tests: add TestJoinThroughFollower

tests/functional/join_test.go

@@ -0,0 +1,39 @@
+package test
+
+import (
+	"os"
+	"testing"
+	"time"
+)
+
+func TestJoinThroughFollower(t *testing.T) {
+	procAttr := new(os.ProcAttr)
+	procAttr.Files = []*os.File{nil, os.Stdout, os.Stderr}
+
+	_, etcds, err := CreateCluster(2, procAttr, false)
+	if err != nil {
+		t.Fatal("cannot create cluster")
+	}
+	defer DestroyCluster(etcds)
+
+	time.Sleep(time.Second)
+
+	newEtcd, err := os.StartProcess(EtcdBinPath, []string{"etcd", "-data-dir=/tmp/node3", "-name=node3", "-addr=127.0.0.1:4003", "-peer-addr=127.0.0.1:7003", "-peers=127.0.0.1:7002", "-f"}, procAttr)
+	if err != nil {
+		t.Fatal("failed starting node3")
+	}
+	defer func() {
+		newEtcd.Kill()
+		newEtcd.Release()
+	}()
+
+	time.Sleep(time.Second)
+
+	leader, err := getLeader("http://127.0.0.1:4003")
+	if err != nil {
+		t.Fatal("failed getting leader from node3:", err)
+	}
+	if leader != "http://127.0.0.1:7001" {
+		t.Fatal("expect http://127.0.0.1:7001 instead of", leader)
+	}
+}