chore: Add exchange type constant variable (direct, fanout, topic, headers)

Author: appleboy

options.go

@@ -7,6 +7,23 @@ import (
 	"github.com/golang-queue/queue/core"
 )
 
+// defined in rabbitmq client package.
+const (
+	ExchangeDirect  = "direct"
+	ExchangeFanout  = "fanout"
+	ExchangeTopic   = "topic"
+	ExchangeHeaders = "headers"
+)
+
+func isVaildExchange(name string) bool {
+	switch name {
+	case ExchangeDirect, ExchangeFanout, ExchangeTopic, ExchangeHeaders:
+		return true
+	default:
+		return false
+	}
+}
+
 // Option for queue system
 type Option func(*options)
 
@@ -104,7 +121,7 @@ func newOptions(opts ...Option) options {
 		subj:         "golang-queue",
 		tag:          "golang-queue",
 		exchangeName: "test-exchange",
-		exchangeType: "direct",
+		exchangeType: ExchangeDirect,
 		routingKey:   "test-key",
 		logger:       queue.NewLogger(),
 		autoAck:      false,
@@ -119,5 +136,9 @@ func newOptions(opts ...Option) options {
 		opt(&defaultOpts)
 	}
 
+	if !isVaildExchange(defaultOpts.exchangeType) {
+		defaultOpts.logger.Fatal("invaild exchange type: ", defaultOpts.exchangeType)
+	}
+
 	return defaultOpts
 }

options_test.go

@@ -0,0 +1,36 @@
+package rabbitmq
+
+import "testing"
+
+func Test_isVaildExchange(t *testing.T) {
+	type args struct {
+		name string
+	}
+	tests := []struct {
+		name string
+		args args
+		want bool
+	}{
+		{
+			name: "fanout",
+			args: args{
+				name: ExchangeFanout,
+			},
+			want: true,
+		},
+		{
+			name: "invaild exchange type",
+			args: args{
+				name: "test",
+			},
+			want: false,
+		},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := isVaildExchange(tt.args.name); got != tt.want {
+				t.Errorf("isVaildExchange() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}