package copyvoice

import "testing"

func TestNarrativeLensStableForSeed(t *testing.T) {
	a := NarrativeLens("scan-post-1")
	b := NarrativeLens("scan-post-1")
	if a == "" || a != b {
		t.Fatalf("NarrativeLens() = %q, %q", a, b)
	}
}

func TestNarrativeLensDiffersAcrossSeeds(t *testing.T) {
	seen := map[string]struct{}{}
	for _, seed := range []string{"a", "b", "c", "d", "e", "f"} {
		seen[NarrativeLens(seed)] = struct{}{}
	}
	if len(seen) < 2 {
		t.Fatalf("expected varied lenses, got %d", len(seen))
	}
}