1 files changed, 49 insertions, 0 deletions
diff --git a/internal/casino/blackjack_rules_test.go b/internal/casino/blackjack_rules_test.go
new file mode 100644
index 0000000..62f4d0a
--- /dev/null
+++ b/internal/casino/blackjack_rules_test.go
@@ -0,0 +1,49 @@
+package casino
+
+import (
+	"strings"
+	"testing"
+)
+
+func TestBlackjackRuleCardDefaultsAndOverrides(t *testing.T) {
+	yes, no := true, false
+	cases := []struct {
+		cfg  BlackjackConfig
+		want []string
+	}{
+		{BlackjackConfig{}, []string{"Number of decks: 8", "Blackjack pays 3:2", "Dealer stands on soft 17", "Double after split: Yes", "Maximum split hands: 4", "Surrender: Not offered"}},
+		{BlackjackConfig{Decks: 1, BlackjackPayout: 1.2, DealerHitSoft17: &yes, DoubleAfterSplit: &no, MaxSplitHands: 2, DoubleSplitBlackjack: &no}, []string{"Number of decks: 1", "Blackjack pays 6:5", "Dealer hits soft 17", "Double after split: No", "Re-splitting: No", "Split-and-doubled 21 receives blackjack payout: No"}},
+		{BlackjackConfig{Decks: 6, ResplitAces: &yes, Surrender: &yes}, []string{"Number of decks: 6", "Re-splitting aces: Yes", "Surrender: Late"}},
+	}
+	for _, tc := range cases {
+		cfg := TableConfig{ID: "test", Game: GameBlackjack, Blackjack: tc.cfg}
+		text := cfg.BlackjackRulesText()
+		for _, want := range tc.want {
+			if !strings.Contains(text, want) {
+				t.Errorf("missing %q in %s", want, text)
+			}
+		}
+		table := newBlackjackTable(42, cfg, newTestRand())
+		events := table.join("alice")
+		found := false
+		for _, e := range events {
+			if e.Message == text {
+				found = true
+				if e.Public {
+					t.Error("rules broadcast to bystanders")
+				}
+			}
+		}
+		if !found {
+			t.Fatal("joining did not display effective rules")
+		}
+	}
+}
+
+func TestSixToFiveNaturalPayout(t *testing.T) {
+	hand := &blackjackHand{bet: 10, cards: []card{{rank: "A"}, {rank: "K"}}}
+	_, payout, err := settleHand(hand, 20, false, BlackjackConfig{BlackjackPayout: 1.2})
+	if err != nil || payout != 22 {
+		t.Fatalf("payout=%d err=%v", payout, err)
+	}
+}