package release_test

import (
	"strings"
	"testing"

	"github.com/carlosframework/platform/internal/release"
)

// canary -> stable is the jump that would make the ladder decorative: it is
// exactly what a production app parked on a migration canary channel would do
// if nothing stopped it.
func TestCanaryToStableIsRefused(t *testing.T) {
	err := release.PromotionAllowed(release.RungCanary, release.RungStable)
	if err == nil {
		t.Fatal("canary -> stable was ALLOWED — the ladder is decorative")
	}
	if !strings.Contains(err.Error(), "-hotfix") {
		t.Errorf("refusal %q does not name --hotfix", err)
	}
	t.Logf("refusal: %v", err)
	// And the same jump for beta, for completeness.
	if release.PromotionAllowed(release.RungCanary, release.RungBeta) == nil {
		t.Error("canary -> beta was allowed")
	}
}