1 files changed, 35 insertions, 0 deletions
diff --git a/internal/casino/house_edge_test.go b/internal/casino/house_edge_test.go
index 5f75e44..0704edc 100644
--- a/internal/casino/house_edge_test.go
+++ b/internal/casino/house_edge_test.go
@@ -108,6 +108,41 @@ func TestUnrecognizedTargetNeverInherits(t *testing.T) {
 	}
 }
 
+// TestCrapsGroupedTargetsHaveRTP: the list names grouped rows (4/10, buy <n>,
+// odds pass / come). Each must resolve to a real edge, not the unknown dash.
+func TestCrapsGroupedTargetsHaveRTP(t *testing.T) {
+	for _, bet := range []string{
+		"place 4/10", "place 5/9", "place 6/8",
+		"hard 4/10", "hard 6/8",
+		"odds pass / come", "odds dont <n>",
+		"buy <n>", "lay <n>",
+	} {
+		got := (TableConfig{Game: GameCraps}).HouseEdge(bet)
+		if len(got.Parts) == 0 {
+			t.Fatalf("%s has no RTP: %s", bet, got.Note)
+		}
+	}
+	crapless := TableConfig{Game: GameCraps, Craps: CrapsConfig{Variant: "crapless"}}
+	for _, bet := range []string{"place 2/12", "place 3/11"} {
+		got := crapless.HouseEdge(bet)
+		if len(got.Parts) == 0 {
+			t.Fatalf("crapless %s has no RTP: %s", bet, got.Note)
+		}
+	}
+	// The <n> rows expand to every legal number, including the crapless extras.
+	for _, want := range []string{"2", "3", "11", "12"} {
+		found := false
+		for _, part := range crapless.HouseEdge("lay <n>").Parts {
+			if part.Label == want {
+				found = true
+			}
+		}
+		if !found {
+			t.Fatalf("crapless lay <n> missing number %s", want)
+		}
+	}
+}
+
 // TestHopBetsTwoParts pins the split hop analysis (easy vs doubles).
 func TestHopBetsTwoParts(t *testing.T) {
 	got := (TableConfig{Game: GameCraps}).HouseEdge("hop <a> <b>")