	}
+}