1 files changed, 79 insertions, 0 deletions
diff --git a/internal/casino/roulette_history_test.go b/internal/casino/roulette_history_test.go
new file mode 100644
index 0000000..fbd2f65
--- /dev/null
+++ b/internal/casino/roulette_history_test.go
@@ -0,0 +1,79 @@
+package casino
+
+import (
+	"math/rand"
+	"reflect"
+	"testing"
+)
+
+func TestRouletteHistoryTracksCompletedSpinsOnly(t *testing.T) {
+	for _, double := range []bool{false, true} {
+		table := rouletteFixture()
+		table.Config.Roulette.DoubleZero = double
+		table.join("a")
+		wallet := &testWallet{chips: 1000}
+		rng := rand.New(rand.NewSource(7))
+		wheel := rouletteWheel(double)
+		var expected []string
+		var first *RouletteSnapshot
+		for i := 0; i < rouletteHistoryLimit+5; i++ {
+			table.bet("a", "red", 1, wallet)
+			before := table.view()
+			if !reflect.DeepEqual(before.History, expected) {
+				t.Fatalf("history changed on bet: %v", before.History)
+			}
+			// Two betting ticks, then two spinning ticks. No sample until the last.
+			for j := 0; j < 3; j++ {
+				table.tick()
+				if !reflect.DeepEqual(table.view().History, expected) {
+					t.Fatal("history revealed before settlement")
+				}
+			}
+			events := table.tick()
+			result := events[0].Snapshot.(*RouletteSnapshot)
+			expected = append(expected, wheel[rng.Intn(len(wheel))])
+			if len(expected) > rouletteHistoryLimit {
+				expected = expected[1:]
+			}
+			if !reflect.DeepEqual(result.History, expected) || result.Pockets[2] != expected[len(expected)-1] {
+				t.Fatalf("wrong result history: %v, want %v", result.History, expected)
+			}
+			if i == 0 {
+				first = result
+			}
+			if !reflect.DeepEqual(table.view().History, expected) {
+				t.Fatal("round reset lost history")
+			}
+		}
+		if len(first.History) != 1 || first.History[0] != first.Pockets[2] {
+			t.Fatal("later spins mutated an earlier snapshot")
+		}
+		snapshot := table.view()
+		snapshot.History[0] = "bad"
+		if !reflect.DeepEqual(table.view().History, expected) {
+			t.Fatal("snapshot aliases engine history")
+		}
+		table.refundAll()
+		table.tick()
+		if !reflect.DeepEqual(table.view().History, expected) {
+			t.Fatal("refund or idle tick changed history")
+		}
+		if len(rouletteFixture().view().History) != 0 {
+			t.Fatal("history leaked to another table")
+		}
+	}
+}
+
+func TestRouletteCancelledSpinDoesNotEnterHistory(t *testing.T) {
+	table := rouletteFixture()
+	table.join("a")
+	table.bet("a", "red", 1, &testWallet{chips: 100})
+	table.tick()
+	table.tick()
+	table.markDisconnected("a")
+	table.tick()
+	table.tick()
+	if len(table.view().History) != 0 {
+		t.Fatal("cancelled spin recorded a result")
+	}
+}