Override load balancer alg view config map

controllers/nginx/pkg/template/configmap_test.go

@@ -74,3 +74,12 @@ func TestMergeConfigMapToStruct(t *testing.T) {
 		t.Errorf("unexpected diff: (-got +want)\n%s", diff)
 	}
 }
+
+func TestDefaultLoadBalance(t *testing.T) {
+	conf := map[string]string{
+	}
+	to := ReadConfig(conf)
+	if to.LoadBalanceAlgorithm != "least_conn" {
+		t.Errorf("default load balance algorithm wrong")
+	}
+}