1 files changed, 61 insertions, 0 deletions
diff --git a/weed/mq/pub_balancer/allocate_test.go b/weed/mq/pub_balancer/allocate_test.go
new file mode 100644
index 000000000..298b9ebc1
--- /dev/null
+++ b/weed/mq/pub_balancer/allocate_test.go
@@ -0,0 +1,61 @@
+package pub_balancer
+
+import (
+	cmap "github.com/orcaman/concurrent-map/v2"
+	"github.com/seaweedfs/seaweedfs/weed/pb/mq_pb"
+	"reflect"
+	"testing"
+)
+
+func Test_allocateOneBroker(t *testing.T) {
+	brokers := cmap.New[*BrokerStats]()
+	brokers.SetIfAbsent("localhost:17777", &BrokerStats{
+		TopicPartitionCount: 0,
+		ConsumerCount:       0,
+		CpuUsagePercent:     0,
+	})
+
+	tests := []struct {
+		name            string
+		args            args
+		wantAssignments []*mq_pb.BrokerPartitionAssignment
+	}{
+		{
+			name: "test only one broker",
+			args: args{
+				brokers:        brokers,
+				partitionCount: 1,
+			},
+			wantAssignments: []*mq_pb.BrokerPartitionAssignment{
+				{
+					LeaderBroker: "localhost:17777",
+					Partition: &mq_pb.Partition{
+						RingSize:   MaxPartitionCount,
+						RangeStart: 0,
+						RangeStop:  MaxPartitionCount,
+					},
+				},
+			},
+		},
+	}
+	testThem(t, tests)
+}
+
+type args struct {
+	brokers        cmap.ConcurrentMap[string, *BrokerStats]
+	partitionCount int32
+}
+
+func testThem(t *testing.T, tests []struct {
+	name            string
+	args            args
+	wantAssignments []*mq_pb.BrokerPartitionAssignment
+}) {
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if gotAssignments := allocateTopicPartitions(tt.args.brokers, tt.args.partitionCount); !reflect.DeepEqual(gotAssignments, tt.wantAssignments) {
+				t.Errorf("allocateTopicPartitions() = %v, want %v", gotAssignments, tt.wantAssignments)
+			}
+		})
+	}
+}