1 files changed, 41 insertions, 0 deletions
diff --git a/internal/game/render_felt_precision_test.go b/internal/game/render_felt_precision_test.go
new file mode 100644
index 0000000..da96d71
--- /dev/null
+++ b/internal/game/render_felt_precision_test.go
@@ -0,0 +1,41 @@
+package game
+
+import (
+	"strings"
+	"testing"
+
+	"thehouseoficarus/internal/casino"
+)
+
+// The felt is fixed-width art: a commission percentage must not lose its
+// trailing zero (0.9 used to trim "10" down to "1").
+func TestBaccaratFeltPrintsExactCommission(t *testing.T) {
+	cases := map[float64]string{
+		0.9:  "10% COMMISSION",
+		0.8:  "20% COMMISSION",
+		0.95: "5% COMMISSION",
+		0.99: "1% COMMISSION",
+	}
+	for payout, want := range cases {
+		cfg := casino.TableConfig{ID: "x", Game: casino.GameBaccarat,
+			Baccarat: casino.BaccaratConfig{Variant: casino.BaccaratCommission, BankerPayout: payout}}
+		art := renderBaccaratRulesFelt(cfg, "none", false)
+		if !strings.Contains(art, want) {
+			t.Fatalf("payout %v: missing %q in felt", payout, want)
+		}
+	}
+}
+
+// Bare %g prints shortest-round-trip floats (0.29 -> 28.999999999999996),
+// which overruns the fixed-width box borders.
+func TestBlackjackFeltPrintsRoundedShuffle(t *testing.T) {
+	cfg := casino.TableConfig{ID: "x", Game: casino.GameBlackjack,
+		Blackjack: casino.BlackjackConfig{ShuffleAt: 0.29}}
+	art := renderBlackjackRulesFelt(cfg, "none", false)
+	if !strings.Contains(art, "29% REMAINING") {
+		t.Fatalf("missing rounded shuffle value: %s", art)
+	}
+	if strings.Contains(art, "99999") || strings.Contains(art, "000000") {
+		t.Fatalf("float noise leaked into the felt: %s", art)
+	}
+}