feat: subscribe to RabbitMQ trade signals and notify by rules

Consume configurable queues, format signals (including period), share NotifyService with HTTP, and drop duplicate bodies within 1h.

internal/config/config_test.go

@@ -0,0 +1,61 @@
+package config
+
+import "testing"
+
+func TestNormalizeSubscriptionDefaults(t *testing.T) {
+	cfg := &Config{Subscriptions: []SubscriptionConfig{{
+		URL:    "amqps://example.invalid/vhost",
+		Queue:  "trade.signal.notify.queue",
+		Source: "trade-signal",
+	}}}
+	if err := cfg.NormalizeSubscriptions(); err != nil {
+		t.Fatal(err)
+	}
+	s := cfg.Subscriptions[0]
+	if s.Name != "trade.signal.notify.queue" {
+		t.Fatalf("name=%q", s.Name)
+	}
+	if s.MaxRetry != 3 {
+		t.Fatalf("max_retry=%d", s.MaxRetry)
+	}
+	if s.ExchangeType != "fanout" {
+		t.Fatalf("exchange_type=%q", s.ExchangeType)
+	}
+	if s.Formatter != "trade_signal" {
+		t.Fatalf("formatter=%q", s.Formatter)
+	}
+}
+
+func TestNormalizeSkipsEmptyURL(t *testing.T) {
+	cfg := &Config{Subscriptions: []SubscriptionConfig{{
+		Queue: "q", Source: "s",
+	}}}
+	if err := cfg.NormalizeSubscriptions(); err != nil {
+		t.Fatal(err)
+	}
+	if n := len(cfg.ActiveSubscriptions()); n != 0 {
+		t.Fatalf("active=%d", n)
+	}
+}
+
+func TestNormalizeUnknownFormatter(t *testing.T) {
+	cfg := &Config{Subscriptions: []SubscriptionConfig{{
+		URL: "amqps://example.invalid/vhost", Queue: "q", Source: "s", Formatter: "other",
+	}}}
+	if err := cfg.NormalizeSubscriptions(); err == nil {
+		t.Fatal("expected error")
+	}
+}
+
+func TestQuantityMultiplierFor(t *testing.T) {
+	o := StrategyOverride{QuantityMultipliers: QuantityMultipliers{Open: 100, Add: 0}}
+	if o.QuantityMultiplierFor("OPEN") != 100 {
+		t.Fatalf("open=%v", o.QuantityMultiplierFor("OPEN"))
+	}
+	if o.QuantityMultiplierFor("ADD") != 1 {
+		t.Fatalf("add<=0 should be 1, got %v", o.QuantityMultiplierFor("ADD"))
+	}
+	if o.QuantityMultiplierFor("UNKNOWN") != 1 {
+		t.Fatalf("unknown=%v", o.QuantityMultiplierFor("UNKNOWN"))
+	}
+}